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Articles from Wiley

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The latest papers in Chemistry Europe
Updated: 4 weeks 3 days ago

Flexible Solid-State Asymmetric Supercapacitors with Enhanced Performance Enabled by Free-Standing MXene−Biopolymer Nanocomposites and Hierarchical Graphene−RuO<sub><i>x</i></sub> Paper Electrodes

30 April, 2020 - 00:00

Flexible supercap: Free-standing nanocomposite paper electrodes with aligned layered architecture are achieved using MXene and biopolymer (L-DEA), realizing high electrochemical performance, excellent cycle life, fast redox reactions, and improved ion transport due to short diffusion pathways. An asymmetric solid-state supercapacitor is developed based on the Mo1.33C@L-DEA and EG@RuOx electrode with elevated potential window and ultrahigh energy density.

[Articles]
Dr. Leiqiang Qin, Quanzheng Tao, Lianlian Liu, Dr. Jianxia Jiang, Dr. Xianjie Liu, Prof. Mats Fahlman, Prof. Lintao Hou, Prof. Johanna Rosen, Prof. Fengling Zhang
doi.org/10.1002/batt.202000044

Effects of Mn-doping on the Structural and Electrochemical Properties of Na<sub>3</sub>Ni<sub>2</sub>SbO<sub>6</sub> for Sodium-Ion Battery

30 April, 2020 - 00:00

“To us, it was quite natural to ask the question whether Ni could be partially replaced by other transition or non-transition metals….“ Learn more about the story behind the research featured on the front cover in this issue's Cover Profile. Read the corresponding Article on 10.1002/batt.201900166.

[Cover Profile]
Dr. Yongho Kee, Dr. Brecht Put, Dr. Nikolay Dimov, Prof. Dr. Aleksandar Staykov, Prof. Dr. Shigeto Okada
doi.org/10.1002/batt.202000073

The Influence of Competing tRNA Abundance on Translation: Quantifying the Efficiency of Sense Codon Reassignment at Rarely Used Codons

30 April, 2020 - 00:00

Making sense: We quantitatively evaluate the effect of the abundance of competing endogenous tRNAs on the ability of orthogonal tRNA variants to reassign E. coli sense codons. For rarely used codons, a strong correlation exists between tRNA abundance and reassignment efficiency. Our measurements suggest that the Ile AUA codon is a particularly good target for genetic code expansion.

[Full Papers]
David G. Schwark, Dr. Margaret A. Schmitt, Wil Biddle, Prof. John D. Fisk
doi.org/10.1002/cbic.202000052

Riboflavin Is Directly Involved in N-Dealkylation Catalyzed by Bacterial Cytochrome P450 Monooxygenases

30 April, 2020 - 00:00

Direct transfer: Riboflavin directly transfers electrons to bacterial cytochrome P450 monooxygenases in an oxidative N-dealkylation. A new mechanism for the electron-transfer process is proposed that could be generally applicable to numerous P450-like monooxygenases that lack the reductase domain.

[Full Papers]
Dr. Chengchang Zhang, Dr. Meiling Lu, Dr. Lin Lin, Prof. Dr. Zhangjian Huang, Prof. Dr. Rongguang Zhang, Dr. Xuri Wu, Prof. Dr. Yijun Chen
doi.org/10.1002/cbic.202000071

Liquid-Phase Exfoliation and Functionalization of MoS<sub>2</sub> Nanosheets for Effective Antibacterial Application

30 April, 2020 - 00:00

Plusses and minuses: A lysozyme (Lys)-assisted liquid-phase exfoliation technique was designed to synthesize MoS2 nanosheets (MoS2-Lys NSs). The MoS2-Lys NSs as effective nanozyme antibacterial agent with high peroxidase-like catalytic activity showed efficient antibacterial activity against both Gram-negative Ampr E. coli and Gram-positive B. subtilis.

[Full Papers]
Dongqing Ma, Changjian Xie, Tao Wang, Linqiang Mei, Xiao Zhang, Zhao Guo, Prof. Wenyan Yin
doi.org/10.1002/cbic.202000195

Breaking a Couple: Disulfide Reducing Agents

30 April, 2020 - 00:00

Breaking bridges: The efficient reduction of disulfide bridges between two cysteine residues or a cysteine and a protecting group is a requirement for many applications of cysteine-containing molecules in the fields of chemistry and biochemistry.

[Minireviews]
Sinenhlanhla N. Mthembu, Dr. Anamika Sharma, Prof. Fernando Albericio, Prof. Beatriz G. de la Torre
doi.org/10.1002/cbic.202000092

Copper-Catalyzed Aerobic Oxidative Amination of Indole Derivatives <i>via</i> Single-Electron Transfer

30 April, 2020 - 00:00

Copper catalysis: We have developed a green and efficient oxidative C−H/N−H coupling between indole and phenothiazine derivatives. This approach can be performed by the Cu(I)/air system under mild conditions. A series of indole derivatives and phenothiazines are compatible with the optimized conditions to deliver the amination products in good to excellent yields. Mechanistically, both indole and phenothiazine derivatives are used to be oxidized by copper (II) via single-electron-transfer followed by cross-coupling to drive the transformation.

[Communications]
Prof. Peizheng Zhao, Ke Wang, Dr. Yuanyuan Yue, Junli Chao, Yaqing Ye, Prof. Qinghu Tang, Prof. Jianming Liu
doi.org/10.1002/cctc.202000284

Rules for Selecting Metal Cocatalyst Based on Charge Transfer and Separation Efficiency between ZnO Nanoparticles and Noble Metal Cocatalyst Ag/ Au/ Pt

30 April, 2020 - 00:00

Photocatalysis: Interfacial charge transfer and separation efficiencies for ZnO nanoparticles and metal cocatalysts Ag, Au and Pt respectively were investigated by ultrafast mid-IR transient absorption spectroscopy. Ohmic contact of Ag with ZnO favoring electron transfer and charge separation, while Schottky junction of Pt or Au with ZnO preventing electron transfer. A dual metal cocatalyst strategy is proposed for selection of the metal catalysis with the inner metal for efficient charge transfer and electron shuttle, and the outer-layer metal for the optimal chemical reactivity.

[Communications]
Qianxia Liu, Dr. Zhuan Wang, Dr. Hailong Chen, Dr. Hao-Yi Wang, Dr. Hui Song, Prof. Jinhua Ye, Prof. Yuxiang Weng
doi.org/10.1002/cctc.202000280

Pathway Dependence in Redox-Driven Metal-Organic Gels

30 April, 2020 - 00:00

Kinetic control: Pathway dependence is common in self-assembly. Here, the importance of pathway dependence for redox-driven gels is discussed by constructing a FeII/FeIII redox-based metal-organic gel system.

[Communications]
Dr. Santanu Panja, Prof. Dave J. Adams
doi.org/10.1002/chem.202001051

Dirhodium(II)-Catalyzed C(sp<sup>2</sup>)−H Azidation of Benzaldehydes

30 April, 2020 - 00:00

In this study, the direct azidation of benzaldehydes catalyzed by the dirhodium(II) catalysts was successfully achieved by the slow generation of the putative one-electron oxidative intermediate Rh2(II,III)N3. Such a highly efficient direct azidation provides a more concise route for the synthesis of some important bioactive compounds.” Read more about the story behind the cover in the Cover Profile and about the research itself on page ▪▪ ff. (DOI: 10.1002/chem.201905855).

[Cover Profile]
Dr. Yi Wang, Zaixiang Fang, Prof. Xiaochuan Chen, Prof. Yuanhua Wang
doi.org/10.1002/chem.202001173

Heterogeneous Olefin Hydrogenation Enabled by a Highly-Reduced Nickel(−II) Catalyst Precursor

30 April, 2020 - 00:00

Our manuscript investigates the reduction of sterically demanding alkenes to alkanes using dihydrogen. A highly reduced nickelate complex served as a pre-catalyst for the generation of nickel nanoparticles, which catalyze this challenging reaction.” Read more about the story behind the cover in the Cover Profile and about the research itself on page ▪▪ ff. (DOI: 10.1002/chem.201905537).

[Cover Profile]
Thomas M. Maier, Sebastian Sandl, Peter Melzl, Prof. Dr. Josef Zweck, Prof. Dr. Axel Jacobi von Wangelin, Prof. Dr. Robert Wolf
doi.org/10.1002/chem.202001019

Noncovalent Functionalization of Few-Layered Antimonene with Fullerene Clusters and Photoinduced Charge Separation in the Composite

30 April, 2020 - 00:00

Few-layered antimonene (FLSb) nanosheets were noncovalently functionalized with C60 clusters by quick addition of a poor solvent into a mixed dispersion of FLSb and C60 in a good solvent. Flash-photolysis time-resolved microwave conductivity (FP-TRMC) measurements revealed the occurrence of photoinduced charge separation in the nanocomposite.

[Full Papers]
Prof. Dr. Tomokazu Umeyama, Tomoya Ohara, Dr. Yusuke Tsutsui, Shota Nakano, Prof. Dr. Shu Seki, Prof. Dr. Hiroshi Imahori
doi.org/10.1002/chem.202001740

Lead-Doped Titanium-Oxo Clusters as Molecular Models of Perovskite-Type PbTiO<sub>3</sub> and Electron-Transport Material in Solar Cells

30 April, 2020 - 00:00

Outstanding resemblance! The first molecular model of perovskite PbTiO3 has been successfully prepared by bottom-up assembly of lead-doped titanium-oxo clusters in the presence of p-tert-butylthiacalix[4]arene as stabilizing ligands. Structural characterization confirmed that the clusters have almost the same structure as that in PbTiO3 (see figure). The nanoclusters showed high solution stability and can be applied as electron-transport materials in perovskite solar cells to give satisfactory efficiencies and high device stability.

[Full Papers]
Shuyu Zhou, Congping Li, Hao Fu, Dr. Jing Cao, Prof. Dr. Jian Zhang, Prof. Dr. Lei Zhang
doi.org/10.1002/chem.202000911

Magnetism and Afterglow United: Synthesis of Novel Double Core-Shell Eu<sup>2+</sup>-Doped Bifunctional Nanoparticles

30 April, 2020 - 00:00

Afterglow for bioimaging: The auto-fluorescence problem of living cells during bioimaging can potentially be solved by using novel magnetic-afterglow nanoparticles.

[Full Papers]
Huayna Terraschke, Matthias Franzreb, Claudia Wickleder
doi.org/10.1002/chem.201904551

Carbon Nitride as a Ligand: Selective Hydrogenation of Terminal Alkenes Using [(η<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)IrCl(g-C<sub>3</sub>N<sub>4</sub>-κ<sup>2</sup><i>N,N’</i>)]Cl

30 April, 2020 - 00:00

Bulky solid ligand: Selective catalytic hydrogenation of terminal alkenes is observed when [Cp*IrCl]+ is supported on g-C3N4. Direct coordination of [Cp*IrCl]+ to g-C3N4 occurs via κ2N,N’ binding and is limited to exposed edge sites. The restricted steric environment at the Ir atom results in slow but highly selective catalysis.

[Full Papers]
Dr. Ben Coulson, Dr. Leonardo Lari, Dr. Mark Isaacs, Dr. Daniel J. Raines, Dr. Richard E. Douthwaite, Prof. Anne-K. Duhme-Klair
doi.org/10.1002/chem.201905749

Quantification of the Interaction of SmI<sub>2</sub> with Substrates and Ligands

30 April, 2020 - 00:00

A measurement tool: The method described herein allows for both: 1) a quantitative determination of the interaction of SmI2 with substrates prior to the electron transfer step and 2) an accurate determination of the first equilibrium constants for the coordination of various ligands with this reagent.

[Full Papers]
Dr. Suranjan De, Dr. Hugo E. Gottlieb, Prof. Shmaryahu Hoz
doi.org/10.1002/chem.201905233

A Cornucopia of Iridium Nitrogen Compounds Produced from Laser-Ablated Iridium Atoms and Dinitrogen

30 April, 2020 - 00:00

Iridium and nitrogen: This work presents the last missing homoleptic dinitrogen and nitrido complexes of the platinum-group metals and helps understanding the interaction of nitrogen with metals to facilitate nitrogen fixation. Dinitrogen activation, oxidation states and bond orders are discussed and give insight to the reactivity and electronic structure of these intriguing compounds.

[Full Papers]
Tony Stüker, Dr. Helmut Beckers, Prof. Sebastian Riedel
doi.org/10.1002/chem.201905514

Stereochemistry-Controlled Supramolecular Architectures of New Tetrahydroxy-Functionalised Amphiphilic Carbocyanine Dyes

30 April, 2020 - 00:00

Sheets and tubes: The syntheses of amphiphilic 5,5′,6,6′-tetrachlorobenzimidacarbocyanine dye derivatives with aminopropanediol head groups, which only differ in stereochemistry (chiral enantiomers, meso form and conformer), are reported. The experiments demonstrate that the aggregation behaviour of compounds can be controlled solely by head group stereochemistry.

[Full Papers]
Dr. Boris Schade, Dr. Abhishek Kumar Singh, Dr. Virginia Wycisk, Dr. Jose Luis Cuellar-Camacho, Dr. Hans von Berlepsch, Prof. Rainer Haag, Dr. Christoph Böttcher
doi.org/10.1002/chem.201905745

Ring Enlargement of Three-Membered Heterocycles by Treatment with In Situ Formed Tricyanomethane

30 April, 2020 - 00:00

Hidden acid: Cyanoform, which is generated in situ from azidomethylidene-malonodinitrile or other precursors, induces ring-expansion reactions of epoxides, thiirane, aziridines, or 2H-azirines. The transformations are always initiated through protonation of the heteroatom X by cyanoform, but lead to the five-membered heterocycles through different mechanisms (see scheme).

[Full Papers]
Prof. Dr. Klaus Banert, Dr. Madhu Chityala, Dr. Marcus Korb
doi.org/10.1002/chem.202000089

Green-Light Activation of Push-Pull Ruthenium(II) Complexes

30 April, 2020 - 00:00

Go green! Push-pull substituted ruthenium(II) complexes strongly absorb green light and emit in the red to near-infrared spectral region. Replacing X=NMe by X=CO in the ligand backbone boosts the luminescence quantum yield and 3MLCT lifetime (Φ=1.3 %; τ=477 ns). Amines reductively quench the long-lived 3MLCT state enabling photoredox chemistry (light-sensitized thiol-ene click reaction) with green light (see figure).

[Full Papers]
Johannnes Moll, Cui Wang, Ayla Päpcke, Dr. Christoph Förster, Dr. Ute Resch-Genger, Prof. Dr. Stefan Lochbrunner, Prof. Dr. Katja Heinze
doi.org/10.1002/chem.202000871

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