41,104 results match your criteria Chemical Communications [Journal]


Non-reducible disulfide bond replacement implies that disulfide exchange is not required for hepcidin-ferroportin interaction.

Chem Commun (Camb) 2019 Feb 14. Epub 2019 Feb 14.

School of Life Science, Institute of Health Science and Technology, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, P. R. China.

Previous studies have led to opposing hypotheses about the requirement of intermolecular disulfide exchange in the binding of the iron regulatory peptide hepcidin to its receptor ferroportin. To clarify this issue, we used the diaminodiacid approach to replace the disulfide bonds in hepcidin with non-reducible thioether bonds. Our results implied that disulfide exchange is not required for the interaction between hepcidin and ferroportin. Read More

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http://dx.doi.org/10.1039/c9cc00328bDOI Listing
February 2019

A rhodium-catalysed Sonogashira-type coupling exploiting C-S functionalisation: orthogonality with palladium-catalysed variants.

Chem Commun (Camb) 2019 Feb 14. Epub 2019 Feb 14.

Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK.

This report concerns the development of an efficient Sonogashira-type coupling of arylmethylsulfides and terminal alkynes to generate aryl alkyne motifs. Orthogonal reactivity between traditional Pd catalysts, and the Rh catalysts employed, results in the ability to selectively activate either the C-S bond or C-X bond through catalyst choice. The Rh-bisphosphine catalyst has further been shown to be able to effect a hydroacylation-Sonogashira tandem sequence, and in combination with further onward reactions has been used in the synthesis of heterocycles and polycyclic systems. Read More

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http://dx.doi.org/10.1039/c9cc00092eDOI Listing
February 2019

Environmentally responsive photonic polymers.

Chem Commun (Camb) 2019 Feb 14. Epub 2019 Feb 14.

Stimuli-responsive Functional Materials and Devices, Department of Chemical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands. and SCNU-TUE Joint Laboratory of Device Integrated Responsive Materials (DIRM), Guangzhou Higher Education Mega Center, South China Normal University, 510006 Guangzhou, China and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.

Stimulus-responsive photonic polymer materials that change their reflection colour as function of environmental stimuli such as temperature, humidity and light, are attractive for various applications (e.g. sensors, smart windows and communication). Read More

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http://dx.doi.org/10.1039/c8cc09672dDOI Listing
February 2019

The cone-tetranitrocalix[4]arene tetraradical tetraanion as an electrochemically generated ligand for heavier alkali metal cations.

Chem Commun (Camb) 2019 Feb 14. Epub 2019 Feb 14.

J. Heyrovský Institute of Physical Chemistry AS CR, Dept. of Molecular Electrochemistry and Catalysis, Dolejškova 2155/3, 128 23 Prague 8, Czech Republic.

Four-electron electrochemical reduction of the cone-tetranitrocalix[4]arene in DMF results in the stable tetraradical tetraanion. The positive shift of the reduction potential of the title compound with an increasing concentration of alkali metal ions is caused by complex formation. The tetranitrocalix[4]arene thus represents an electrochemically generated ligand - a promising receptor/sensor - for alkali metal ions. Read More

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http://xlink.rsc.org/?DOI=C8CC09662G
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http://dx.doi.org/10.1039/c8cc09662gDOI Listing
February 2019
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BaCoO: a new highly oxygen deficient perovskite-related phase with unusual Co coordination obtained by high temperature reaction with short reaction times.

Chem Commun (Camb) 2019 Feb 14. Epub 2019 Feb 14.

Technische Universität Darmstadt, Institut für Materialwissenschaft, Fachgebiet Material design durch Synthese, Alarich-Weiss-Straße 2, 64287 Darmstadt, Germany. and Karlsruher Institut für Technologie, Institut für Nanotechnologie, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein Leopoldshafen, Germany.

A new highly oxygen deficient metastable modification of perovskite-related BaCoO2+δ (δ ∼ 0.01-0.02) has been prepared using high temperature reactions with short heating times. Read More

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http://dx.doi.org/10.1039/c8cc09532aDOI Listing
February 2019

Visible-light-induced metathesis reaction between diselenide and ditelluride.

Chem Commun (Camb) 2019 Feb 14. Epub 2019 Feb 14.

Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China.

The Se-Te bond was prepared by a metathesis reaction between diselenides and ditellurides, which could be manipulated with the presence or absence of visible light. Additionally, the apparent activation energy of the exchange process was measured to be only 28.01 kJ mol-1, explaining the high reactivity and sensitivity to light. Read More

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http://dx.doi.org/10.1039/c9cc00252aDOI Listing
February 2019

Silver-catalyzed decarboxylative radical cascade cyclization toward benzimidazo[2,1-a]isoquinolin-6(5H)-ones.

Chem Commun (Camb) 2019 Feb 14. Epub 2019 Feb 14.

College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.

A simple and efficient decarboxylative radical addition/cyclization strategy was developed, by which a wide range of benzimidazo[2,1-a]isoquinoline-6(5H)-ones were prepared in one-pot via reaction of functionalized 2-arylbenzoimidazoles and carboxylic acids in the presence of K2S2O8/AgNO3 under mild reaction conditions. Read More

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http://dx.doi.org/10.1039/c8cc10243kDOI Listing
February 2019

Unusual ligand rearrangement: from N-phosphinoguanidinato to phosphinimine-amidinato compounds.

Chem Commun (Camb) 2019 Feb 14. Epub 2019 Feb 14.

Departamento de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain.

Novel N-phosphinoguanidines (HNiPr)(Ph2PNiPr)C(NAr) (Ar = 2,6-iPr2C6H3, 2,4,6-Me3C6H2) react with AlMe3 to afford phosphinimine-amidinato derivatives, via an unprecedented rearrangement of an initial N-phosphinoguanidinato intermediate. A reasonable mechanism has been proposed for this transformation, supported by DFT calculations, involving carbodiimide de-insertion followed by a [3+2] cycloaddition. Read More

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http://dx.doi.org/10.1039/c9cc00432gDOI Listing
February 2019

In situ synthesis of a high-performance bismuth oxide based composite cathode for low temperature solid oxide fuel cells.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

Department of Mechanical Engineering, University of South Carolina, Columbia, 29208, USA.

Here, we report the design and fabrication of a cost-effective and high-performance composite (Bi0.75Y0.25)0. Read More

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http://dx.doi.org/10.1039/c9cc00442dDOI Listing
February 2019

Nickel-catalyzed alkyl-alkyl cross-coupling reactions of non-activated secondary alkyl bromides with aldehydes as alkyl carbanion equivalents.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

Shanghai Key Laboratory of Green Chemistry and Chemical Process, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, China.

A novel nickel-catalyzed alkyl-alkyl cross coupling of non-activated secondary alkyl bromides with aldehydes via hydrazone intermediates has been developed. Aldehydes as alkyl carbanion equivalents replace traditional organometallic reagents. This coupling occurs on the carbon of the hydrazone rather than the nitrogen. Read More

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http://dx.doi.org/10.1039/c9cc00307jDOI Listing
February 2019

Cryo-assisted exfoliation of atomically thin 2D SbSe nanosheets for photo-induced theranostics.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China.

A liquid-phase exfoliation approach, combined with cryogenic fracturing and bath/probe sonication, is developed to prepare atomically thin 2D anisotropic Sb2Se3 nanosheets for simultaneous photoacoustic imaging and photothermal therapy. Read More

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http://dx.doi.org/10.1039/c9cc00576eDOI Listing
February 2019

Enhancing selectivity of cation exchange with anion receptors.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831-6119, USA.

We introduce a new supramolecular strategy where an anion receptor modifies the selectivity ligands for cations. This is demonstrated by combining the classic anion receptor calix[4]pyrrole (C4P) and a phenolic ligand, which leads to remarkable enhancement in selectivity for Cs+ over Na+. Crystal structures and molecular simulations confirmed the persistent formation of ion-pair C4P-Cs+-phenolate complexes, while the smaller Na+ ion cannot efficiently interact. Read More

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http://dx.doi.org/10.1039/c9cc00287aDOI Listing
February 2019

A visible-light-induced oxidative cyclization of N-propargylanilines with sulfinic acids to 3-sulfonated quinoline derivatives without external photocatalysts.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.

A visible-light-induced oxidative cyclization of N-propargyl anilines with sulfinic acids was developed under external photocatalyst-free conditions. The reaction provides a straightforward route to 3-sulfonated quinoline derivatives with good functional group tolerance, excellent yields and high regio-selectivity. Read More

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http://dx.doi.org/10.1039/c8cc10235jDOI Listing
February 2019

Aldehyde effect and ligand discovery in Ru-catalyzed dehydrogenative cross-coupling of alcohols to esters.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, China.

The presence of different aldehydes is found to have a significant influence on the catalytic performance when using PN(H)P type ligands for dehydrogenation of alcohols. Accordingly, hybrid multi-dentate ligands were discovered based on an oxygen-transfer alkylation of PNP ligands by aldehydes. The relevant Ru-PNN(PO) system provided the desired unsymmetrical esters in good yields via acceptorless dehydrogenation of alcohols. Read More

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http://dx.doi.org/10.1039/c8cc10315aDOI Listing
February 2019

Hydrothermal synthesis of novel rhombic dodecahedral SnS nanocrystals for highly efficient photothermal therapy.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.

Novel rhombic dodecahedral SnS nanocrystals were prepared via a facile one-pot hydrothermal method for the first time, which exhibit a large extinction coefficient of 36.8 L g-1 cm-1 and a high photothermal conversion efficiency of 39.4% under irradiation with a 785 nm laser. Read More

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http://dx.doi.org/10.1039/c8cc09733jDOI Listing
February 2019

Facile fabrication of highly efficient ETL-free perovskite solar cells with 20% efficiency by defect passivation and interface engineering.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advance Technology of Ceramics, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, P. R. China and School of Materials Science and Engineering, Nanchang University, Nanchang 330031, Jiangxi, P. R. China.

Tetramethylammonium hydroxide (TMAH) is employed to modify the surface and electrical properties of fluorine-doped tin oxide (FTO) electrodes in perovskite solar cells. Synchronously, owing to the flow of unbound TMA+ ions into the perovskite, the trap density of the perovskite overlayer is largely reduced. Conductivity of the grain boundaries in the perovskite layer is also greatly increased. Read More

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http://dx.doi.org/10.1039/c9cc00312fDOI Listing
February 2019

PROTACs suppression of CDK4/6, crucial kinases for cell cycle regulation in cancer.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

Department of Chemistry, Texas A & M University, Box 30012, College Station, TX 77841-3012, USA.

PROTACs based on two selective, FDA approved, CDK4/6 inhibitors were formed. One of them, based on palbociclib, potently initiates degradation of these CDK proteins, and suppresses phosphorylation of retinoblastoma protein (Rb) leading to cell cycle arrest. These PROTACs are active at nanomolar concentrations, and appear to be the first for CDK4/6. Read More

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http://dx.doi.org/10.1039/c9cc00163hDOI Listing
February 2019

Photocatalytic reductive radical-radical coupling of N,N'-cyclicazomethine imines with difluorobromo derivatives.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China. and Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Central South University, Changsha 410083, P. R. China.

A visible-light-induced difluoroalkylation of N,N'-cyclicazomethine imine was successfully realized through a novel photoredox radical-radical cross-coupling reaction. This developed protocol exhibits high functional group tolerance and affords a variety of difluorinated 3-pyrazolidinone scaffolds. Extensive mechanistic investigations have been undertaken, well revealing the involvement of a reductive radical-radical coupling pathway. Read More

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http://dx.doi.org/10.1039/c8cc09385gDOI Listing
February 2019

Bridging exosome and liposome through zirconium-phosphate coordination chemistry: a new method for exosome detection.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, 210023, P. R. China. and Center for Molecular Recognition and Biosensing, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China.

We have proposed a new exosomes-zirconium-liposomes sandwich structure to detect exosomes by using zirconium-phosphate coordination chemistry. The combined use of the intrinsic property of phosphate in both exosomes and liposomes as well as zirconium ions can endow the method lower cost, no modified label, simplicity and high efficiency. Read More

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http://dx.doi.org/10.1039/c9cc00220kDOI Listing
February 2019

Hybrid nanostructures of pit-rich TiO nanocrystals with Ru loading and N doping for enhanced solar water splitting.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

Institute for Advanced Interdisciplinary Research (iAIR), and School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China. and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P. R. China.

A general method was elaborately developed for the synthesis of pit-rich metal oxide (TiO2, ZrO2 and HfO2) nanocrystals with metallocene dichlorides as precursors. Benefiting from the synergies in numerous pits, Schottky junctions and nitrogen doping, the hybrid nanostructures of pit-rich TiO2 nanocrystals with Ru loading and N doping exhibited enhanced solar water splitting. Read More

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http://dx.doi.org/10.1039/c8cc10093dDOI Listing
February 2019

Cubic SnGe nanoalloys: beyond thermodynamic composition limit.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

Center for Integrated Nanotechnologies, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USA.

Tin-germanium alloys are increasingly of interest as optoelectronic and thermoelectric materials as well as materials for Li/Na ion battery electrodes. However, the lattice incompatibility of bulk Sn and Ge makes creating such alloys challenging. By exploiting the unique strain tolerance of nanosized crystals, we have developed a facile synthetic method for homogeneous SnxGe1-x alloy nanocrystals with composition varying from essentially pure Ge to 95% Sn while still maintaining the cubic structure. Read More

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http://dx.doi.org/10.1039/c8cc07570kDOI Listing
February 2019

Liquid phase exfoliation of carbonate-intercalated layered double hydroxides.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, 46980, Paterna, Spain.

Direct exfoliation of a carbonate layered double hydroxide (LDH) has been achieved by using a novel horn-probe sonic tip, avoiding the development of time-consuming anion-exchange reactions. The most suitable solvents were chosen based on the Hildebrand solubility parameters and the thickness of the exfoliated nanosheets confirmed unambiguously the successful delamination. Read More

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http://dx.doi.org/10.1039/c9cc00197bDOI Listing
February 2019

Versatile fluorophores for bioimaging applications: π-expanded naphthalimide derivatives with skeletal and appendage diversity.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

BIOCEV, First Faculty of Medicine, Charles University, Průmyslová 595, 252 50 Vestec, Czech Republic. and Department of Analytical Chemistry, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic.

Four novel fluorescent cores bearing a transformable functional group based on a π-expanded naphthalimide including a fused pyranone or furan ring have been prepared. Fluorescent probes LysoSers 13-16 for lysosomal targeting have been tested. Co-localization with a commercial lysosome specific marker confirmed that the LysoSers labeled the lysosomal compartment with high selectivity. Read More

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http://dx.doi.org/10.1039/c8cc09638dDOI Listing
February 2019

Two-dimensional SERS encoding method for on-bead peptide sequencing in high-throughput bioanalysis.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

Department of Chemistry Education, Seoul National University, Seoul, 08826, Republic of Korea. and Center for Educational Research, Seoul National University, Seoul 08826, Republic of Korea.

We developed a ready-to-read on-bead peptide encoding method for high-throughput screening bioassays. With two-dimensional surface-enhanced Raman scattering nano-identifiers (2D-SERS IDs) which are concurrently labelled with two SERS codes (coupling steps and kinds of amino acid), we could possibly generate more than 10 trillion codes with only 30 Raman label compounds. Read More

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http://dx.doi.org/10.1039/c8cc10224dDOI Listing
February 2019

Tuning octahedral tilts and the polar nature of A-site deficient perovskites.

Chem Commun (Camb) 2019 Feb 13. Epub 2019 Feb 13.

School of Physical Sciences, University of Kent, Canterbury, Kent, CT2 7NH, UK.

Herein we highlight the ability to tune the structural chemistry of A-site deficient perovskite materials Ln1/3NbO3. Computational studies explore the balance between proper and hybrid-improper mechanisms for polar behaviour in these systems. Read More

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http://dx.doi.org/10.1039/c8cc10126dDOI Listing
February 2019

Metal organic framework derived NbO@C nanoparticles grown on reduced graphene oxide for high-energy lithium ion capacitors.

Chem Commun (Camb) 2019 Feb 12. Epub 2019 Feb 12.

Key Laboratory for Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Ministry of Education, Nanjing 210094, Jiangsu, China.

Nb2O5@carbon/reduced graphene oxide (M-Nb2O5@C/rGO) composites are fabricated by annealing the precursor of graphene oxide supported Nb-based metal organic frameworks for the first time. The lithium ion capacitor using M-Nb2O5@C/rGO as the anode and activated carbon as the cathode delivers a high energy density of 71.5 W h kg-1 and excellent cycling stability. Read More

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http://xlink.rsc.org/?DOI=C9CC00387H
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http://dx.doi.org/10.1039/c9cc00387hDOI Listing
February 2019
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A lysosome-targeting dual-functional fluorescent probe for imaging intracellular viscosity and beta-amyloid.

Chem Commun (Camb) 2019 Feb 12. Epub 2019 Feb 12.

School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, P. R. China and Guangdong Provincial Engineering and Technology Research Center of Biopharmaceuticals, South China University of Technology, Guangzhou 510006, P. R. China and Joint International Research Laboratory of Synthetic Biology and Medicine, South China University of Technology, Guangzhou 510006, P. R. China.

A lysosome-targeting dual-functional fluorescent probe was rationally designed and developed for imaging intracellular lysosomal viscosity and beta-amyloid. More importantly, the real-time tracking of the dynamic movement of lysosomes, as vesicle structures, has been achieved using Lyso-MC. Read More

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http://dx.doi.org/10.1039/c9cc00113aDOI Listing
February 2019

Mitochondria targeted and NADH triggered photodynamic activity of chloromethyl modified Ru(ii) complexes under hypoxic conditions.

Chem Commun (Camb) 2019 Feb 12. Epub 2019 Feb 12.

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

Three chloromethyl-modified Ru(ii) complexes were designed and synthesized as mitochondria targeting photosensitizers, which can generate carbon radicals in the presence of NADH under visible light irradiation, cause DNA cleavage and covalent binding in Ar-saturated solutions, and lead to apoptosis of human ovarian carcinoma SKOV-3 cells under hypoxic conditions (3% O2), demonstrating a new mode of type I mechanism to overcome the limitation of hypoxia in photodynamic therapy (PDT). Read More

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http://dx.doi.org/10.1039/c8cc09186bDOI Listing
February 2019

Improved synthesis of β-ketoenamine-linked covalent organic frameworks via monomer exchange reactions.

Chem Commun (Camb) 2019 Feb 12. Epub 2019 Feb 12.

Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.

β-Ketoenamine-linked covalent organic frameworks (COFs) offer excellent structural versatility and outstanding aqueous stability, but their stability complicates obtaining samples with high crystallinity and surface areas. In contrast, imine-linked COFs are often isolated with superior materials quality. Here we synthesize several β-ketoenamine-linked COFs, including two unreported structures, with unmatched crystallinity and high surface areas by preparing the corresponding imine-linked COF and exchanging its triformylbenzene monomers with triformylphloroglucinol. Read More

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http://dx.doi.org/10.1039/c8cc08957dDOI Listing
February 2019

Biomass-derived oxygen-doped hollow carbon microtubes for electrocatalytic N-to-NH fixation under ambient conditions.

Chem Commun (Camb) 2019 Feb 12. Epub 2019 Feb 12.

School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China.

Electrocatalytic N2 reduction as an alternative approach to the energy-intensive and large CO2-producing Haber-Bosch process for NH3 synthesis under mild conditions has attracted extensive attention. Current research efforts on N2 reduction have mainly focused on metal-based catalysts, but metal-free alternatives can avoid the issue of metal ion release. In this work, oxygen-doped hollow carbon microtubes (O-KFCNTs) derived from natural kapok fibers are reported as a metal-free NRR electrocatalyst for N2-to-NH3 conversion with excellent selectivity. Read More

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http://dx.doi.org/10.1039/c8cc09867kDOI Listing
February 2019

A catecholamine neurotransmitter: epinephrine as a CO wet scrubbing agent.

Chem Commun (Camb) 2019 Feb 12. Epub 2019 Feb 12.

Department of Chemistry, Faculty of Science, The University of Jordan, Amman 11942, Jordan.

Bio-renewables are emerging as potential materials for CO2 sorption. Epinephrine is employed as a green scrubbing agent for CO2 capturing through the formation of a metal carbamate as proved by 1H, 13C and 1H-15N NMR and ex situ ATR-FTIR spectroscopy, as well as supported by quantum-chemical calculations. Read More

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http://dx.doi.org/10.1039/c8cc09572hDOI Listing
February 2019

DNA aptamer assemblies as fibroblast growth factor mimics and their application in stem cell culture.

Chem Commun (Camb) 2019 Feb 12. Epub 2019 Feb 12.

Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan. and Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.

Replacing expensive and thermally unstable growth factors with synthetic alternatives has been an important issue in stem cell-based regenerative medicines. Here we developed DNA aptamer-assemblies that act as functional mimics of basic fibroblast growth factor (bFGF), one of the essential factors for stem cell culture. The most potent aptamer assembly named TD0, composed solely of 76-mer single-stranded DNA, could support the self-renewal and pluripotency of induced pluripotent stem cells (iPSCs). Read More

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http://dx.doi.org/10.1039/c8cc08080aDOI Listing
February 2019

Ferri- and ferro-magnetism in CaMnMReO double double perovskites of late transition metals M = Co and Ni.

Chem Commun (Camb) 2019 Feb 12. Epub 2019 Feb 12.

Centre for Science at Extreme Conditions (CSEC) and School of Chemistry, The University of Edinburgh, EH9 3FD, UK.

Two new double double perovskites of ideal compositions CaMnMReO6 (M = Co, Ni) are reported. The M = Co material has refined composition CaMn0.7Co1. Read More

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http://dx.doi.org/10.1039/c8cc09612kDOI Listing
February 2019

An organic-base catalyzed asymmetric 1,4-addition of tritylthiol to in situ generated aza-o-quinone methides at the HO/DCM interface.

Chem Commun (Camb) 2019 Feb 12. Epub 2019 Feb 12.

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China.

Based on an efficient method for in situ generation of N-o-QM species in the presence of a base, enantioselective catalytic conjugated additions of tritylthiol to in situ generated N-o-QMs are reported. Acid-base bifunctional organocatalyst 4c (10 mol%) enables these transformations with high stereoselectivities (up to 94% ee) using H2O/DCM as a solvent under mild conditions. Read More

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http://dx.doi.org/10.1039/c8cc09382bDOI Listing
February 2019

In situ synthesis of photoluminescence-quenching nanopaper for rapid and robust detection of pathogens and proteins.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China.

A green and facile method is presented for in situ synthesis of a novel photoluminescence-quenching nanopaper with a highly-efficient quenching ability, rapid reaction time and long-term storage. The as-prepared nanopaper is further used to construct an aptasensor platform with high performance, rapidness and robustness. Read More

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http://dx.doi.org/10.1039/c8cc09991jDOI Listing
February 2019

A cyclometalating organic ligand with an Iridium center toward dramatically improved photovoltaic performance in organic solar cells.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

Key Lab for Flexible Electronics and Institute of Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China. and Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an 710072, People's Republic of China.

Organometallic compounds as photoactive materials are relatively new in organic solar cells. Upon cyclometalation, the octahedral heteroleptic Ir complex TBzIr exhibits significantly enhanced optical-absorption and improved film-morphology compared to the planar organic 2-(5''-hexyl-[2,2':5',2''-terthiophen]-5-yl)benzo[d]thiazole (TBz) ligand. Thus, a dramatically improved power conversion efficiency (PCE) from ∼0 to 3. Read More

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http://dx.doi.org/10.1039/c9cc00173eDOI Listing
February 2019

Molecular doping: accessing the first carborane-substituted 1,2,3-triphospholanide via insertion of P into a P-P bond.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, D-04103 Leipzig, Germany.

Insertion of a P- anion into a P-P bond yielding the first carborane-substituted 1,2,3-triphospholanide 1 was achieved by treating a carborane-substitued 1,2-diphosphetane with sodium phosphaethynolate. The triphospholanide 1 can serve as a versatile nucleophilic building block for unprecedent functionalised triphospholanes and carborane-substituted polyphosphanes. Read More

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http://dx.doi.org/10.1039/c9cc00205gDOI Listing
February 2019

Acetylene-based two-step diastereoselective synthesis of bridgehead dihydro-oxadiazines using ketones and hydrazine as the only reactants.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St., Irkutsk 664033, Russian Federation.

Pharmaceutically related bridgehead dihydro-1,3,4-oxadiazines are synthesized in up to 94% yield by the acid-catalyzed diastereoselective reaction of hydrazine hydrate with 6,8-dioxabicyclo[3.2.1]octanes (6,8-DOBCOs), the products of the superbase-promoted self-organization of acetylene with ketones. Read More

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http://dx.doi.org/10.1039/c9cc00315kDOI Listing
February 2019

Synthesis of photo-excited Chlorin e6 conjugated silica nanoparticles for enhanced anti-bacterial efficiency to overcome methicillin-resistant Staphylococcus aureus.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics (SIIA), Chengdu University, Chengdu, 610052, Sichuan, P. R. China. and Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia.

Multidrug resistant bacterial infection remains a significant public concern. In this report, photosensitizer Chlorin e6 doped silica was synthesized. This hybrid structure exhibits enhanced photostability and high antibacterial efficiency towards Staphylococcus aureus (S. Read More

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http://xlink.rsc.org/?DOI=C9CC00166B
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http://dx.doi.org/10.1039/c9cc00166bDOI Listing
February 2019
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Selective reduction of 1,5-diazacyclooctatetraenes: synthesis and structures of aromatic diazacyclooctatetraenyl dianions and a 2,6-bipyrrolinyl dianionic Co(ii) complex.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China.

Selective reduction of 1,5-diazacyclooctatetraenes with potassium or a Co(i) complex was achieved to provide the first structurally well-defined aromatic 1,5-diazacyclooctatetraenyl dianion or a novel dinuclear Co(ii) complex bridged by a bipyrrolinyl dianion, respectively. Read More

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http://dx.doi.org/10.1039/c9cc00075eDOI Listing
February 2019

Distinguishing between bulk and edge hydroxyl vibrational properties of 2 : 1 phyllosilicates via deuteration.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

Geochemistry Department, Sandia National Laboratories, Albuquerque, New Mexico 87125, USA.

Observation of vibrational properties of phyllosilicate edges via a combined molecular modeling and experimental approach was performed. Deuterium exchange was utilized to isolate edge vibrational modes from their internal counterparts. The appearance of a specific peak within the broader D2O band indicates the presence of deuteration on the edge surface, and this peak is confirmed with the simulated spectra. Read More

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http://dx.doi.org/10.1039/c9cc00164fDOI Listing
February 2019

A ratiometric fluorescent probe for detecting hypochlorite in the endoplasmic reticulum.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

Department of Chemistry, Korea University, Seoul 02841, Korea.

A colorimetric and fluorescent probe ER-ClO was presented in this work to detect cellular hypochlorite with high selectivity and sensitivity. With an organelle targeting unit, ER-ClO was successfully applied in the bio-imaging of exogenous and endogenous hypochlorite in the endoplasmic reticulum in a ratiometric manner. Read More

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http://xlink.rsc.org/?DOI=C9CC00066F
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http://dx.doi.org/10.1039/c9cc00066fDOI Listing
February 2019
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Theoretical perspective on the reaction mechanism from arylpentazenes to arylpentazoles: new insights into the enhancement of cyclo-N production.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China.

A thorough theoretical exploration of the formation mechanism of arylpentazole (cyclo-N5), the key precursor of cyclo-N5-, has been performed. Three arylpentazene conformers were found as intermediates, and one is crucial for cyclo-N5 production. By scrutinizing the complete reaction pathways and substituent effects, we propose a potential solution to the enhancement of cyclo-N5 yield. Read More

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http://dx.doi.org/10.1039/c8cc10024aDOI Listing
February 2019

Thermoelectric properties of dispersant-free semiconducting single-walled carbon nanotubes sorted by a flavin extraction method.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan. and The World Premier International Research Center Initiative, International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, Japan and JST-PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan and Center for Molecular Systems (CMS), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.

Semiconducting single-walled carbon nanotubes (s-SWNTs) were extracted from SWNT mixtures using a flavin derivative (FC12). We evaluated the thermoelectric properties of the s-SWNT sheets. Electrical conductivity, power factor and figure of merit values of the sheets were increased by two orders of magnitude after removing FC12 simply by dipping in dichloromethane. Read More

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http://dx.doi.org/10.1039/c8cc10264cDOI Listing
February 2019

Synthesis of coordination polymer thin films with conductance-response to mechanical stimulation.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

State Key Laboratory of Precision Spectroscopy (ECNU), Key Laboratory of Polar Materials and Devices (MOE), School of Physics and Materials Science, East China Normal University, Shanghai 200241, China.

Synthesis of coordination polymer thin films which are tough and highly oriented is of vital importance for exploring electronic functions under mechanical stimulation. We synthesized prismatic thin films of copper hexaferrocyanide coordination frameworks by coordination replication on oxidized copper sheets. The films were composed of vertically standing prisms which were similar to mollusk shells. Read More

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http://dx.doi.org/10.1039/c8cc10195gDOI Listing
February 2019
6.834 Impact Factor

Structural evolution in a melt-quenched zeolitic imidazolate framework glass during heat-treatment.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China and Department of Chemistry and Bioscience, Aalborg University, DK-9220 Aalborg, Denmark.

A pronounced enthalpy release occurs around 1.38Tg in the prototypical metal-organic framework glass formed from ZIF-4 [Zn(C3H3N2)2], but there is no sign for any crystallization (i.e. Read More

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http://xlink.rsc.org/?DOI=C8CC09574D
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http://dx.doi.org/10.1039/c8cc09574dDOI Listing
February 2019
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A novel near-infrared fluorescent light-up probe for tumor imaging and drug-induced liver injury detection.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

State Key Laboratory of Virology, Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (MOE), Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China.

A novel near-infrared fluorescent light-up probe with a tumor-homing pentapeptide, CREKA (Cys-Arg-Glu-Lys-Ala), specifically binds to fibrin-fibronectin complexes was rationally designed and developed for biomedical imaging. Its superior practical applications in tumor imaging and drug-induced liver injury detection are well demonstrated for the first time. Read More

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http://dx.doi.org/10.1039/c8cc10286dDOI Listing
February 2019

Tuning of the exchange interaction and the Curie temperature by mixed crystal formation of the bridging anionic ligands.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 2, 24118, Kiel, Germany.

Mixed crystals with the composition [Co(NCS)x(NCSe)2-x(pyridine)2]n were prepared from solution and by annealing of Co(NCS)x(NCSe)2-x(pyridine)4. With increasing selenocyanate content, an increase of the magnetic exchange constant and of the critical temperature (Curie temperature) is observed, which offers a rational route to control these parameters in detail, without changing the metal cations. Read More

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http://dx.doi.org/10.1039/c8cc09392jDOI Listing
February 2019

Enhanced photocatalytic activity of BiVO coupled with iron-based complexes for water oxidation under visible light irradiation.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China. and State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.

[Fe2(TPA)2(μ-O)Cl2]2+ (TPA = tris(2-pyridylmethyl)amine) was investigated as a pre-catalyst, and greatly enhanced the photocatalytic water oxidation activity of BiVO4. An extremely high oxygen yield of 99.1% and apparent quantum yield of 44. Read More

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http://dx.doi.org/10.1039/c8cc09807gDOI Listing
February 2019

Boronic acid derivatized lanthanide-polyoxometalates with novel B-OH-Ln and B-O-Nb bridges.

Chem Commun (Camb) 2019 Feb 11. Epub 2019 Feb 11.

School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Henan Normal University, Xinxiang, Henan 453007, China. and College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.

Three new boronic acid derivatized lanthanide-polyoxometalates (BA-Ln-POMs) were synthesized, in which boronic acids served as bi- or tri-dentate ligands and exhibited interesting coordination ability towards POMs and LnIII. The pH was found to be crucial in controlling the coordination modes of boronic acid and the formation of B-O-Ln and B-O-Nb bridges. Compared with the boronic acid-free Ln-POM, a longer lifetime was observed for compound 2Eu due to the coordination of boronic acids to the EuIII center. Read More

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http://dx.doi.org/10.1039/c8cc09872gDOI Listing
February 2019