35,432 results match your criteria Dalton transactions Cambridge England : 2003[Journal]


Feasibility of integrated, multilevel care for cardiovascular diseases (CVD) and HIV in low- and middle-income countries (LMICs): A scoping review.

PLoS One 2019 22;14(2):e0212296. Epub 2019 Feb 22.

Department of Epidemiology, New York University College of Global Public Health, New York, New York, United States of America.

Background: Integrated cardiovascular disease (CVD) and HIV (CVD-HIV) care interventions are being adopted to tackle the growing burden of noncommunicable diseases (NCDs) in low-and middle-income countries (LMICs) but there is a paucity of studies on the feasibility of these interventions in LMICs. This scoping review aims to present evidence of the feasibility of integrated CVD-HIV care in LMICs, and the alignment of feasibility reporting in LMICs with the existing implementation science methodology.

Methods: A systematic search of published articles including systematic and narrative reviews that reported on integrated CVD-HIV care was conducted, using multiple search engines including PubMed/Medline, Global Health, and Web of Science. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0212296PLOS
February 2019

Syntheses, structures, magnetism and electrocatalytic oxygen evolution for four cobalt, manganese and copper complexes with dinuclear, 1D and 3D structures.

Dalton Trans 2019 Feb 22. Epub 2019 Feb 22.

Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China.

Four 3-(tetrazol-5-yl)-5-(pyrid-2-yl)-1,2,4-triazole (H2TPT) based complexes of [Co2(TPT)2(H2O)2] (1), [Mn2(TPT)2(H2O)2] (2), [Mn(TPT)(H2O)2]n (3) and [Cu(TPT)]n (4) have been solvothermally synthesized and structurally characterized by X-ray single-crystal diffraction analysis. Complexes 1 and 2 display isostructural dinuclear structures, while complex 3 exhibits a 1D zigzag chain structure. The structural difference for 2 and 3 may be caused by 100 and 160 °C temperature-controlled conditions. Read More

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http://dx.doi.org/10.1039/c9dt00227hDOI Listing
February 2019

Synthesis and iron chelating properties of hydroxypyridinone and hydroxypyranone hexadentate ligands.

Dalton Trans 2019 Feb 22. Epub 2019 Feb 22.

Institute of Pharmaceutical Sciences, King's College London, 150 Stamford Street, London, SE1 9NH, UK.

Chelation therapy has become an important therapeutic approach for some diseases. In attempt to identify clinically useful chelators, four hexadentate ligands were synthesized by conjugating the corresponding bidentate ligands (3-hydroxypyridin-4-one (3,4-HOPO), 3-hydroxypyridin-2-one (3,2-HOPO), 1-hydroxypyridin-2-one (1,2-HOPO), and 3-hydroxypyran-4-one) each with a free amino group to a tripodal acid. Their pKa values and affinities for iron(iii) were investigated. Read More

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http://dx.doi.org/10.1039/c8dt05014gDOI Listing
February 2019

A platinum(iv) prodrug to defeat breast cancer through disrupting vasculature and inhibiting metastasis.

Dalton Trans 2019 Feb 22. Epub 2019 Feb 22.

State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, P. R. China.

A PtIV prodrug (PDMA) exhibits great potential for the therapy of metastatic triple-negative breast cancer (TNBC) through a synergistic action of antiangiogensis and antimetastasis. Read More

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http://dx.doi.org/10.1039/c9dt00335eDOI Listing
February 2019

Mixed er-NHC/phosphine Pd(ii) complexes and their catalytic activity in the Buchwald-Hartwig reaction under solvent-free conditions.

Dalton Trans 2019 Feb 22. Epub 2019 Feb 22.

A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prospect 29, Moscow, 119991, Russian Federation.

A series of novel (NHC)PdCl2-PR3 complexes were synthesized and fully characterized by 1H, 13C, 31P NMR and FT-IR spectroscopy. These complexes showed high catalytic activity toward solvent-free Buchwald-Hartwig amination. Both primary and secondary amines were efficiently utilized under the same reaction conditions. Read More

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http://dx.doi.org/10.1039/c9dt00216bDOI Listing
February 2019

Selectively detecting toluene and benzaldehyde by two stable lanthanide-organic frameworks as luminescent probes.

Dalton Trans 2019 Feb 22. Epub 2019 Feb 22.

Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry, MOE, Nankai University, Tianjin 300071, China.

Benzene derivatives are seriously harmful to environment and human health, and sensitively detecting these compounds is of great significance but is a challenge. Hence, we designed and synthesized two luminescent lanthanide-organic frameworks, [{Ln(SIP)(H2O)4}]n, [Ln = Tb (1), Eu (2)], with high solvent and pH stability, which can be used as luminescent probes to detect toluene and benzaldehyde among various reagents, and the detection limit can reach up to 10-7 mol L-1 for toluene, and 10-6 mol L-1 for benzaldehyde. Regenerated experimental results indicate that both 1 and 2 can be used for at least five cycles with high precision. Read More

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http://dx.doi.org/10.1039/c8dt05108aDOI Listing
February 2019

Synthesis and characterisation of homoleptic 2,9-diaryl-1,10-phenanthroline copper(i) complexes: influencing selectivity in photoredox-catalysed atom-transfer radical addition reactions.

Dalton Trans 2019 Feb 22. Epub 2019 Feb 22.

School of Natural Sciences - Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia.

This report details the synthesis and characterisation of eight homoleptic bis(2,9-diaryl-1,10-phenanthroline)copper(i) complexes, seven of which are previously unreported {aryl = p-CF3C6H4, p-FC6H4, m,p-(OMe)2C6H3, o,p-(OMe)2C6H3, p-OMe-m,m-Me2C6H2, p-OMe-m,m-(t-Bu)2C6H2, 9,9-dimethyl-9H-fluoren-2-yl, 4-(9H-carbazol-9-yl)phenyl)}. Where possible the solid state, photophysical and electrochemical properties of these complexes were studied. In order to obtain insights into the influence of the intrinsic features of these copper(i) complexes on their reactivity in visible light-mediated photoredox catalysis, their capacity to promote a known atom-transfer radical addition process was evaluated. Read More

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http://dx.doi.org/10.1039/c8dt04116dDOI Listing
February 2019

Cytokine Research in Depression: Principles, Challenges, and Open Questions.

Front Psychiatry 2019 7;10:30. Epub 2019 Feb 7.

Department of Psychological Medicine, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, United Kingdom.

Cytokines have been implicated in the pathology of depression. Currently, the evidence is based on cross-sectional studies and meta-analytic research comparing blood concentrations of T helper type 1 (T1), T helper type 2 (T2), pro-inflammatory or anti-inflammatory cytokines of patients with a depressive disorder to those of healthy controls. Additionally, multiple longitudinal studies have investigated cytokine levels during antidepressant treatment. Read More

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http://dx.doi.org/10.3389/fpsyt.2019.00030DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6374304PMC
February 2019

A multiplex fragment ion-based method for accurate proteome quantification.

Anal Chem 2019 Feb 21. Epub 2019 Feb 21.

Multiplex proteome quantification with high accuracy is urgently required to achieve a comprehensive understanding of dynamic cellular and physiological processes. Among the existing quantification strategies, fragment ion-based methods can provide highly accurate results, but the multiplex capacity is limited to 3-plex. Herein, we developed a multiplex pseudo-isobaric dimethyl labeling (m-pIDL) method to extend the capacity of the fragment ion-based method to 6-plex by one-step dimethyl labeling with several millidalton and dalton mass differences between precursor ions and enlarging the isolation window of precursor ions to 10 m/z during data acquisition. Read More

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http://dx.doi.org/10.1021/acs.analchem.8b04806DOI Listing
February 2019

Isolation of two bis(silyl)nickel complexes with Si-Si bond formation in a single-crystal-to-single-crystal fashion.

Dalton Trans 2019 Feb 21. Epub 2019 Feb 21.

Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, Nanjing 210023, China. and Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing 211816, China.

A unique penta-coordinate nickel complex [{1,2-C6H4(SiMe2)(SiH)}2Ni(PEt3)(depe)] (6) that generates two new Si-Si single bonds has been prepared exclusively by the reaction of a chelating silyl hydride 1-(dimethylsilyl)-2-silylbenzene (4) and Ni(depe)(PEt3)2 (depe = Et2PCH2CH2PEt2) in a 2 : 1 ratio. Complex 6 is the first example of mononuclear silyl nickel complexes containing a Si-Si single bond formed in situ. Interestingly, framework 6 exhibits reversible single-crystal-to-single-crystal transformations upon the removal and rebinding of the coordinating PEt3 molecule, which give rise to a PEt3-free complex [{1,2-C6H4(SiMe2)(SiH)}2Ni(depe)] (6'), concomitant with the alteration of the coordination geometry of central metal atoms. Read More

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http://dx.doi.org/10.1039/c8dt04951cDOI Listing
February 2019

A decanuclear [DyZn] cluster: a {Zn} rectangle surrounding an octahedral {Dy} single molecule magnet.

Dalton Trans 2019 Feb 21. Epub 2019 Feb 21.

Department of Chemistry, The University of Crete, Voutes 71003, Herakleion, Greece.

An octahedral {DyIII6} cage within a diamagnetic {ZnII4} rectangle is reported, with magnetic relaxation studies revealing single-molecule magnet behaviour for the complex under zero external dc field with Ueff = 43 K and τo = 1 × 10-5 s. Read More

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http://dx.doi.org/10.1039/c9dt00440hDOI Listing
February 2019

DFT studies on mechanistic origins of ligand-controlled selectivity in Pd-catalyzed non-decarbonylative and decarbonylative reductive conversion of acyl fluoride.

Dalton Trans 2019 Feb 21. Epub 2019 Feb 21.

Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China.

The mechanisms and origins for ligand-controlled non-decarbonylative and decarbonylative conversions of acyl fluorides catalyzed by palladium catalysts with different ligands tricyclohexylphosphine (PCy3) and 1,2-bis(dicyclohexylphosphino)ethane (DCPE) have been investigated by density functional theory (DFT) calculations. In the case of the DCPE ligand, the favorable catalytic cycle contains four steps, oxidative addition, decarbonylation, transmetallation and reductive elimination. In the case of the PCy3 ligand, the favorable catalytic cycle proceeds by three steps, oxidative addition, transmetallation and reductive elimination. Read More

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http://dx.doi.org/10.1039/c9dt00450eDOI Listing
February 2019

Influence of ancillary ligands and solvents on the nuclearity of Ni-Ln complexes.

Dalton Trans 2019 Feb 21. Epub 2019 Feb 21.

Institu Néel, CNRS, BP 166, 25 Avenue des Martyrs, 38042, Grenoble Cedex 9, France and and Physikalisches Institut and Institute of Nanotechnology, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany.

A Schiff base ligand resulting from the reaction of ovanillin and 2,2-dimethyl-1,3-diaminopropane allows the preparation of hetero-dinuclear [Ni-Ln]3+ or -trinuclear [Ni-Ln-Ni]3+ complexes. Although empirical parameters for rationalizing the strength of the ferromagnetic Ni-Gd interaction have already been discussed in several papers, no systematic study has been devoted to the control of the nuclearity of such complexes. With the help of structural determinations, we demonstrate the role of solvent and of the nature of ancillary ligands, linked to the Ln ions, in nuclearity. Read More

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http://dx.doi.org/10.1039/c9dt00370cDOI Listing
February 2019

Towards highly active and stable nickel-based metal-organic frameworks as ethylene oligomerization catalysts.

Dalton Trans 2019 Feb 21. Epub 2019 Feb 21.

Technische Universität Dresden, Department of Inorganic Chemistry, Bergstraße 66, D-01062 Dresden, Germany.

Catalytic ethylene oligomerization proceeds under mild conditions with high activity using porous or non-porous nickel-based coordination polymers/metal-organic frameworks (MOFs) as catalysts. The role of MOFs as catalyst precursors and the crucial impact of metal coordination on the catalyst activity and leaching are elucidated by comparing MOFs constructed from different clusters and linkers. The stronger the coordination bond of organic linkers to the Ni center, the lower the catalytic activity of the MOF, as shown for CPO-27(Ni). Read More

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http://dx.doi.org/10.1039/c8dt03866jDOI Listing
February 2019

Effects of the number of cyclometalated rings and ancillary ligands on the rate of MeI oxidative addition to platinum(ii)-pincer complexes.

Dalton Trans 2019 Feb 21. Epub 2019 Feb 21.

Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 71467-13565, Iran.

Organoplatinum(ii)-pincer complexes [Pt(C^N^C)(L)] (2a; L = PPh2Me, 2b; L = pyridine (py), 2c; L = 4-picoline (pic)) are synthesized by the reaction of [Pt(C^N^C)(DMSO)], 1, with 1 equiv. of L, where HC^N^CH = 2,6-diphenylpyridine. Complexes 2 have 5d(Pt) → π*(pincer) metal-to-ligand charge-transfer bands in the visible region, which were used to easily follow the kinetics of their reactions with MeI by using UV-vis spectroscopy. Read More

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http://dx.doi.org/10.1039/c9dt00205gDOI Listing
February 2019

Water sports could contribute to the translocation of ranaviruses.

Sci Rep 2019 Feb 20;9(1):2340. Epub 2019 Feb 20.

SERIDA, Servicio Regional de Investigación y Desarrollo Agroalimentario, Gijón, Asturias, Spain.

Ranaviruses have been identified as the cause of explosive disease outbreaks in amphibians worldwide and can be transmitted between hosts both via direct and indirect contact, in which humans might contribute to the translocation of contaminated material. The aim of this study was to evaluate the possible role of water sports in the human translocation of ranavirus, Batrachochytrium dendrobatidis (Bd), and B. salamandrivorans (Bsal). Read More

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http://dx.doi.org/10.1038/s41598-019-39674-5DOI Listing
February 2019

Linking Coronary Microvascular and Cardiac Diastolic Dysfunction in Diabetes: Are Women More Vulnerable?

Authors:
Shawn B Bender

Diabetes 2019 Mar;68(3):474-475

Biomedical Sciences, University of Missouri, Columbia, MO

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http://dx.doi.org/10.2337/dbi18-0053DOI Listing

Charge variants characterization and release assay development for co-formulated antibodies as a combination therapy.

MAbs 2019 Feb 20:1-11. Epub 2019 Feb 20.

a Department of Analytical Sciences , MedImmune , Gaithersburg , MD , USA.

Combination therapy is a fast-growing strategy to maximize therapeutic benefits to patients. Co-formulation of two or more therapeutic proteins has advantages over the administration of multiple medications, including reduced medication errors and convenience for patients. Characterization of co-formulated biologics can be challenging due to the high degree of similarity in the physicochemical properties of co-formulated proteins, especially at different concentrations of individual components. Read More

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http://dx.doi.org/10.1080/19420862.2019.1578137DOI Listing
February 2019

Enhanced photocatalytic hydrogen evolution over bimetallic zeolite imidazole framework-encapsulated CdS nanorods.

Dalton Trans 2019 Feb 20. Epub 2019 Feb 20.

School of Materials Science and Engineering, University of Jinan, Jinan 250022, China.

A hybrid of ZIF-8 with CdS nanorods could increase the transport efficiency of photo-generated charge carriers and the surface area. Notably, through doping Zn ions with a transition metal, in this work, we fabricated a bimetallic ZnM-ZIF (M = Ni, Cu, or Co)-encapsulated CdS nanorod heterostructure for the first time. Compared with ZIF-8, the bimetallic ZIF exhibited a modulated structure, flat band position, and lower overpotential for the hydrogen evolution reaction. Read More

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http://dx.doi.org/10.1039/c8dt04964eDOI Listing
February 2019

Nanosheets of MIL-53(Al) applied in membranes with improved CO/N and CO/CH selectivities.

Dalton Trans 2019 Feb 20. Epub 2019 Feb 20.

Chemical and Environmental Engineering Department, Instituto de Nanociencia de Aragón (INA) and Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, 50018 Zaragoza, Spain.

MIL-68(Al) and MIL-53(Al) are carboxylate-based metal-organic frameworks (MOFs) with the same chemical composition but different structures (polymorphs). In this study, MIL-53(Al) nanosheets of ca. 150 nm in size with an average thickness of 3. Read More

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http://dx.doi.org/10.1039/c8dt03774dDOI Listing
February 2019

Self-assembly processes of octahedron-shaped PdL cages.

Dalton Trans 2019 Feb 20. Epub 2019 Feb 20.

Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan.

Self-assembly processes of three octahedron-shaped [Pd6L12]12+ cages were investigated by an NMR-based quantitative approach. As to the on-pathway of the Pd6L12 cage assembly, the final intramolecular ligand exchange in an incomplete cage, [Pd6L12Py*]12+ (Py*: 3-chloropyridine, which was used as a leaving ligand), is the rate-determining step in the self-assembly of all the three [Pd6L12]12+ cages. Contrary to the previous finding that the self-assembly of [PdmL2m]2m+ structures (m = 2, 3) and [Pd6L8]12+ capsules from rigid multitopic ligands efficiently takes place without the formation of kinetically trapped species under mild conditions, in the self-assembly of the [Pd6L12]12+ cages, even relatively rigid ditopic ligands co-produced 100 nm-sized kinetic traps through off-pathways, which would be because the energy landscape becomes more complicated by increasing the number of components in the final assembly. Read More

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http://dx.doi.org/10.1039/c8dt04931aDOI Listing
February 2019

GRIN2B promoter methylation deficits in early-onset schizophrenia and its association with cognitive function.

Epigenomics 2019 Feb 20. Epub 2019 Feb 20.

Biomolecular Sciences Research Centre, Sheffield Hallam University, UK.

Aim: We investigated GRIN1 and GRIN2B promoter methylation in first-episode schizophrenia patients compared with siblings and controls, testing for correlations between DNA methylation, cognitive performance and clinical variables.

Materials & Methods: Blood-derived DNA from all groups underwent bisulfite conversion and pyrosequencing to determine methylation at CpG sites within the GRIN1 and GRIN2B promoters and results were compared with the measure of global methylation LINE-1.

Results: We found hypomethylation among all CpGs analyzed within GRIN2B promoter in patients and greater LINE-1 methylation in patients and siblings. Read More

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http://dx.doi.org/10.2217/epi-2018-0127DOI Listing
February 2019

A turn-on phosphorescent sensor of Pb in water by the formation of a coordination polymer.

Dalton Trans 2019 Feb 20. Epub 2019 Feb 20.

Department of Chemistry "G. Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy.

Hexakis(phenylthio)benzene compounds carrying six carboxylic acid groups at their periphery combine aggregation-induced phosphorescence, water-solubility and metal-binding properties: the para-isomer is a selective and sensitive turn-on phosphorescent sensor of Pb2+ ions in water. Read More

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http://dx.doi.org/10.1039/c9dt00251kDOI Listing
February 2019
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High-discharge-voltage lithium-rich layered-oxide cathode materials based on low oxygen vacancy.

Dalton Trans 2019 Feb 20. Epub 2019 Feb 20.

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.

We prepare the lithium-rich layered oxide Li1.2Mn0.54Co0. Read More

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http://xlink.rsc.org/?DOI=C9DT00193J
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http://dx.doi.org/10.1039/c9dt00193jDOI Listing
February 2019
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Synthesis, structural and physicochemical characterization of a new type Ti-oxo cluster protected by a cyclic imide dioxime ligand.

Dalton Trans 2019 Feb 20. Epub 2019 Feb 20.

Section of Inorganic and Analytical Chemistry, University of Ioannina, Ioannina 45110, Greece.

Reaction of the cyclic ligand (2Z,6Z)-piperidine-2,6-dione dioxime with TiCl4 and KOH yielded the hexanuclear cluster K6[TiIV6(μ3-O)2(μ2-O)3(CH3O)6(μ2-η1,η1,η2-Hpidiox-O,N,O')4(μ2-η1,η1,η2-pidiox-O,N,O')2]·7.5CH3OH possessing a new {Ti6O5} structural motif. The cluster core {Ti6O5} is wrapped by external tripodal imide dioxime ligands, showing good solubility and stability and thus, allowing its solution to be studied by means of electrospray ionization mass spectrometry, electrochemistry and 2D NMR, c. Read More

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http://dx.doi.org/10.1039/c9dt00658cDOI Listing
February 2019

Flower-like FeS/BiS superstructures with improved near-infrared absorption for efficient chemo-photothermal therapy.

Dalton Trans 2019 Feb 20. Epub 2019 Feb 20.

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P.R. China. and College of Health Science and Environmental Engineering, Shenzhen Technology University, Shenzhen 518118, China.

Although various photothermal therapy (PTT) nanoagents have been developed in recent years, the rational design and easy synthesis of a PTT nanoplatform with improved near-infrared (NIR) absorption have remained challenging. Herein, via a facile one-pot solvothermal strategy, hydrophilic nanosheet-assembled flower-like Fe7S8/Bi2S3 superstructures were fabricated successfully. Such nanoflowers exhibit improved NIR absorption, which is 1. Read More

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http://dx.doi.org/10.1039/c8dt04280bDOI Listing
February 2019

Structural and thermodynamic aspects of hydration of Gd(iii) systems.

Dalton Trans 2019 Feb 20. Epub 2019 Feb 20.

University of Wrocław, Faculty of Chemistry, F. Joliot-Curie 14, 50-383 Wrocław, Poland.

X-ray crystal structures of Gd(iii) and Lu(iii) aqua ions as well as their complexes with polyaminopolycarboxylates (EDTA, CDTA, EGTA, DTPA, DOTA) were determined: [Gd(H2O)9](CF3SO3)3, [Gd(H2O)8]Cl3·C10H20O5, [Lu(H2O)8]Cl3·C12H24O6·4H2O, [C(NH2)3][Gd(EDTA)(H2O)3], [C(NH2)3]2[Lu(EDTA)(H2O)2]ClO4·6H2O, [C(NH2)3][Lu(CDTA)(H2O)2]·6H2O, [C(NH2)3][Gd(EGTA)(H2O)]·2H2O, [C(NH2)2(N2H4)][Gd(HDTPA)(H2O)]·2H2O, Na[Gd(DOTA)(H2O)]·4H2O, and K2[Lu(DOTA)]Cl·4.6H2O. The weighted sums of UV absorption spectra of appropriate crystals were used to reproduce the spectra of the Gd(iii) aqueous solutions in the temperature range 276-363 K. Read More

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http://dx.doi.org/10.1039/c8dt04869jDOI Listing
February 2019

Carbon-reduction as an easy route for the synthesis of VO (M1) and further Al, Ti doping.

Dalton Trans 2019 Feb 20. Epub 2019 Feb 20.

CNRS, Univ. Bordeaux, ICMCB UMR 5026, Pessac, F-33600, France.

A low-cost and facile method to synthesize highly crystallized VO2 (M1) particles is proposed, using carbon black as the reducing agent mixed with V2O5 nanopowders comparing two types of vacuum systems for the thermal activation. In a sealed vacuum system, CO gas is generated in the first reductive step, and continues to reduce the new born VO2, until all the V (+4) is reduced to V (+3), resulting in V2O3 formation at 1000 °C. In contrast, in a dynamic vacuum system, CO gas is ejected through pumping as soon as it is generated, leading to the formation of pure VO2 (M1) at high temperatures (i. Read More

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http://dx.doi.org/10.1039/c8dt04914aDOI Listing
February 2019

Non-conventional synthesis and photophysical studies of platinum(ii) complexes with methylene bridged 2,2'-dipyridylamine derivatives.

Dalton Trans 2019 Feb 20. Epub 2019 Feb 20.

Department of Chemistry, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland.

Methylene bridged 2,2'-dipyridylamine (dpa) derivatives and their metal complexes possess outstanding properties due to their inherent structural flexibility. Synthesis of such complexes typically involves derivatization of dpa followed by coordination on metals, and may not always be very efficient. In this work, an alternative synthetic approach, involving the derivatization step after - rather than prior to - coordination of dpa on metal center, is proposed and applied to synthesis of a number of platinum(ii) complexes with substituted benzyldi(2-pyridyl)amines. Read More

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http://dx.doi.org/10.1039/c8dt03912gDOI Listing
February 2019

FraC nanopores with adjustable diameter identify the mass of opposite-charge peptides with 44 dalton resolution.

Nat Commun 2019 Feb 19;10(1):835. Epub 2019 Feb 19.

Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, 9747 AG, Groningen, The Netherlands.

A high throughput single-molecule method for identifying peptides and sequencing proteins based on nanopores could reduce costs and increase speeds of sequencing, allow the fabrication of portable home-diagnostic devices, and permit the characterization of low abundance proteins and heterogeneity in post-translational modifications. Here we engineer the size of Fragaceatoxin C (FraC) biological nanopore to allow the analysis of a wide range of peptide lengths. Ionic blockades through engineered nanopores distinguish a variety of peptides, including two peptides differing only by the substitution of alanine with glutamate. Read More

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http://dx.doi.org/10.1038/s41467-019-08761-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6381162PMC
February 2019

A new approach to enhancing the CO capture performance of defective UiO-66 via post-synthetic defect exchange.

Dalton Trans 2019 Feb 19. Epub 2019 Feb 19.

Energy Safety Research Institute, Swansea University, Fabian Way, Swansea, SA1 8EN, UK.

Zirconium-based metal-organic frameworks (Zr-MOFs) are a subclass of MOFs known for their remarkable stability, especially in the presence of water. This makes them extremely attractive for practical applications, including CO2 capture from industrial emission sources; however, the CO2 adsorption capacity of Zr-MOFs is moderate compared to that of the best performing MOFs reported to date. Functionalization of Zr-MOFs with amino groups has been demonstrated to increase their affinity for CO2. Read More

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http://dx.doi.org/10.1039/c9dt00154aDOI Listing
February 2019

Catalytic intramolecular hydroamination of aminoallenes using titanium complexes of chiral, tridentate, dianionic imine-diol ligands.

Dalton Trans 2019 Feb 19. Epub 2019 Feb 19.

Harvey Mudd College, 301 Platt Blvd., Claremont, CA 91711, USA.

Alkylation of d- or l-phenylalanine or valine alkyl esters was carried out using methyl or phenyl Grignard reagents. Subsequent condensation with salicylaldehyde, 3,5-di-tert-butylsalicylaldehyde, or 5-fluorosalicylaldehyde formed tridentate, X2L type, Schiff base ligands. Chiral shift NMR confirmed retention of stereochemistry during synthesis. Read More

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http://dx.doi.org/10.1039/c8dt05156aDOI Listing
February 2019

A high-entropy B(HfMoTaTi)C and SiC ceramic composite.

Dalton Trans 2019 Feb 19. Epub 2019 Feb 19.

Division of Materials Science, Luleå University of Technology, 971 87 Luleå, Sweden.

A multicomponent composite of refractory carbides, B4C, HfC, Mo2C, TaC, TiC and SiC, of rhombohedral, face-centered cubic (FCC) and hexagonal crystal structures is reported to form a single phase B4(HfMo2TaTi)C ceramic with SiC. The independent diffusion of the metal and nonmetal atoms led to a unique hexagonal lattice structure of the B4(HfMo2TaTi)C ceramic with alternating layers of metal atoms and C/B atoms. In addition, the classical differences in the crystal structures and lattice parameters among the utilized carbides were overcome. Read More

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http://dx.doi.org/10.1039/c8dt04555kDOI Listing
February 2019

A molecular noble metal-free system for efficient visible light-driven reduction of CO to CO.

Dalton Trans 2019 Feb 19. Epub 2019 Feb 19.

Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Hong Kong, China.

A new pentadentate quinoline-pyridine ligand and its iron (1), cobalt (2) and nickel (3) complexes have been synthesized and characterized. The iron complex exhibits excellent photocatalytic activity towards CO2-to-CO conversion with a TON(CO) of 544 and a selectivity of 99.3% using the commercially available organic dye purpurin as the photosensitiser and BIH as the electron donor. Read More

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http://dx.doi.org/10.1039/c9dt00425dDOI Listing
February 2019

(Diphenylphosphino)alkylaldehyde affords hydride- or alkyl-[(diphenylphosphino)alkylacyl]rhodium(iii) or (diphenylphosphino)alkylester complexes: theoretical and experimental diastereoselectivity.

Dalton Trans 2019 Feb 19. Epub 2019 Feb 19.

Facultad de Química de San Sebastián, Universidad del País Vasco (UPV/EHU), Apdo. 1072, 20080 San Sebastián, Spain.

The reaction of [RhCl(COD)]2 (COD = 1,5-cyclooctadiene) with racemic PPh2(CH(Ph)CH2CHO) and pyridine (py) led to the oxidative addition of the aldehyde, and a single geometric isomer of [RhHCl(PPh2(CH(Ph)CH2CO))(py)2] (1), with hydride trans to chloride, was obtained as a mixture of two diastereomers in a 95 : 5 ratio; this was in agreement with density functional theory (DFT) calculations. In a chloroform solution, the exchange of hydride by chloride yielded [RhCl2(PPh2(CH(Ph)CH2CO))(py)2] (2) as a mixture of a kinetically preferred species, trans-py-2a, and two diastereomers, cis-Cl-2b' and cis-Cl-2b, with cis pyridines and a chloride trans to acyl; as predicted by the DFT calculations, the latter was the major species. Complex 1 reacted with racemic PPh2(CH(Ph)CH2CHO) or PPh2(o-C6H4CHO) to afford [RhHCl(PPh2(CH(Ph)CH2CO))(κ1-PPh2(CH(Ph)CH2CHO))(py)] (3) or [RhHCl(PPh2(o-C6H4CO))(κ1-PPh2(CH(Ph)CH2CHO))(py)] (4), respectively, both with a dangling alkylaldehyde. Read More

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http://dx.doi.org/10.1039/c8dt04929gDOI Listing
February 2019

Europium and ytterbium complexes with o-iminoquinonato ligands: synthesis, structure, and magnetic behavior.

Dalton Trans 2019 Feb 19. Epub 2019 Feb 19.

Nikolaev Institute of Inorganic Chemistry, Siberian Division of RAS, Akad. Lavrentieva str. 3, 630090 Novosibirsk, Russia and Department of Natural Sciences, Novosibirsk State University, Pirogova Street 2, 630090 Novosibirsk, Russia.

Complexes of divalent ytterbium (1) and europium (2) with a dianionic o-amidophenolate ligand were prepared by both the direct reduction of 4,6-di-tert-butyl-N-(2,6-diisopropylphenyl)-o-iminobenzoquinone (dpp-IQ) and the salt metathesis reaction of potassium o-amidophenolate with LnI2 (Ln = Yb, Eu). Oxidation of o-amidophenolates 1, 2 with one equivalent of dpp-IQ as well as the salt metathesis reaction of potassium o-iminosemiquinolate with LnI2 afforded ligand mixed-valent o-iminosemiquinonato-amidophenolato complexes of trivalent ytterbium (3) and europium (4). All novel complexes 1-4 were fully characterized, including the solid state structures of 1 and 2 determined by single crystal X-ray diffraction. Read More

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http://dx.doi.org/10.1039/c8dt04849eDOI Listing
February 2019

Hexavacant γ-Dawson-type phosphotungstates supporting an edge-sharing bis(square-pyramidal) {OM(μ-O)(μ-OAc)MO} core (M = Mn, Co, Ni, Cu, or Zn).

Dalton Trans 2019 Feb 19. Epub 2019 Feb 19.

Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.

In aqueous media, the introduction of additional metal species into polyoxometalates (POMs) with multiple vacant sites, such as a hexavacant Dawson-type phosphotungstate, which is of interest for the synthesis of novel metal oxide clusters, is generally difficult because they easily undergo self-condensation and/or structural decomposition. In this study, we succeeded in developing a novel synthetic method to obtain metal-substituted γ-Dawson-type phosphotungstate monomers by introducing metal species into an organic solvent-soluble lacunary phosphotungstate, TBA4H10[α-P2W12O48] (I) (TBA = tetra-n-butylammonium), in organic media. The reaction of I, which possessed two types of vacant sites, i. Read More

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http://dx.doi.org/10.1039/c8dt04850aDOI Listing
February 2019

Synthesis of new Mn analogues and their structural, electrochemical and catalytic properties.

Dalton Trans 2019 Feb 19. Epub 2019 Feb 19.

IUT Robert Schuman, Département Chimie, 72 route du Rhin, BP 70028, Illkirch 67411, France.

We report the synthesis and structural characterisation of new Mn19 and Mn18M analogues, [MnIII12MnII7(μ4-O)8(μ3-OCH3)2(μ3-Br)6(HLMe)12(MeOH)6]Br2 (2) and [MnIII12MnII6Sr(μ4-O8(μ3-Cl)8(HLMe)12(MeCN)6]Cl2 cluster (3), where H3LMe is 2,6-bis(hydroxymethyl)-p-cresol. The electrochemistry of 2 and 3 has been investigated and their activity as catalysts in the oxidation of benzyl alcohol has been evaluated. Selective oxidation of benzyl alcohol to benzaldehyde by O2 was achieved using 1 mol% of catalyst with conversions of 74% (2) and 60% (3) at 140 °C using TEMPO as a co-catalyst. Read More

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http://dx.doi.org/10.1039/c8dt04807jDOI Listing
February 2019
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In situ topotactic formation of 2D/2D direct Z-scheme CuS/ZnCdS in-plane intergrowth nanosheet heterojunctions for enhanced photocatalytic hydrogen production.

Dalton Trans 2019 Feb 19. Epub 2019 Feb 19.

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P. Box 98, Beisanhuan East Road 15, Beijing 100029, P. R. China and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, P. Box 98, Beisanhuan East Road 15, Beijing 100029, P. R. China.

Zinc cadmium sulfide solid solution (ZnxCd1-xS) photocatalysts have received significant attention in energy and environmental applications because of their wide and strong visible light absorption range. However, the high photogenerated electron-hole pair recombination rate is an innate problem for their application. In this study, Cu2S/Zn0. Read More

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http://dx.doi.org/10.1039/c8dt04154gDOI Listing
February 2019
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Structure of sirohydrochlorin ferrochelatase SirB: the last of the structures of the class II chelatase family.

Dalton Trans 2019 Feb 19. Epub 2019 Feb 19.

Department of Biochemistry and Molecular Biology, Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama 338-8570, Japan.

The crystal structure of Bacillus subtilis SirB, which catalyses the insertion of Fe2+ into the substrate sirohydrochlorin (SHC) in siroheme biosynthesis, is reported herein as the last of the structures of class II chelatases. The structure of SirB with Co2+ showed that the active site of SirB is located at the N-terminal domain with metal-binding amino acid residues His10, Glu43, and His76, which was also predicted for CbiX, but is distinct from the C-terminal active sites of CbiK and HemH. The biosynthetic model reactions using SirB, Co2+ and uroporphyrin I or protoporphyrin IX as a SHC analogue revealed that SirB showed chelatase activity for uroporphyrin I, but not for protoporphyrin IX. Read More

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http://dx.doi.org/10.1039/c8dt04727hDOI Listing
February 2019

Phenothiazines and phenoxazines: as electron transfer mediators for ferritin iron release.

Dalton Trans 2019 Feb 19. Epub 2019 Feb 19.

Department of Chemistry, National Institute of Technology, Rourkela-769008, Odisha, India.

Intracellular ferritin stores iron as ferrihydrite and releases it for various cellular metabolic activities. The reductive approach, one of the possible mechanisms of iron mobilization from ferritin nanocages, requires electron transfer (ET) from reducing agent(s) to the protein encapsulated iron. In vitro, the rate of ET from the physiological reducing agent, NADH, to mineralized ferritin is very slow resulting in a smaller amount of iron release. Read More

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http://dx.doi.org/10.1039/c8dt04383cDOI Listing
February 2019

Selective synthesis of benzoquinones over Cu(ii)-containing propylsalicylaldimine functionalized mesoporous solid catalysts.

Dalton Trans 2019 Feb 19. Epub 2019 Feb 19.

Department of Chemistry, Faculty of Science, King Khalid University, Abha 61413, Saudi Arabia.

The major product, 2,3,5-trimethyl-1,4-benzophenone (TMB[double bond, length as m-dash]O), was synthesised by an eco-friendly liquid-phase oxidation of 2,3,6-trimethylphenol (TMP-OH) over Cu(ii)-containing propylsalicylaldimine (CSA) functionalized mesoporous solid catalysts, namely, CSASBA-15(0.2), CSASBA-15(0.1) and CSAMCM-41(0. Read More

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http://dx.doi.org/10.1039/c8dt01936cDOI Listing
February 2019

Wayfinding as a Social Activity.

Front Psychol 2019 4;10:142. Epub 2019 Feb 4.

Department of Geography, University of California, Santa Barbara, Santa Barbara, CA, United States.

We discuss the important, but greatly under-researched, topic of the social aspects of human wayfinding during navigation. Wayfinding represents the planning and decision-making component of navigation and is arguably among the most common, real-world domains of both individual and group-level decision making. We highlight the myriad ways that wayfinding by people is not a solitary psychological process but is influenced by the actions of other people, even by their mere presence. Read More

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http://dx.doi.org/10.3389/fpsyg.2019.00142DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6369211PMC
February 2019

Detection of Bacillus anthracis in Animal Tissues using InBios Active Anthrax Detect Rapid Test Lateral Flow Immunoassay.

Lett Appl Microbiol 2019 Feb 18. Epub 2019 Feb 18.

Centers for Disease Control and Prevention, Atlanta, Georgia, 30333.

The Active Anthrax Detect (AAD) Rapid Test lateral flow immunoassay is a point-of-care assay that was under investigational use for detecting Bacillus anthracis capsular polypeptide (polyglutamic acid) in human blood, serum, and plasma. Small sample volumes, rapid results, and no refrigeration required allow for easy use in either the field or laboratory. Although the test was developed for use in suspect cases of human inhalation anthrax, its features also make it a potentially powerful tool for testing suspect animal cases. Read More

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http://doi.wiley.com/10.1111/lam.13134
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http://dx.doi.org/10.1111/lam.13134DOI Listing
February 2019
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A biocompatible redox MRI probe based on a Mn(ii)/Mn(iii) porphyrin.

Dalton Trans 2019 Feb 18. Epub 2019 Feb 18.

Coimbra Chemistry Centre, CQC, University of Coimbra, Rua Larga, 3004-535, Coimbra, Portugal. and Department of Life Sciences, Faculty of Science and Technology, University of Coimbra, Calçada Martim de Freitas, 3000-393, Coimbra, Portugal.

For the development of redox responsive MRI probes based on the MnIII/MnII couple, stable complexation of both reduced and oxidized forms of the metal ion and appropriate tuning of the redox potential in the biologically relevant range are key elements. The water soluble fluorinated Mn-porphyrin derivative Mn-3 satisfies both requirements. In aqueous solutions, it can reversibly switch between MnIII/MnII oxidation states. Read More

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http://dx.doi.org/10.1039/c8dt04775hDOI Listing
February 2019

New Pt→M (M = Ag or Tl) complexes based on anionic cyclometalated Pt(ii) complexes.

Dalton Trans 2019 Feb 18. Epub 2019 Feb 18.

Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Departamento de Química Inorgánica, Universidad de Zaragoza - CSIC, 50009 Zaragoza, Spain.

Anionic cyclometalated complexes (NBu4)[Pt(CNC)X] (X = Cl (1), CN (2), or S-2py (pyridine-2-thiolate) (3); -CNC- = 2,6-di(phen-2-ide)-pyridine) have been used as precursors in the synthesis of heteropolynuclear Pt-Ag or Pt-Tl complexes containing donor-acceptor metal-metal bonds. Their reaction with AgClO4 or [Ag(OClO3)(PPh3)] produces complexes in which the nuclearity and structure seem to be determined by the ability of the ligand X to form bridges between the metals. Thus, the characteristic linear bridging of the cyano ligand leads to the formation of an octanuclear [{Pt(CNC)(μ-CN)}4Ag4] (4) or tetranuclear [{Pt(CNC)(μ-CN)}2{Ag(PPh3)}2] (6) complex, with CN bridges between different "Pt-Ag" units. Read More

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http://dx.doi.org/10.1039/c9dt00121bDOI Listing
February 2019

Emergence of complex chiral coordination clusters {CuNa} by using multiple ligands under oxidizing conditions.

Dalton Trans 2019 Feb 18. Epub 2019 Feb 18.

State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha, 410082, P. R. China.

Two chiral coordination clusters {CuII48Na12}, which can only be revealed by synchrotron single-crystal X-ray diffraction, were assembled unexpectedly from a system resembling the long-studied Fehling's solution. As the intricate structures themselves indicate, the ingenuity of using multiple ligands should inspire new strategies to fabricate new compounds. Read More

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http://dx.doi.org/10.1039/c9dt00209jDOI Listing
February 2019

Efficient and irreversible capture of strontium ions from aqueous solution using metal-organic frameworks with ion trapping groups.

Dalton Trans 2019 Feb 18. Epub 2019 Feb 18.

Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, 64# Mianshan Road, Mianyang, 621900, Sichuan Province, P. R. China.

Efficient and irreversible capture of radioactive nuclides is an important environmental protection task when disposing of nuclear wastewater. This paper uses an "ion trapping" concept to design an efficient adsorbent based on a metal-organic framework (MOF), for removal of radioactive strontium from nuclear wastewater. Two functionalized MOFs were achieved by the introduction of sulfate or oxalate into the pore structure of MOF-808, giving MOF-808-SO4 and MOF-808-C2O4, respectively. Read More

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http://dx.doi.org/10.1039/c9dt00434cDOI Listing
February 2019

Tailored high cycling performance in a solid polymer electrolyte with perovskite-type LiLaTiO nanofibers for all-solid-state lithium ion batteries.

Dalton Trans 2019 Feb 18. Epub 2019 Feb 18.

Department of Materials Science and Technology, City University of Hong Kong, Hong Kong, China.

Solid polymer electrolytes (SPEs) have drawn considerable attention owing to their reliable safety performance, electrochemical stability and exceptional flexibility, which make them superior to conventional liquid electrolytes. Here, we report a novel composite electrolyte which is composed of homogeneously dispersed Li ion-conducting Li0.33La0. Read More

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http://xlink.rsc.org/?DOI=C9DT00074G
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http://dx.doi.org/10.1039/c9dt00074gDOI Listing
February 2019
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Zwitterionic and cationic half-sandwich iridium(iii) ruthenium(ii) complexes bearing sulfonate groups: synthesis, characterization and their different biological activities.

Dalton Trans 2019 Feb 18. Epub 2019 Feb 18.

Institute of Anticancer Agents Development and Theranostic Application, The Key Laboratory of Life-Organic Analysis and Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Department of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China.

Previous studies on the neutral and cationic half-sandwich iridium(iii) and ruthenium(ii) complexes showed that the charge and the substitution pattern of the bidentate ligands, as well as the nature of the accompanying counteranion have a significant effect on their biological activities. In this contribution, a series of zwitterionic and cationic half-sandwich iridium(iii) and ruthenium(ii) complexes containing sulfonate groups have been prepared and characterized. The different locations of counteranions between these two kinds of complexes exert great influence on the cytotoxic activity towards cancer cells. Read More

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http://dx.doi.org/10.1039/c9dt00259fDOI Listing
February 2019