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No safe exposure to chlorpyrifos, EU regulators say

Chemical News - 12 August, 2019 - 01:14
Food safety authority finds insecticide does not meet criteria for renewal

Video: The chemistry driving a fish's sex change

Chemical News - 12 August, 2019 - 01:14
Studying one species of tropical fish may reveal clues to sex development in other animals and humans

Pathogen-fighting polymer

Chemical News - 12 August, 2019 - 01:14
Copolymer loaded with sulfonic acid groups kills bacteria and viruses in minutes

MXene membranes could be an affordable way to harvest energy from saltwater

Chemical News - 12 August, 2019 - 01:14
Ion-conducting films made from 2-D materials could lower the cost of generating electricity from salinity gradients

Chemists find source of shark fluorescence

Chemical News - 12 August, 2019 - 01:14
Brominated metabolites make sharks glow and have antibiotic properties

Graphene aerogel keeps single-atom catalysts stable

Chemical News - 12 August, 2019 - 01:13
Unconventional support material firmly anchors active species, prevents agglomeration

Predicting asthma attacks in kids

Chemical News - 12 August, 2019 - 01:12
Wearable environmental sensors, smart devices, and mobile health technologies aim to rein in childhood form of the lung disease

A Photoswitchable Trivalent Cluster Mannoside to Probe the Effects of Ligand Orientation in Bacterial Adhesion

Articles from Wiley - 12 August, 2019 - 00:00

Photocontrol for antiadhesive therapy: Bacterial adhesion to human cell surfaces was controlled through light-mediated reorientation of a multivalent carbohydrate epitope; this underlined the importance of orientational effects in carbohydrate recognition and likewise the value of photoswitchable glycoconjugates for their study.

[Full Papers]
Dr. Guillaume Despras, Dr. Leonhard Möckl, Dr. Anne Heitmann, Insa Stamer, Prof. Dr. Christoph Bräuchle, Prof. Dr. Thisbe K. Lindhorst
doi.org/10.1002/cbic.201900269

Photocatalytic Transformation of Amines to Imines by Meso-Porous Copper Sulfides

Articles from Wiley - 12 August, 2019 - 00:00

A to I: A visible-light-driven catalytic procedure to transform amines to imines using mesoporous copper sulfide has been demonstrated here. Surface chemistry of this heterogeneously catalyzed process was investigated using various spectroscopic methods, reaction kinetics, and by determining reactive oxygen species. The plausible reaction mechanism was found to be consistent with the reaction energies determined by Density-Functional -Theory calculations.

[Communications]
Biswanath Dutta, Laura A. Achola, Ryan Clarke, Dr. Vinit Sharma, Dr. Junkai He, Peter Kerns, Prof. Steven L. Suib
doi.org/10.1002/cctc.201900673

Nitrogen-Doped NiO Nanosheet Array for Boosted Electrocatalytic N<sub>2</sub> Reduction

Articles from Wiley - 12 August, 2019 - 00:00

It's dope! A nitrogen-doped NiO nanosheet array on carbon cloth (N-NiO/CC) exhibited enhanced NRR performance with a NH3 yield of 22.7 μg h−1 mg−1 and an FE of 7.3 % in 0.1 M LiClO4 at −0.5 V (vs. RHE), far superior to those of undoped counterparts (NiO/CC). DFT calculations revealed that the N-doping could induce enhanced surface conductivity and an upraised d-band center, leading to promoted *NNH stabilization, a reduced reaction energy barrier, and thus improved NRR performance.

[Communications]
Xiao-hu Wang, Jing Wang, Yu-biao Li, Prof. Ke Chu
doi.org/10.1002/cctc.201901075

Construction of 2D MOFs@reduced Graphene Oxide Nanocomposites with Enhanced Visible Light-induced Fenton-like Catalytic Performance by Seeded Growth Strategy

Articles from Wiley - 12 August, 2019 - 00:00

GO RGO, go! A novel construction way of 2D-nanocomposite has been reported by controlling the nucleation and growth of metal-organic frameworks (MOFs) rod-shaped particles on the surface of graphene oxide (GO) nanosheets in a facile two-step wet chemistry process. RGO is capable of acting as a template to direct the formation of 2D nanostructures and behave as an electron reservoir to modulate the separation and migration of photo-generated electrons from the MOFs.

[Full Papers]
Xiaojun Hou, Kangze Hu, Huan Zhang, Zhang Tao, Prof. Mu Yang, Prof. Ge Wang
doi.org/10.1002/cctc.201900760

Electrochemical Oxygen Reduction Reaction Performance Boosted by N, P Doped Carbon Layer over Manganese Dioxide Nanorod

Articles from Wiley - 12 August, 2019 - 00:00

Polymerization: MnO2@PANI-800 obtained by a facile approach via an in situ anile polymerization reaction based on aniline and phytic acid following thermal annealing has an outstanding catalytic performance for ORR. It can be attributed to the conductivity improvement and the synergistic effect of the intrinsic activity of manganese oxide and N, P-doped carbon layer.

[Full Papers]
Chengang Pei, Ruifu Ding, Dr. Xu Yu, Prof. Ligang Feng
doi.org/10.1002/cctc.201900886

In-situ Growth of a Bimetallic Cobalt-Nickel Organic Framework on Iron Foam: Achieving the Electron Modification on a Robust Self-supported Oxygen Evolution Electrode

Articles from Wiley - 12 August, 2019 - 00:00

Double doping: The cobalt and nickel double-doped materials in-situ grown on Fe foam exhibited an excellent electrocatalytic activity and remarkable durability with a current density of 10 mA cm−2 in a 0.1 M KOH solution with the overpotential of 264 mV and the Tafel slope of 54.3 mV dec−1. The improved OER performances were benefited from the synergy effect of electrons derived from the multi-metal and the enhanced adhesion between the MOFs and the conductive substrate.

[Full Papers]
Dr. Pei Luo, Dr. Shixiong Li, Yasi Zhao, Guojie Ye, Dr. Cong Wei, Prof. Yun Hu, Prof. Chaohai Wei
doi.org/10.1002/cctc.201900972

Reusable Pd@PEG Catalyst for Aerobic Dehydrogenative C−H/C−H Arylations of 1,2,3-Triazoles

Articles from Wiley - 12 August, 2019 - 00:00

Aerobic C−H arylations were accomplished in benign polyethylene glycol solvent. The easily reusable catalyst Pd(OAc)2 proved to be highly effective for the intramolecular oxidative C−H arylation of 1,2,3-triazoles, thus, enabling a step-economical synthesis of bio-active derivatives in a sustainable fashion (see scheme).

[Communications]
Francesco Ferlin, Dr. Santhivardhana Reddy Yetra, Dr. Svenja Warratz, Prof. Dr. Luigi Vaccaro, Prof. Dr. Lutz Ackermann
doi.org/10.1002/chem.201902901

Lattice Shrinkage by Incorporation of Recombinant Starmaker-Like Protein within Bioinspired Calcium Carbonate Crystals

Articles from Wiley - 12 August, 2019 - 00:00

Controlled growth: The starmaker-like (Stm-l) protein promotes calcium carbonate nucleation and anisotropic tailoring of crystal morphology. Intracrystalline incorporation of protein results in shrinkage of the crystal lattice volume (see figure). The ring pattern, which is composed of a protein-enriched region flanked by protein-depleted regions, is a result of both the Ostwald-like ripening process and intrinsic properties of Stm-l.

[Full Papers]
Mirosława Różycka, Ismael Coronado, Katarzyna Brach, Joanna Olesiak-Bańska, Marek Samoć, Mirosław Zarębski, Jerzy Dobrucki, Maciej Ptak, Eva Weber, Dr. Iryna Polishchuk, Dr. Boaz Pokroy, Jarosław Stolarski, Prof. Andrzej Ożyhar
doi.org/10.1002/chem.201902157

Rational Synthesis of Iron/Nitrogen-Doped Carbon Catalyst through a Spatial Isolation Strategy for Efficient Oxygen Reduction in Acidic and Alkaline Media

Articles from Wiley - 12 August, 2019 - 00:00

Adding active sites: A highly efficient iron/nitrogen-doped carbon (Fe/N-C) catalyst is synthesized through a spatial isolation strategy, involving the pyrolysis of bioinspired polydopamine (PDA)-based hybrid microsphere precursors loaded with atomically dispersed Fe3+/Zn2+ ions and N-rich melamine (see figure). The Fe-N/C catalyst exhibits superior and similar oxygen reduction reaction activities to that of Pt/C in alkaline and acidic solutions, respectively.

[Full Papers]
Bomin Feng, Xiuju Wu, Ling Li, Wei Gao, Dr. Weihua Hu, Prof. Chang Ming Li
doi.org/10.1002/chem.201902521

Ternary Complexes Stabilized by Chalcogen and Alkaline-Earth Bonds: Crucial Role of Cooperativity and Secondary Noncovalent Interactions

Articles from Wiley - 12 August, 2019 - 00:00

Cooperativity in ternary complexes: The cooperativity between chalcogen bonds and alkaline-earth bonds in ternary complexes reinforces the weakest one more (see figure).

[Full Papers]
Otilia Mó, M. Merced Montero-Campillo, Ibon Alkorta, José Elguero, Manuel Yáñez
doi.org/10.1002/chem.201901641

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