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Chemical Communications: Chem Comm

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https://read.qxmd.com/read/30758391/in-situ-synthesis-of-a-high-performance-bismuth-oxide-based-composite-cathode-for-low-temperature-solid-oxide-fuel-cells
#1
Wei Fang, Tianrang Yang, Kevin Huang
Here, we report the design and fabrication of a cost-effective and high-performance composite (Bi0.75Y0.25)0.93Ce0.07O1.5±δ-La0.8Sr0.2MnO3 cathode by an in situ synthesis strategy with single-step phase formation and microstructure assembly, which shows lower cathode polarization resistance and better oxygen reduction reaction activity than the conventional LSM-based cathodes for low temperature solid oxide fuel cells.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30758384/nickel-catalyzed-alkyl-alkyl-cross-coupling-reactions-of-non-activated-secondary-alkyl-bromides-with-aldehydes-as-alkyl-carbanion-equivalents
#2
Chenghao Zhu, Junliang Zhang
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. In addition, non-activated primary and tertiary alkyl bromides also undergo the cross-coupling reaction to form new C(sp3)-C(sp3) bonds in moderate yields.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30758380/cryo-assisted-exfoliation-of-atomically-thin-2d-sb-2-se-3-nanosheets-for-photo-induced-theranostics
#3
Linxin Fan, Doudou Huang, Yichuan Wang, Zhaohua Miao, Yan Ma, Qingliang Zhao, Zhengbao Zha
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.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30758374/enhancing-selectivity-of-cation-exchange-with-anion-receptors
#4
Neil J Williams, Santanu Roy, Campbell O Reynolds, Radu Custelcean, Vyacheslav S Bryantsev, Bruce A Moyer
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.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30758355/a-visible-light-induced-oxidative-cyclization-of-n-propargylanilines-with-sulfinic-acids-to-3-sulfonated-quinoline-derivatives-without-external-photocatalysts
#5
Yicheng Zhang, Wei Chen, Xueshun Jia, Lei Wang, Pinhua Li
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.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30758354/aldehyde-effect-and-ligand-discovery-in-ru-catalyzed-dehydrogenative-cross-coupling-of-alcohols-to-esters
#6
Xiaolin Jiang, Jiahui Zhang, Dongmei Zhao, Yuehui Li
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. Hydrogen bonding interactions between the phosphine oxide moieties and alcohol substrates likely assisted the observed high chemoselectivity...
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30758352/hydrothermal-synthesis-of-novel-rhombic-dodecahedral-sns-nanocrystals-for-highly-efficient-photothermal-therapy
#7
Fei Chen, Dongliang Yang, Haifeng Shen, Meng Deng, Ying Zhang, Guolun Zhong, Yanling Hu, Lixing Weng, Zhimin Luo, Lianhui Wang
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. Moreover, they show good performance for photothermal therapy of HeLa tumors.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30758031/facile-fabrication-of-highly-efficient-etl-free-perovskite-solar-cells-with-20-efficiency-by-defect-passivation-and-interface-engineering
#8
Chun Huang, Peng Lin, Nianqing Fu, Chang Liu, Baomin Xu, Kaiwen Sun, Danyang Wang, Xierong Zeng, Shanming Ke
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. A high efficiency of 20.1% along with a reduced J-V hysteresis in our champion perovskite solar cells without electron transport layers is achieved...
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30758029/protacs-suppression-of-cdk4-6-crucial-kinases-for-cell-cycle-regulation-in-cancer
#9
Bosheng Zhao, Kevin Burgess
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.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30758023/photocatalytic-reductive-radical-radical-coupling-of-n-n-cyclicazomethine-imines-with-difluorobromo-derivatives
#10
Peng-Ju Xia, Zhi-Peng Ye, Dan Song, Ji-Wei Ren, Han-Wen Wu, Jun-An Xiao, Hao-Yue Xiang, Xiao-Qing Chen, Hua Yang
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.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30758019/bridging-exosome-and-liposome-through-zirconium-phosphate-coordination-chemistry-a-new-method-for-exosome-detection
#11
Lei Wang, Yucai Yang, Yunfei Liu, Limin Ning, Yang Xiang, Genxi Li
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.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30758016/hybrid-nanostructures-of-pit-rich-tio-2-nanocrystals-with-ru-loading-and-n-doping-for-enhanced-solar-water-splitting
#12
Haiqing Wang, Huiling Liu, Yanchen Ji, Ruiqi Yang, Zengfu Zhang, Xun Wang, Hong Liu
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.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30758001/cubic-snge-nanoalloys-beyond-thermodynamic-composition-limit
#13
Karthik Ramasamy, Paul G Kotula, Norman Modine, Michael T Brumbach, Jeffrey M Pietryga, Sergei A Ivanov
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.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30756105/liquid-phase-exfoliation-of-carbonate-intercalated-layered-double-hydroxides
#14
Jose A Carrasco, Andrew Harvey, Damien Hanlon, Vicent Lloret, Dave McAteer, Roger Sanchis-Gual, Andreas Hirsch, Frank Hauke, Gonzalo Abellán, Jonathan N Coleman, Eugenio Coronado
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.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30756102/versatile-fluorophores-for-bioimaging-applications-%C3%AF-expanded-naphthalimide-derivatives-with-skeletal-and-appendage-diversity
#15
Martin Havlík, Veronika Talianová, Robert Kaplánek, Tomáš Bříza, Bohumil Dolenský, Jarmila Králová, Pavel Martásek, Vladimír Král
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. The LysoSers show excellent brightness and low toxicity.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30756101/two-dimensional-sers-encoding-method-for-on-bead-peptide-sequencing-in-high-throughput-bioanalysis
#16
Sinyoung Jeong, Homan Kang, Myeong Geun Cha, Sung Gun Lee, Jaehi Kim, Hyejin Chang, Yoon-Sik Lee, Dae Hong Jeong
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.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30756099/tuning-octahedral-tilts-and-the-polar-nature-of-a-site-deficient-perovskites
#17
Dashnor Beqiri, Vanessa Cascos, Jennie Roberts-Watts, Ewan R Clark, Eric Bousquet, Nicholas C Bristowe, Emma E McCabe
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.
February 13, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30747934/metal-organic-framework-derived-nb-2-o-5-c-nanoparticles-grown-on-reduced-graphene-oxide-for-high-energy-lithium-ion-capacitors
#18
Xinyan Jiao, Qingli Hao, Xifeng Xia, Zongdeng Wu, Wu Lei
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.
February 12, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30747206/a-lysosome-targeting-dual-functional-fluorescent-probe-for-imaging-intracellular-viscosity-and-beta-amyloid
#19
Hui-Ya Tan, Yu-Tai Qiu, Han Sun, Jin-Wu Yan, Lei Zhang
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.
February 12, 2019: Chemical Communications: Chem Comm
https://read.qxmd.com/read/30747181/mitochondria-targeted-and-nadh-triggered-photodynamic-activity-of-chloromethyl-modified-ru-ii-complexes-under-hypoxic-conditions
#20
Na Tian, Weize Sun, Xusheng Guo, Jian Lu, Chao Li, Yuanjun Hou, Xuesong Wang, Qianxiong Zhou
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).
February 12, 2019: Chemical Communications: Chem Comm
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