35,851 results match your criteria Dalton transactions Cambridge England : 2003[Journal]


Phosphonium-stibonium and bis-stibonium cations as pnictogen-bonding catalysts for the transfer hydrogenation of quinolines.

Dalton Trans 2019 Apr 18. Epub 2019 Apr 18.

Department of Chemistry, Texas A&M University, College Station, TX 77843, USA.

Bifunctional Lewis acidic group 15 compounds have emerged as appealing platforms for anion sensing and organocatalysis. As part of our interest in the chemistry of these compounds, we have now compared the catalytic properties of [o-(MePPh2)C6H4SbPh2]+ ([3]+), [o-(PPh2)C6H4SbPh3]+ ([4]+), [o-(MePPh2)C6H4SbPh3]2+ ([5]2+), and [o-C6H4(SbMePh2)2]2+ ([6]2+) using the transfer hydrogenation of 2-phenyl-quinoline and 3-bromoquinoline with a Hantzsch ester benchmark reactions. This study, which also involved an evaluation of the catalytic properties of [Ph4Sb]+ and [Ph3MeP]+, shows that antimony cations are generally more active than their phosphorus counterparts and neutral stiboranes. Read More

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http://dx.doi.org/10.1039/c9dt01357aDOI Listing

A new strategy for vascular complications in young people with type 1 diabetes mellitus.

Nat Rev Endocrinol 2019 Apr 17. Epub 2019 Apr 17.

Department of Paediatrics, University of Cambridge, Cambridge, UK.

Diabetes vascular complications, including cardiovascular disease, diabetic nephropathy and retinopathy, have a negative effect on the long-term prognosis of young people with type 1 diabetes mellitus (T1DM). Poor glycaemic control and consequent increased HbA levels are major risk factors for the development of vascular complications. HbA levels are the main focus of current management strategies; however, the recommended target is rarely achieved in adolescents. Read More

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http://dx.doi.org/10.1038/s41574-019-0198-2DOI Listing

Exploring the science, safety, and benefits of air care products: perspectives from the inaugural air care summit.

Inhal Toxicol 2019 Apr 18:1-13. Epub 2019 Apr 18.

q Drug and Poison Information Center , Cincinnati Children's Hospital , Cincinnati , OH , USA.

Seventy-one percent of US households purchase air care products. Air care products span a diverse range of forms, including scented aerosol sprays, pump sprays, diffusers, gels, candles, and plug-ins. These products are used to eliminate indoor malodors and to provide pleasant scent experiences. Read More

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http://dx.doi.org/10.1080/08958378.2019.1597221DOI Listing

Ca-, Sr-, and Ba-Coordination polymers based on anthranilic acid via mechanochemistry.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, D-12489 Berlin, Germany.

Ca-, Sr-, and Ba-Based coordination polymers (CPs) were prepared mechanochemically by milling metal-hydroxide samples with anthranilic acid (oABAH). {[Ca(oABA)2(H2O)3]}n (1) consists of one-dimensional polymeric chains that are further connected by a hydrogen-bonding network. {[Sr(oABA)2(H2O)2]·H2O}n (2) is a one-dimensional CP in which water molecules bridge Sr2+ ions and increase the dimensionality by building an extended network. Read More

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http://xlink.rsc.org/?DOI=C9DT00991D
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http://dx.doi.org/10.1039/c9dt00991dDOI Listing
April 2019
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Endoplasmic reticulum targeted cyclometalated iridium(iii) complexes as efficient photodynamic therapy photosensitizers.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China. and MOE Key Laboratory of Theoretical Organic Chemistry and Functional Molecule, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 400201, P. R. China.

The endoplasmic reticulum (ER) is an indispensable organelle that undertakes the synthesis and export of proteins and membrane lipids. Subtle interferences of the ER redox signaling pathway are very likely to cause ER-stress induced apoptosis. In view of this, we herein present a series of ER-targeted Ir(iii) complexes (Ir1-Ir3) as photodynamic therapy (PDT) photosensitizers with a gradually extended conjugation area in the main ligand, and study the correlation between the conjugation area and PDT performance. Read More

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http://xlink.rsc.org/?DOI=C9DT01072F
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http://dx.doi.org/10.1039/c9dt01072fDOI Listing
April 2019
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Near-infrared-emissive metal-organic frameworks.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Material Science and Engineering, Zhejiang University, Hangzhou 310027, China.

Emerging as a promising novel material, near-infrared-emissive metal-organic frameworks (NIR-emissive MOFs) have drawn much attention for their unique properties. Here, we demonstrate recent advancements in enhancing the NIR emission performance of MOFs as well as their appealing applications in bio-imaging, sensing and barcoding. The present challenges are briefly concluded and the possible future prospects are discussed. Read More

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http://xlink.rsc.org/?DOI=C9DT01197H
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http://dx.doi.org/10.1039/c9dt01197hDOI Listing
April 2019
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Correction: Preconcentration of U(vi) ions on few-layered graphene oxide nanosheets from aqueous solutions.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China.

Correction for 'Preconcentration of U(vi) ions on few-layered graphene oxide nanosheets from aqueous solutions' by Guixia Zhao et al., Dalton Trans., 2012, 41, 6182-6188. Read More

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http://dx.doi.org/10.1039/c9dt90096aDOI Listing

A N,N-dimethylformamide protected rhodium nanocluster with engrossing optical properties and its application.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala-695551, India.

Here, we present the synthesis and characterization of a new N,N-dimethylformamide (DMF) protected rhodium nanocluster (Rh NC) and its interesting optical properties. These small clusters are emissive and exhibit inhomogeneous broadening. The origin of the inhomogeneous broadening and emission behavior were investigated through detailed photo-physical studies. Read More

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http://dx.doi.org/10.1039/c9dt01036jDOI Listing

Equatorial ligand plane perturbations lead to a spin-state change in an iron(iii) porphyrin dimer.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India.

A complete reversal of the spin state of iron(iii) is observed upon a small change to the diporphyrin bridge from ethane to ethene by keeping all other factors intact. Combined analysis using single crystal X-ray structure determination, Mössbauer, variable-temperature magnetic, 1H NMR and EPR studies has confirmed the spin states of iron(iii) complexes both in solid and solution phases. Read More

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http://xlink.rsc.org/?DOI=C9DT01182J
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http://dx.doi.org/10.1039/c9dt01182jDOI Listing
April 2019
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A nuclear permeable Ru(ii)-based photoactivated chemotherapeutic agent towards a series of cancer cells: in vitro and in vivo studies.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.

Ru(ii) polypyridyl complexes which can undergo photo-induced ligand dissociation and DNA covalent binding are considered as potential photoactivated chemotherapeutic (PACT) agents. Herein four pyridine-2-sulfonate (py-SO3-) ligand based Ru(ii) complexes [Ru(N-N)2(py-SO3)]+ (1-4) were synthesized and studied. All the complexes can undergo fast py-SO3- ligand dissociation and DNA covalent binding upon visible light irradiation. Read More

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http://dx.doi.org/10.1039/c9dt00441fDOI Listing

Mercapto-benzothiazolyl based ruthenium(ii) borate complexes: synthesis and reactivity towards various phosphines.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.

The synthesis and reactivity of ruthenium complexes containing an anionic boron based ligand, supported by mercapto-benzothiazolyl heterocycles are presented. Specifically, the reaction of [(η6-p-cymene)Ru{P(OMe)2OR}Cl2], (1a: R = Me; 1b: R = H) with [H2B(mbz)2]- (mbz = 2-mercaptobenzothiazolyl) at room temperature afforded a series of borate complexes, namely [(L)Ru{κ3-H,S,S'-H2B(L)2}P(O)(OMe)(HL)], 2, [Ru{κ3-H,S,S'-H2B(L)2}2], 3 and [(κ2-N,S-L)P(OMe)3Ru{κ3-H,S,S'-H2B(L)2}], 4a; (L = C7H4NS2). The pivotal feature of 2 is the coordination of the Ru centre with a phosphorus atom of secondary phosphine oxide and mercapto-benzothiazolyl ligands. Read More

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http://dx.doi.org/10.1039/c9dt00498jDOI Listing

Strong stacking interactions of metal-chelate rings are caused by substantial electrostatic component.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia. and Department of Chemistry, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar.

Symmetry Adapted Perturbation Theory (SAPT) analysis shows that stacking interactions of metal-chelate rings are stronger than stacking interactions of organic molecules due to much stronger electrostatic interactions caused by the presence of metals. Depending on the ligand, electrostatic component of chelate stacking can be stronger than dispersion component. Read More

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http://dx.doi.org/10.1039/c9dt00182dDOI Listing

Acceptorless dehydrogenative construction of C[double bond, length as m-dash]N and C[double bond, length as m-dash]C bonds through catalytic aza-Wittig and Wittig reactions in the presence of an air-stable ruthenium pincer complex.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

Department of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India.

The construction of C[double bond, length as m-dash]N bonds was achieved by the dehydrogenative coupling of alcohol and azide via aza-Wittig type reaction. The reaction is catalyzed by an acridine-derived ruthenium pincer complex and does not use any oxidant. The present protocol offers a wide substrate scope, including aliphatic, aryl or heteroaryl alcohol/azides. Read More

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http://dx.doi.org/10.1039/c8dt04725aDOI Listing

Genome-wide association analysis and gene set enrichment analysis with SNP data identify genes associated with 305-day milk yield in Holstein dairy cows.

Anim Genet 2019 Apr 17. Epub 2019 Apr 17.

Department of Animal Sciences, Center for Reproductive Biology, Washington State University, PO Box 646310, Pullman, WA, 99164-6310, USA.

Milk production traits, such as 305-day milk yield (305MY), have been under direct selection to improve production in dairy cows. Over the past 50 years, the average milk yield has nearly doubled, and over 56% of the increase is attributable to genetic improvement. As such, additional improvements in milk yield are still possible as new loci are identified. Read More

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http://dx.doi.org/10.1111/age.12792DOI Listing

Evaluation of the chemo- and shape-selective association of a bowl-type dodecavanadate cage with an electron-rich group.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

JST PRESTO, 4-1-8 Honcho, Kawaguchi 332-0012, Japan.

The host-guest interaction between a half spherical-type dodecavanadate (V12) and a neutral molecule guest was evaluated by monitoring the flip of a VO5 unit caused by the presence or absence of a guest in the cavity of V12. In N,N-dimethylformamide (DMF), V12 adopted the guest-free form (V12-free). By the addition of several guest molecules, such as acetonitrile, nitromethane, and dichloromethane, the structural conversion to the guest-inserted form (V12(guest)) was observed with the affinity constants of 137 ± 10 M-1, 0. Read More

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http://dx.doi.org/10.1039/c9dt00462aDOI Listing

Phosphindole fused pyrrolo[3,2-b]pyrroles: a new single-molecule junction for charge transport.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

International Phosphorus Laboratory, International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China.

A new family of phosphindole fused ladder-type heteroacenes with a pyrrolo[3,2-b]pyrrole core were synthesized and characterized, which show good luminescence efficiency, high thermostability and tunable conductance. Read More

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http://dx.doi.org/10.1039/c9dt01299kDOI Listing

Photocatalytic 4-nitrophenol degradation and oxygen evolution reaction in CuO/g-CN composites prepared by deep eutectic solvent-assisted chlorine doping.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

Department of Materials Science and Engineering, National Dong Hwa University, Shoufeng, Hualien-97401, Taiwan, R.O.C.

Anion doping into the oxygen site as a new plan for tuning the physical and chemical properties of metal oxides and adjusting their catalytic behavior has been studied. Herein, we report a Cl- anion-doped CuO (Cl-CuO) preparation method using deep eutectic solvents (DESs) as a green solvent, and the Cl-CuO/g-C3N4 heterostructure was successfully prepared in various weight ratios via a simple ultrasonication and mixing method for the oxygen evolution reaction (OER) in acidic media and the photocatalytic degradation of 4-nitrophenol. Cl- was doped into the CuO crystal lattice, as revealed by the XRD and XPS studies. Read More

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http://dx.doi.org/10.1039/c9dt01046gDOI Listing

Unusual formation of NiCoO@MnO/nickel foam/MnO sandwich as advanced electrodes for hybrid supercapacitors.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, and State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, PR China.

A facile three-step method is designed for large-scale preparation of a NiCo2O4@MnO2/nickel foam/MnO2 sandwich architecture with robust adhesion as an advanced electrode for high-performance supercapacitors. The synthesis contains the hydrothermal reaction of a cobalt-nickel hydroxide precursor on a nickel foam (NF) support and subsequent thermal conversion into spinel mesoporous NiCo2O4 nanowire arrays, followed by a hydrothermal oxidation reaction to synthesize NiCo2O4@MnO2/nickel foam/MnO2 sandwiches. Moreover, the tactics reported in this study enable easy control of the growth of NiCo2O4 on one side of the NF and MnO2 nanosheets on both sides of the NF to obtain novel NiCo2O4@MnO2/nickel foam/MnO2 sandwiches. Read More

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http://dx.doi.org/10.1039/c9dt00696fDOI Listing

Isostructural iron(iii) spin crossover complexes with a tridentate Schiff base-like ligand: X-ray structures and magnetic properties.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

Department of Chemistry, University of Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany.

Here we present two isostructural iron(iii) spin crossover complexes with the same tridentate ligand and perchlorate or tetrafluoroborate as counter ion. Single crystal X-ray structures in the high spin and low spin state were obtained for both complexes. An abrupt spin transition above 100 K is observed with the transition temperature depending on the size of the anion. Read More

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http://dx.doi.org/10.1039/c9dt00846bDOI Listing

AgHPMoO/Ag nanorods/g-CN 1D/2D Z-scheme heterojunction for highly efficient visible-light photocatalysis.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

Key Laboratory of Polyoxometalate Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China.

Reasonably designing Z-scheme photocatalysts has been deemed to be an ideal and prospective way to develop new and highly efficient photocatalytic materials for removing environmental pollutants. Herein, a new type of AgxH3-xPMo12O40/Ag nanorods/g-C3N4 1D/2D Z-scheme photocatalyst (abbr. APM/C3N4) was fabricated by a simple self-assembly procedure. Read More

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http://dx.doi.org/10.1039/c9dt00744jDOI Listing

A 3,4-dimercapto-3-cyclobutene-1,2-dione-chelated ruthenium carbene catalyst for Z-stereoretentive/stereoselective olefin metathesis.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, P. R. China and School of Chemical Engineering & Technology, Tianjin University, Tianjin 300350, P. R. China. and College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.

A ruthenium carbene catalyst chelated with a 3,4-dioxocyclobut-1-ene-1,2-dithiolate ligand was synthesized and its molecular structure was determined by single-crystal X-ray diffraction. The Ru catalyst had excellent catalytic activity with high yields and good Z/E ratios for the ring opening metathesis polymerization (ROMP) of norbornene (yield: 96%/Z/E: 86 : 14) and 1,5-cyclooctadiene (yield: 86%/Z/E: 91 : 9) and for ring opening cross metathesis (ROCM) reactions of norbornene/5-norbornene-2-exo, 3-exo-dimethanol with styrene (yields: 64%-92%/Z/E: 97 : 3-98 : 2) or 4-fluorostyrene (yield: 46%-94%/Z/E: 98 : 2). The catalyst also had high Z-stereoretentivity (91 : 9-98 : 2) for cross-metathesis (CM) reactions of terminal olefins with (Z)-2-butene-1,4-diol. Read More

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http://dx.doi.org/10.1039/c9dt01016eDOI Listing

Coordination design of cadmium ions at the 4-fold axis channel of the apo-ferritin cage.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

School of Life Science and Technology, Tokyo Institute of Technology, Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan.

Spherical protein cages with highly symmetrical structures provide unique environments for the conjugation of metal ions and metal nanoparticles. Ferritin has been widely studied as a template for the coordination of metal ions and metal nanoparticles in fundamental research and applications. However, it remains difficult to design metal coordination sites precisely. Read More

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http://xlink.rsc.org/?DOI=C9DT00609E
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http://dx.doi.org/10.1039/c9dt00609eDOI Listing
April 2019
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Correction: Iridium(iii) polypyridine complexes with a disulfide linker as biological sensors and cytotoxic agents.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P. R. China. and State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P. R. China and Center of Functional Photonics, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P. R. China.

Correction for 'Iridium(iii) polypyridine complexes with a disulfide linker as biological sensors and cytotoxic agents' by Steve Po-Yam Li et al., Dalton Trans., 2019, DOI: 10. Read More

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http://dx.doi.org/10.1039/c9dt90095kDOI Listing

Correction: Controlled synthesis of bifunctional particle-like Mo/Mn-NiS/NF electrocatalyst for highly efficient overall water splitting.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

School of Chemical Engineering and Technology, North University of China, Taiyuan, Shanxi 030051, China.

Correction for 'Controlled synthesis of bifunctional particle-like Mo/Mn-NixSy/NF electrocatalyst for highly efficient overall water splitting' by Yaqiong Gong et al., Dalton Trans., 2019, DOI: 10. Read More

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http://dx.doi.org/10.1039/c9dt90089fDOI Listing

Phosphonate-assisted tetranuclear lanthanide assemblies: observation of the toroidic ground state in the Tb analogue.

Dalton Trans 2019 Apr 17. Epub 2019 Apr 17.

Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India. and Tata Institute of Fundamental Research, Gopanpally, Hyderabad 500 107, India.

The reaction of LnCl3·6H2O with a multidentate flexible Schiff base ligand (LH4), H2O3PtBu and trifluoroacetic acid (tfaH) afforded a series of homometallic tetranuclear complexes, [Ln4(LH2)2(O3PtBu)2(μ2-η1η1tfa)2][2Cl] (Ln = DyIII (1), TbIII (2) and GdIII (3)). The tetranuclear lanthanide core contains two structurally different lanthanide centres, one being in a distorted trigonal dodecahedron geometry and the other in a distorted trigonal prism. Complexes 1-3 were investigated via direct and alternating current (DC and AC) magnetic susceptibility measurements. Read More

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http://dx.doi.org/10.1039/c9dt00592gDOI Listing

Heteronuclear d-d and d-f Ru(ii)/M complexes [M = Gd(iii), Yb(iii), Nd(iii), Zn(ii) or Mn(ii)] of ligands combining phenanthroline and aminocarboxylate binding sites: combined relaxivity, cell imaging and photophysical studies.

Dalton Trans 2019 Apr 16. Epub 2019 Apr 16.

Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK and Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK.

A ligand skeleton combining a 1,10-phenanthroline (phen) binding site and one or two heptadentate N3O4 aminocarboxylate binding sites, connected via alkyne spacers to the phen C3 or C3/C8 positions, has been used to prepare a range of heteronuclear Ru·M and Ru·M2 complexes which have been evaluated for their cell imaging, relaxivity, and photophysical properties. In all cases the phen unit is bound to a {Ru(bipy)2}2+ unit to give a phosphorescent {Ru(bipy)2(phen)}2+ luminophore, and the pendant aminocarboxylate sites are occupied by a secondary metal ion M which is either a lanthanide [Gd(iii), Nd(iii), Yb(iii)] or another d-block ion [Zn(ii), Mn(ii)]. When M = Gd(iii) or Mn(ii) these ions provide the complexes with a high relaxivity for water; in the case of Ru·Gd and Ru·Gd2 the combination of high water relaxivity and 3MLCT phosphorescence from the Ru(ii) unit provides the possibility of two different types of imaging modality in a single molecular probe. Read More

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http://dx.doi.org/10.1039/c9dt00954jDOI Listing
April 2019
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Enhanced 1.5 μm emission of Er-doped multifunctional BiZnOBO microcrystals.

Dalton Trans 2019 Apr 16. Epub 2019 Apr 16.

Faculty of Technical Physics, Poznan University of Technology, Piotrowo 3, 60-965 Poznań, Poland.

The efficiency of the 1.5 μm emission associated with the 4I13/2 → 4I15/2 transition of Er3+ ions of a series of Er3+ and Yb3+/Er3+-doped Bi2ZnOB2O6 microcrystalline powders was investigated. Bi2ZnOB2O6 is an excellent nonlinear optical material as well as a good host matrix for luminescent rare-earth ions. Read More

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http://xlink.rsc.org/?DOI=C9DT00253G
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http://dx.doi.org/10.1039/c9dt00253gDOI Listing
April 2019
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Fe in biosynthesis, translocation, and signal transduction of NO: toward bioinorganic engineering of dinitrosyl iron complexes into NO-delivery scaffolds for tissue engineering.

Dalton Trans 2019 Apr 16. Epub 2019 Apr 16.

Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan.

Iron, the most abundant transition metal ion in humans, participates in the biosynthesis, translocation, signal transduction, and transformation of nitric oxide through its encapsulation in the form of heme, [Fe-S], and [Fe(NO)2] cofactors within a variety of enzymes and proteins. After the review on nitric oxide synthase (NOS) and soluble guanylate cyclase (sGC) for the biosynthesis and detection of NO, in this report, we discuss the natural utilization of the [Fe(NO)2] motif for translocation of endogenous NO and the translational development of synthetic dinitrosyl iron complexes (DNICs) for biomedical applications. A mechanistic study of NO-release and NO-transfer reactivity of structure-characterized DNICs promoted the discovery of cell-penetrating and in vivo NO-delivery reactivity for treatment of cancer and wound healing in diabetes. Read More

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http://dx.doi.org/10.1039/c9dt00777fDOI Listing

A tris-(manganese(iii))corrole-porphyrin-corrole triad: synthesis, characterization and catalytic epoxidation.

Dalton Trans 2019 Apr 16. Epub 2019 Apr 16.

Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal-462066, India.

A homotrimetallic manganese(iii) corrole-porphyrin-corrole triad has been synthesized and structurally characterized. Corrole and porphyrin rings in the free base corrole-porphyrin-corrole triad are found to be roughly perpendicular to each other having a dihedral angle of 83° in the solid state. A dihedral angle of nearly 67° was found between Mn(iii)-corroles and Mn(iii)-porphyrin rings in the manganese triad complex, 1-Mn. Read More

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http://dx.doi.org/10.1039/c9dt00965eDOI Listing

Spin crossover and structural phase transition in homochiral and heterochiral Fe[(pybox)] complexes.

Dalton Trans 2019 Apr 16. Epub 2019 Apr 16.

School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei 230009, China. and State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China.

Spin crossover and structural phase transition in three pairs of homochiral and heterochiral [Fe(pybox)2]2+ diastereomers were investigated through magnetic and crystallographic studies. Herein, we show that the spin transition properties of these compounds are strongly related to the homochiral or heterochiral assembly of the ligands and structural phase transition. Our work demonstrates that chirality is a feasible factor to modulate and influence the molecular geometry and thus the spin-crossover properties of complexes. Read More

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http://dx.doi.org/10.1039/c8dt04893bDOI Listing

Direct intramolecular carbon(sp)-nitrogen(sp) reductive elimination from gold(iii).

Dalton Trans 2019 Apr 16. Epub 2019 Apr 16.

Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506, USA.

The reactivity of bidentate AuIII-Cl species, [(C^N)AuCl2], with a bisphosphine or carbon donor ligands results in reductive elimination. Combined experimental and computational investigations lead to the first evidence of a direct intramolecular C(sp2)-N(sp2) bond formation from a monomeric [(C^N)AuCl2] gold(iii) complex. We show that bidentate ligated Au(iii) systems bypass transmetallation to form C(sp2)-N(sp2) species and NHC-Au-Cl. Read More

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http://xlink.rsc.org/?DOI=C8DT05155K
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http://dx.doi.org/10.1039/c8dt05155kDOI Listing
April 2019
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Sea snake cathelicidin (Hc-cath) exerts a protective effect in mouse models of lung inflammation and infection.

Sci Rep 2019 Apr 15;9(1):6071. Epub 2019 Apr 15.

Airway Innate Immunity Research (AiiR) Group, Centre for Experimental Medicine, The Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7BL, Northern Ireland, UK.

We investigated the anti-inflammatory and antibacterial activities of Hc-cath, a cathelicidin peptide derived from the venom of the sea snake, Hydrophis cyanocyntus, using in vivo models of inflammation and infection. Hc-cath function was evaluated in in vitro, in vivo in the wax moth, Galleria mellonella, and in mouse models of intraperitoneal and respiratory Pseudomonas aeruginosa infection. Hc-Cath downregulated LPS-induced pro-inflammatory responses in macrophages and significantly improved the survival of P. Read More

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http://www.nature.com/articles/s41598-019-42537-8
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http://dx.doi.org/10.1038/s41598-019-42537-8DOI Listing
April 2019
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Distinct Dopamine D₂ Receptor Antagonists Differentially Impact D₂ Receptor Oligomerization.

Int J Mol Sci 2019 Apr 4;20(7). Epub 2019 Apr 4.

Laboratory of Toxicology, Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.

Dopamine D₂ receptors (D₂R) are known to form transient homodimer complexes, of which the increased formation has already been associated with development of schizophrenia. Pharmacological targeting and modulation of the equilibrium of these receptor homodimers might lead to a better understanding of the critical role played by these complexes in physiological and pathological conditions. Whereas agonist addition has shown to prolong the D₂R dimer lifetime and increase the level of dimer formation, the possible influence of D₂R antagonists on dimerization has remained rather unexplored. Read More

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https://www.mdpi.com/1422-0067/20/7/1686
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http://dx.doi.org/10.3390/ijms20071686DOI Listing
April 2019
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Phosphotellurite glass and glass-ceramics with high TeO contents: thermal, structural and optical properties.

Dalton Trans 2019 Apr 15. Epub 2019 Apr 15.

Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, PE, Brazil.

Phosphotellurite based glasses have interesting features such as low characteristic temperatures, high glass forming ability, high thermal stability against crystallization and a broad transparency window from ultraviolet (UV) to near-infrared (NIR), which makes them promising materials for photonic applications. In this work, phosphotellurite binary glasses, having a composition (100 - x)TeO2 - xBa(PO3)2 with x varying from 1 to 20 mol%, were synthesized by the conventional melt-quenching method in covered gold crucibles under air. Optical, physical and structural properties of the new glass samples were investigated by differential scanning calorimetry, X-ray diffraction, Raman spectroscopy, transmission electron microscopy, linear optical absorption from UV to NIR, IR transmittance, and optical limiting experiments. Read More

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http://dx.doi.org/10.1039/c9dt00691eDOI Listing

Cobalt amino-bis(phenolate) complexes for coupling and copolymerization of epoxides with carbon dioxide.

Dalton Trans 2019 Apr 15. Epub 2019 Apr 15.

Department of Chemistry, Memorial University of Newfoundland, St. John's, NL, Canada A1B 3X7.

Cobalt(ii) and (iii) complexes bearing tetradentate amino-bis(phenolate) ligands containing either pendent dimethylaminoethylene or pyridyl groups and phenolates bearing electron-donating alkyl or electron-withdrawing chloro substituents were synthesized. The compounds were characterized by mass spectrometry, elemental analysis and NMR for diamagnetic compounds. The influence of the electron donating ability and steric demand of the ligands on CO2/epoxide ring-opening copolymerization (ROCOP) and coupling reactions was investigated. Read More

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http://dx.doi.org/10.1039/c9dt00996eDOI Listing

Evaluation of dicopper azacryptand complexes in aqueous CuAAC reactions and their tolerance toward biological thiols.

Dalton Trans 2019 Apr 15. Epub 2019 Apr 15.

Department of Chemistry, University of Houston, 4800 Calhoun Rd., Houston, TX 77004, USA.

A series of dicopper azacryptand complexes was evaluated in copper-catalysed azide-alkyne cycloaddition (CuAAC) in water at 37 °C. It was found that they showed high activity at concentrations as low as 5 μM. These dinuclear catalysts were more susceptible toward inhibition by cysteine rather than glutathione under the conditions tested. Read More

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http://dx.doi.org/10.1039/c9dt00724eDOI Listing

Copper(ii) triflate-mediated synthesis of functionalized silsesquioxanes via dehydrogenative coupling of POSS silanols with hydrosilanes.

Dalton Trans 2019 Apr 15. Epub 2019 Apr 15.

Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614 Poznań, Poland.

In light of the fact that the design of new catalytic routes leading to functionalized silsesquioxanes is currently of high relevance; herein we report a novel, highly effective and convenient catalytic approach for the modification of silsesquioxanes. We present a dehydrogenative coupling reaction of completely as well as incompletely condensed POSS silanols with a wide range of commercially available hydrosilanes mediated by inexpensive copper(ii) trifluoromethanesulfonate. This research also includes mechanistic studies for this process. Read More

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http://dx.doi.org/10.1039/c9dt01135hDOI Listing

Breast Screening Utilization and Cost Sharing Among Employed Insured Women Following the Affordable Care Act: Impact of Race and Income.

J Womens Health (Larchmt) 2019 Apr 13. Epub 2019 Apr 13.

2 Program for Women's Health Effectiveness Research, University of Michigan, Ann Arbor, Michigan.

Introduction: We assessed changes in screening mammography cost sharing and utilization before and after the Affordable Care Act (ACA) and the revised U.S. Preventive Services Task Force (USPSTF) recommendations by race and income. Read More

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http://dx.doi.org/10.1089/jwh.2018.7403DOI Listing

Reversible Al ion insertion into tungsten trioxide (WO) for aqueous aluminum-ion batteries.

Dalton Trans 2019 Apr 15. Epub 2019 Apr 15.

Department of Physics, Tezpur University, Assam, India784028.

Can electrochemical Al3+ ions be reversibly intercalated in tungsten trioxide (WO3) in aqueous electrolytes? Here, we address this particular question and demystify that Al3+ ions can indeed be intercalated and deintercalated in WO3 in certain Al3+ ion conducting aqueous electrolytes. Read More

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http://dx.doi.org/10.1039/c9dt00844fDOI Listing

Efficient sky-blue OLEDs with extremely low efficiency roll-off based on stable iridium complexes with a bis(diphenylphorothioyl)amide ligand.

Dalton Trans 2019 Apr 15. Epub 2019 Apr 15.

State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China. and MaAnShan High-Tech Research Institute of Nanjing University, MaAnShan, 238200, P. R. China.

The lack of efficient blue-emitting materials is one of the most important issues faced when extending the application of organic light-emitting diodes (OLEDs). Therefore, in this study, the ancillary ligand bis(diphenylphorothioyl)amide (Stpip) was utilized in iridium(iii) complexes with 2-(2,4-difluorophenyl)pyridine (dfppy) and 2-(2,4-difluorophenyl)pyrimidine (dfppm) as the main ligands, respectively. The two complexes, (dfppy)2Ir(Stpip) and (dfppm)2Ir(Stpip), exhibit sky-blue emission peaks at 466 and 474 nm with photoluminescence quantum yields of 12% and 89%, respectively. Read More

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http://xlink.rsc.org/?DOI=C9DT00298G
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http://dx.doi.org/10.1039/c9dt00298gDOI Listing
April 2019
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Bipyridine-based iridium(iii) triplet emitters for organic light-emitting diodes (OLEDs): application and impact of phenyl substitution at the 5'-position of the N-coordinating pyridine ring.

Dalton Trans 2019 Apr 15. Epub 2019 Apr 15.

Division of Science Education, Kangwon National University, Chuncheon 24341, Republic of Korea.

Three blue phosphorescent homoleptic iridium(iii) complexes based on a bipyridine ligand were synthesized. The structures of these Ir(C^N)3 analogues were determined by single-crystal X-ray diffraction analysis. Two geometrical isomers, facial and meridional, formed as the major products, and the ratio of the products depended on the substituents. Read More

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http://dx.doi.org/10.1039/c9dt00596jDOI Listing

Controllable access to P-functional [3]ferrocenophane and [4]ferrocenophane frameworks.

Dalton Trans 2019 Apr 15. Epub 2019 Apr 15.

Institut für Anorganische Chemie, University of Stuttgart, Pfaffenwaldring 55, 70550 Stuttgart, Germany.

Condensation of secondary 1,1'-diaminoferrocenes with phosphorus trihalides (PCl3 or PBr3) yielded either P-halo-1,3-diaza-2-phospha[3]ferrocenophanes or 1,1'-diaminoferrocenediyl-bis(dichlorophosphines), respectively. The latter provide controlled access to both [3]- and [4]ferrocene frameworks. Thus, reductive coupling with magnesium gave diaza-diphospha[4]ferrocenophane-annelated tetraphosphetanes, while a reaction with LiNMe2 produced a P-chloro-diazaphospha[3]ferrocenophane. Read More

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http://dx.doi.org/10.1039/c9dt00892fDOI Listing

The ability of the NiSOD binding loop to chelate zinc(ii): the role of the terminal amino group in the enzymatic functions.

Dalton Trans 2019 Apr 15. Epub 2019 Apr 15.

Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032, Debrecen, Hungary and MTA-DE Redox and Homogeneous Catalytic Reaction Mechanisms Research Group, University of Debrecen, H-4032, Debrecen, Hungary.

Equilibrium and detailed spectroscopic characterization of zinc(ii) complexes with NiSOD binding loop and their related model fragments are reported in the whole investigated pH-range. The zinc(ii) complexes of L1 (HCDLPCGVY-NH2), L2 (Ac-HCDLPCGVY-NH2) and L3 (HCDLACGVY-NH2) and the nickel(ii) and zinc(ii) complexes of L4 (HCDLPCG-NH2) were studied by pH-potentiometric and several spectroscopic methods. The results indicated that the macrochelate coordinated zinc(ii) complexes are dominant in a whole pH-range and the side chain donors of the peptides are involved in the metal binding. Read More

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http://dx.doi.org/10.1039/c9dt01015gDOI Listing

CO oxidation over the polyoxometalate-supported single-atom catalysts M/POM (Fe, Co, Mn, Ru, Rh, Os, Ir, and Pt; POM = [PWO]): a computational study on the activation of surface oxygen species.

Dalton Trans 2019 Apr 15. Epub 2019 Apr 15.

College of Chemical Engineering, Northeast Electric Power University, Jilin City, 132012, P. R. China.

The discrete anionic structure of polyoxometalates (POMs) at the interface is more like a separate small "island", which effectively prevents the diffusion of single atoms and prohibits the agglomeration and generation of metal particles; thus, POMs can enhance the sintering-resistant behavior and increase metal loading on the surface of single-atom catalysts (SACs). To explore the catalytic performance of POM-supported SACs for CO oxidation, we employed density functional theory (DFT) calculations to gain an understanding of some important aspects, including the CO adsorption, the formation of oxygen vacancies, and the activity of the surface oxygen species, of the catalytic system. Compared to previous theoretical studies, in which the catalytic behavior of POMs has been investigated based on the anionic unit with the highest negative charge, herein, we have constructed a model of the POM-supported SACs, which are neutral species. Read More

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http://dx.doi.org/10.1039/c8dt03843kDOI Listing

Hepatitis E: an underestimated emerging threat.

Ther Adv Infect Dis 2019 Jan-Dec;6:2049936119837162. Epub 2019 Apr 3.

Truro, Cornwall, UK.

Hepatitis E virus (HEV) is the most common cause of viral hepatitis in the world. It is estimated that millions of people are infected every year, resulting in tens of thousands of deaths. However, these estimates do not include industrialized regions and are based on studies which employ assays now known to have inferior sensitivity. Read More

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http://dx.doi.org/10.1177/2049936119837162DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6448100PMC
April 2019
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Gold@Prussian blue analogue core-shell nanoheterostructures: their optical and magnetic properties.

Dalton Trans 2019 Apr 15. Epub 2019 Apr 15.

Institut Charles Gerhardt Montpellier, UMR 5253, Ingénierie Moléculaire et Nano-Objets, Université de Montpellier, ENSCM, CNRS, Place E. Bataillon, 34095 Montpellier Cedex 5, France.

Au@Prussian-Blue Analogue (PBA) shell nanoheterostructures are multifunctional nano-objects combining optical properties (surface plasmon resonance) of the Au core and magnetic properties of the PBA shell. We report in this article a series of new Au core@PBA shell nano-objects with different PBA shells: Au@K/Co/[FeII(CN)6] (2) and Au@K/Ni/[CrIII(CN)6]:[FeII(CN)6] (3) single PBA shell, as well as Au@K/Ni/[FeII(CN)6]@K/Ni/[FeIII(CN)6] (4) double PBA shell and Au@K/Ni/[FeII(CN)6]@K/Ni/[FeIII(CN)6]@K/Ni/[CrIII(CN)6] (5) triple PBA shell systems. The position and intensity of the Au SPR band, as well as the magnetic behaviour of the nanoheterostructures, are strongly affected by the shell composition and its thickness. Read More

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http://dx.doi.org/10.1039/c9dt00141gDOI Listing

Syntheses, structures and catalytic properties of Evans-Showell-type polyoxometalate-based 3D metal-organic complexes constructed from the semi-rigid bis(pyridylformyl)piperazine ligand and transition metals.

Dalton Trans 2019 Apr 15. Epub 2019 Apr 15.

Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, Zhengzhou 450002, PR China.

Herein, two novel Evans-Showell-type polyoxometalate (POM)-based metal-organic complexes, namely, {[Cu(L)(H2O)3][Cu(L)0.5(H2O)][Cu(L)0.5(H2O)4][Co2Mo10H4O38]}·5H2O (1) and [(H2L)0. Read More

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http://dx.doi.org/10.1039/c9dt00499hDOI Listing

Nexilin is a New Component of Junctional Membrane Complexes Required for Cardiac T-Tubule Formation.

Circulation 2019 Apr 15. Epub 2019 Apr 15.

Department of Medicine, University of California San Diego, La Jolla, CA.

Background: Membrane contact sites (MCS) are fundamental for transmission and translation of signals in multicellular organisms. A prime example is junctional membrane complexes (JMC) in the cardiac dyads, where T-tubules are juxtaposed to the sarcoplasmic reticulum (SR). T-tubule uncoupling and remodeling are well-known features of cardiac disease and heart failure. Read More

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http://dx.doi.org/10.1161/CIRCULATIONAHA.119.039751DOI Listing

Flutracking weekly online community survey of influenza-like illness annual report, 2016

Commun Dis Intell (2018) 2019 Apr 15;43. Epub 2019 Apr 15.

Hunter New England Population Health, Wallsend, New South Wales

Flutracking is a national online community influenza-like illness (ILI) surveillance system that monitors weekly ILI attack rates and seriousness of disease in the Australian community. This article reports on the 2016 findings. From 2015 to 2016 there was an 11. Read More

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Plasmonic IQ modulators with attojoule per bit electrical energy consumption.

Nat Commun 2019 Apr 12;10(1):1694. Epub 2019 Apr 12.

Institute of Electromagnetic Fields (IEF), ETH Zurich, 8092, Zurich, Switzerland.

Coherent optical communications provides the largest data transmission capacity with the highest spectral efficiency and therefore has a remarkable potential to satisfy today's ever-growing bandwidth demands. It relies on so-called in-phase/quadrature (IQ) electro-optic modulators that encode information on both the amplitude and the phase of light. Ideally, such IQ modulators should offer energy-efficient operation and a most compact footprint, which would allow high-density integration and high spatial parallelism. Read More

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http://www.nature.com/articles/s41467-019-09724-7
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http://dx.doi.org/10.1038/s41467-019-09724-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6461703PMC
April 2019
2 Reads