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Molecules Designed to Contain Two Weakly Coupled Spins with a Photoswitchable Spacer

Articles from Wiley - 4 agosto, 2017 - 00:00

Molecules Designed to Contain Two Weakly Coupled Spins with a Photoswitchable Spacer

Spin control: Tetranuclear coordination complexes with predetermined homometallic [MM⋅⋅⋅MM] or heterometallic [MM′⋅⋅⋅MM′] topology (M, M′=Cu, Co, Ni, Zn) and photoswitchable spacers were synthesized as potential models of spin-based two-qubit quantum gates. All the heterometallic complexes exhibit two well-defined, weakly interacting magnetic entities. The resonance between two magnetic levels of these units could be used for implementation of a qubit. The reversible cyclization triggered by photoswitching turns the interaction between the two spins of the molecule on and off.

[Full Paper]
Jorge Salinas Uber, Marta Estrader, Jordi Garcia, Paul Lloyd-Williams, Anna Sadurní, Dominik Dengler, Joris van Slageren, Nicholas F. Chilton, Olivier Roubeau, Simon J. Teat, Jordi Ribas-Ariño, Guillem Aromí
Chem. Eur. J., August 04, 2017, https://doi.org/10.1002/chem.201702171 Read article

Ligand- and Solvent-Tuned Chemoselective Carbonylation of Bromoaryl Triflates

Articles from Wiley - 4 agosto, 2017 - 00:00

Ligand‐ and Solvent‐Tuned Chemoselective Carbonylation of Bromoaryl Triflates

Keep control: Palladium-catalyzed chemoselective carbonylation of bromoaryl triflates is reported. The influencing effects of different solvents (polar vs. non-polar) and ligands (e.g., monodentate vs. bidentate) on the chemoselectivety is discussed based on experimental observations as well as DFT calculations (see scheme; Xantphos=4,5-bis(diphenylphosphino)-9,9-dimethylxanthene, DPPF=1,1′-bis(diphenylphosphino)ferrocene).

[Full Paper]
Chaoren Shen, Zhihong Wei, Haijun Jiao, Xiao-Feng Wu
Chem. Eur. J., August 04, 2017, https://doi.org/10.1002/chem.201702015 Read article

n-Channel Organic Semiconductors Derived from Air-Stable Four-Coordinate Boron Complexes of Substituted Thienylthiazoles

Articles from Wiley - 4 agosto, 2017 - 00:00

n‐Channel Organic Semiconductors Derived from Air‐Stable Four‐Coordinate Boron Complexes of Substituted Thienylthiazoles

Building bridges of boron: Introduction of a boron-bridge into thienylthiazole and attachment of acceptor moieties allowed to obtain ambient-stable A-π-A molecules with low-lying LUMO levels. the materials were applied as active layers in organic thin film transistor devices, enhanced electron mobility, measured for A-π-A systems bearing larger aromatic acceptor moieties, can be attributed to the effective 2D π-stacking in the solid state.

[Full Paper]
Reinhard Hecht, Juliane Kade, David Schmidt, Agnieszka Nowak-Król
Chem. Eur. J., August 04, 2017, https://doi.org/10.1002/chem.201701922 Read article

Target-directed Dynamic Combinatorial Chemistry: A Study on Potentials and Pitfalls as Exemplified on a Bacterial Target

Articles from Wiley - 4 agosto, 2017 - 00:00

 A Study on Potentials and Pitfalls as Exemplified on a Bacterial Target

Right on target: A target-directed dynamic combinatorial chemistry approach based on reversible acylhydrazones allowed the identification of high-affinity ligands for a bacterial adhesin. The ratio of building blocks, sample preparation before HPLC analysis, and data procession has proven to be essential for success. Furthermore, removal of unbound ligands before analysis greatly contributed to the identification of good binders.

[Full Paper]
Priska Frei, Lijuan Pang, Marleen Silbermann, Deniz Eriş, Tobias Mühlethaler, Oliver Schwardt, Beat Ernst
Chem. Eur. J., August 04, 2017, https://doi.org/10.1002/chem.201701601 Read article

Intertwined Nitrogen-Doped Carbon Nanotubes for High-Rate and Long-Life Sodium-Ion Battery Anodes

Articles from Wiley - 4 agosto, 2017 - 00:00

Intertwined Nitrogen‐Doped Carbon Nanotubes for High‐Rate and Long‐Life Sodium‐Ion Battery Anodes

Fast and stable: Dopamine-derived intertwined nitrogen-doped carbon nanotubes (N-CNTs) are synthesized by using a hard-template method and tested as anodes in sodium-ion batteries. Thanks to the in situ nitrogen doping and 1D ultrathin nanotubes assembling into a 3D network with a hierarchical pore structure, the N-CNTs exhibit excellent rate capability and cycling stability even after 1000 cycles.

[Article]
Kang Ding, Biao Gao, Jijiang Fu, Weili An, Hao Song, Xingxing Li, Qiuyun Yuan, Xuming Zhang, Kaifu Huo, Paul K. Chu
ChemElectroChem, August 04, 2017, https://doi.org/10.1002/celc.201700590 Read article

Flower-like NiO with a Hierarchical and Mesoporous Structure for Supercapacitors

Articles from Wiley - 4 agosto, 2017 - 00:00

Flower‐like NiO with a Hierarchical and Mesoporous Structure for Supercapacitors

Evolution of flower-like hierarchy: The growth process of hierarchical NiO is driven by surface free energy at the very beginning, and then re-crystallization according to Oster's curing mechanism. The hierarchical and mesoporous electroactive material is shown to be a promising alternative as an electrode material for supercapacitor applications.

[Article]
Shi Yin, Yongqiang Wu, Qinqin Xiong, Haiying Qin, Hong Zhong Chi
ChemElectroChem, August 04, 2017, https://doi.org/10.1002/celc.201700570 Read article

Inkjet Printing of GaPd<sub>2</sub> into Micro-Channels for the Selective Hydrogenation of Acetylene

Articles from Wiley - 4 agosto, 2017 - 00:00

Inkjet Printing of GaPd2 into Micro‐Channels for the Selective Hydrogenation of Acetylene

Print it! Different inks containing intermetallic GaPd2 nanoparticles were formulated and applied by inkjet printing into micro-structured reaction channels resulting in thin and homogeneous layers. GaPd2/&#x3B1;-Al2O3 showed excellent activity and selectivity for the semi-hydrogenation of acetylene.

[Full Paper]
Martin Siebert, René R. Zimmermann, Marc Armbrüster, Roland Dittmeyer
ChemCatChem, August 04, 2017, https://doi.org/10.1002/cctc.201700288 Read article

Corrigendum: Biosynthetic Gene Cluster for Surugamide A Encompasses an Unrelated Decapeptide, Surugamide F

Articles from Wiley - 4 agosto, 2017 - 00:00

[Corrigendum]
Akihiro Ninomiya, Yohei Katsuyama, Takefumi Kuranaga, Masayuki Miyazaki, Yuichi Nogi, Shigeru Okada, Toshiyuki Wakimoto, Yasuo Ohnishi, Shigeki Matsunaga, Kentaro Takada
ChemBioChem, August 04, 2017, https://doi.org/10.1002/cbic.201700401 Read article

Permeable polymer is choosy about what gases it passes

Chemical News - 3 agosto, 2017 - 19:03
Advance may broaden application of low-cost polymer membranes for gas separation

Keeping a close eye on lithium ions

Chemical News - 3 agosto, 2017 - 18:49
A fluorescent imaging agent that binds directly to lithium ions could help researchers better understand why batteries wear out

Cane toad microbiome transforms its toxins

Chemical News - 3 agosto, 2017 - 13:21
Microbe management could be a new strategy for controlling toad population growth

People with allergies have special set of immune cells, researchers find

Chemical News - 3 agosto, 2017 - 00:15
Cells could serve as indicators of the efficacy of allergy therapies and provide new drug targets

Evaluating Dihydroazulene/Vinylheptafulvene Photoswitches for Solar Energy Storage Applications

Articles from Wiley - 3 agosto, 2017 - 00:00

Evaluating Dihydroazulene/Vinylheptafulvene Photoswitches for Solar Energy Storage Applications

“We demonstrate how this couple shows promise as a MOST candidate in flow systems…” This and more about the story behind the research that inspired the Cover image is presented in the Cover Profile. Read the full text of the corresponding research at 10.1002/cssc.201700679. View the Front Cover here: 10.1002/cssc.201701336.

[Cover Profile]
Zhihang Wang, Jonas Udmark, Karl Börjesson, Rita Rodrigues, Anna Roffey, Maria Abrahamsson, Mogens Brøndsted Nielsen, Kasper Moth-Poulsen
ChemSusChem, August 03, 2017, https://doi.org/10.1002/cssc.201701337 Read article

Plasmonic Gold Nanostars Incorporated into High-Efficiency Perovskite Solar Cells

Articles from Wiley - 3 agosto, 2017 - 00:00

Plasmonic Gold Nanostars Incorporated into High‐Efficiency Perovskite Solar Cells

Golden star: Plasmonic gold nanostars are incorporated into mesoporous TiO2 photoelectrodes to fabricate high efficiency perovskite solar cells. A power conversion efficiency of 17.72 % is achieved using TiO2-AuNSs photoelectrode-based device.

[Communication]
Munkhbayar Batmunkh, Thomas J. Macdonald, William J. Peveler, Abdulaziz S. R. Bati, Claire J. Carmalt, Ivan P. Parkin, Joseph G. Shapter
ChemSusChem, August 03, 2017, https://doi.org/10.1002/cssc.201701056 Read article

Low-Cost Perovskite Solar Cells Employing Dimethoxydiphenylamine-Substituted Bistricyclic Aromatic Enes as Hole Transport Materials

Articles from Wiley - 3 agosto, 2017 - 00:00

Low‐Cost Perovskite Solar Cells Employing Dimethoxydiphenylamine‐Substituted Bistricyclic Aromatic Enes as Hole Transport Materials

Bridge to success: We report the synthesis of three new hole transport materials (HTMs) using a cost-effective procedure and the impact of different atoms in heteromerous bistricyclic aromatic ene scaffolds. S-bridged KR374 shows a a significantly improved hole-drift mobility leading to enhanced photovoltaic performance in mixed-ion perovskite solar cells and reduced hysteresis owing to the improved interface between the perovskite and HTM caused by stronger Pb–S interaction.

[Full Paper]
Kasparas Rakstys, Sanghyun Paek, Giulia Grancini, Peng Gao, Vygintas Jankauskas, Abdullah M. Asiri, Mohammad Khaja Nazeeruddin
ChemSusChem, August 03, 2017, https://doi.org/10.1002/cssc.201700974 Read article

Sulfur-Doped Graphene Oxide Quantum Dots as Photocatalysts for Hydrogen Generation in the Aqueous Phase

Articles from Wiley - 3 agosto, 2017 - 00:00

Sulfur‐Doped Graphene Oxide Quantum Dots as Photocatalysts for Hydrogen Generation in the Aqueous Phase

Let the sun shine: A metal-free and inexpensive catalyst, sulfur-doped graphene oxide quantum dots, is developed for efficient photocatalytic H2 production in pure water. Under direct sunlight irradiation, high initial H2 production rates in pure water and in 80 % ethanol aqueous solution indicate great potential in the development of sustainable and environmentally friendly photocatalysts for efficient H2 generation from water splitting.

[Full Paper]
Jacek Gliniak, Jia-Hoa Lin, Yi-Ting Chen, Chuen-Ru Li, Efat Jokar, Chin-Hao Chang, Chun-Sheng Peng, Jui-Nien Lin, Wan-Hsiang Lien, Hui-Min Tsai, Tung-Kung Wu
ChemSusChem, August 03, 2017, https://doi.org/10.1002/cssc.201700910 Read article

Enhanced Interfacial Charge Transfer on a Tungsten Trioxide Photoanode with Immobilized Molecular Iridium Catalyst

Articles from Wiley - 3 agosto, 2017 - 00:00

Enhanced Interfacial Charge Transfer on a Tungsten Trioxide Photoanode with Immobilized Molecular Iridium Catalyst

A modified photoanode: An iridium complex is immobilized on a WO3 electrode to construct a composite photoanode for photoelectrochemical (PEC) water splitting. The photoanode shows a significant improvement both in photocurrent and faradaic efficiency. Kinetic studies reveal that the molecular iridium catalyst exhibits a different interfacial charge-transfer mechanism on the WO3 photoanode for PEC water oxidation compared to iridium oxide.

[Full Paper]
Haili Tong, Yi Jiang, Qian Zhang, Jialing Li, Wenchao Jiang, Donghui Zhang, Na Li, Lixin Xia
ChemSusChem, August 03, 2017, https://doi.org/10.1002/cssc.201700721 Read article

Spectroscopic Study of the Interaction between Horse Heart Myoglobin and Zirconium(IV)-Substituted Polyoxometalates as Artificial Proteases

Articles from Wiley - 3 agosto, 2017 - 00:00

Spectroscopic Study of the Interaction between Horse Heart Myoglobin and Zirconium(IV)‐Substituted Polyoxometalates as Artificial Proteases

Probing the heart of the complex: The interaction between horse heart myoglobin and zirconium(IV)-substituted polyoxometalates (POMs) is revealed through spectroscopic techniques including circular dichroism, UV/Vis, tryptophan fluorescence, 1H NMR, and 31P NMR spectroscopy (see figure).

[Article]
Hong Giang T. Ly, Tatjana N. Parac-Vogt
ChemPhysChem, August 03, 2017, https://doi.org/10.1002/cphc.201700680 Read article

Experimental Determination of the Molar Absorption Coefficient of <i>n</i>-Hexane Adsorbed on High-Silica Zeolites

Articles from Wiley - 3 agosto, 2017 - 00:00

Experimental Determination of the Molar Absorption Coefficient of n‐Hexane Adsorbed on High‐Silica Zeolites

Gas capture: The determination of molar absorption coefficients of the CH3 bending mode at inline image =1380 cm−1 (&#x3F5;1380) of n-hexane adsorbed on high-silica zeolite Y (HSZ-Y) and ZSM-5 is derived herein by means of a combined IR spectroscopy and microgravimetric analysis procedure (see figure).

[Article]
Giorgio Gatti, Diana F. Olivas Olivera, Vittoria Sacchetto, Maurizio Cossi, Ilaria Braschi, Leonardo Marchese, Chiara Bisio
ChemPhysChem, August 03, 2017, https://doi.org/10.1002/cphc.201700481 Read article

Electronic Transport of MoS<sub>2</sub> Monolayered Flakes Investigated by Scanning Electrochemical Microscopy

Articles from Wiley - 3 agosto, 2017 - 00:00

Electronic Transport of MoS2 Monolayered Flakes Investigated by Scanning Electrochemical Microscopy

Connected or not? Scanning electrochemical microscopy is introduced as a tool to investigate molybdenum disulfide in a straightforward fashion, providing localized information regarding the electronic transport within CVD-grown crystalline MoS2 single layers having micrometric sizes. The investigations show that there is a very large diversity of electrical connections between flakes.

[Article]
Olivier Henrotte, Thomas Bottein, Hugo Casademont, Kevin Jaouen, Tiphaine Bourgeteau, Stephane Campidelli, Vincent Derycke, Bruno Jousselme, Renaud Cornut
ChemPhysChem, August 03, 2017, https://doi.org/10.1002/cphc.201700343 Read article

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