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Articles from Wiley

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The latest chemistry from ChemPubSoc Europe and Wiley-VCH
Aggiornato: 18 settimane 5 giorni fa

Self-Assembled Dendritic Pt Nanostructure with High-Index Facets as Highly Active and Durable Electrocatalyst for Oxygen Reduction

4 agosto, 2017 - 00:00

Self‐Assembled Dendritic Pt Nanostructure with High‐Index Facets as Highly Active and Durable Electrocatalyst for Oxygen Reduction

The Inside Cover picture shows a graphical representation of the oxygen reduction reaction on self-assembled dendritic Pt nanoparticles in proton-exchange membrane fuel cells. The Pt nanodendrite catalyst exhibits high catalytic activity and durability owing to the formation of well-organized dendritic structures with plenty of reactive interfaces and the coexistence of low- and high-index facets on the particles. More details can be found in the Full Paper by Jang et al. (DOI: 10.1002/cssc.201700852).

[Cover Picture]
Youngjin Jang, Kwang-Hyun Choi, Dong Young Chung, Ji Eun Lee, Namgee Jung, Yung-Eun Sung
ChemSusChem, August 04, 2017, https://doi.org/10.1002/cssc.201701338 Read article

Evaluating Dihydroazulene/Vinylheptafulvene Photoswitches for Solar Energy Storage Applications

4 agosto, 2017 - 00:00

Evaluating Dihydroazulene/Vinylheptafulvene Photoswitches for Solar Energy Storage Applications

The Cover picture shows an implementation of molecular solar thermal energy storage (MOST) technology on a large scale. It illustrates how the yellow-colored dihydroazulene (DHA) is converted into red-colored vinylheptafulvene (VHF) upon irradiation. The robust nature of this system was demonstrated through multiple energy storage-and-release cycles. As a potential candidate for the MOST concept, the photoswitch was evaluated both under simulated sunlight conditions as well as under natural outdoor conditions, demonstrating a possible avenue for future lab-to-site transfer. More details can be found in the Full Paper by Wang et al. (DOI: 10.1002/cssc.201700679).

[Cover Picture]
Zhihang Wang, Jonas Udmark, Karl Börjesson, Rita Rodrigues, Anna Roffey, Maria Abrahamsson, Mogens Brøndsted Nielsen, Kasper Moth-Poulsen
ChemSusChem, August 04, 2017, https://doi.org/10.1002/cssc.201701336 Read article

Vinylation of Aryl Ether (Lignin β-O-4 Linkage) and Epoxides with Calcium Carbide through C−O Bond Cleavage

4 agosto, 2017 - 00:00

Vinylation of Aryl Ether (Lignin β‐O‐4 Linkage) and Epoxides with Calcium Carbide through C−O Bond Cleavage

Valued vinyl: A mild and transition-metal-free protocol for the vinylation of epoxides and aryl-ether linkage (β-O-4 lignin model compound) with calcium carbide through C−O bond cleavage is proposed, forming valuable vinyl ether products.

[Communication]
Siew Ping Teong, Jenny Lim, Yugen Zhang
ChemSusChem, August 04, 2017, https://doi.org/10.1002/cssc.201701153 Read article

One-Step Cationic Grafting of 4-Hydroxy-TEMPO and its Application in a Hybrid Redox Flow Battery with a Crosslinked PBI Membrane

4 agosto, 2017 - 00:00

One‐Step Cationic Grafting of 4‐Hydroxy‐TEMPO and its Application in a Hybrid Redox Flow Battery with a Crosslinked PBI Membrane

Grafting and crosslinking: Through cationic grafting of a redox active nitroxyl radical and crosslinking an anionexchange PBI (polybenzimidazole) membrane, we improve the cycling properties of a hybrid flow battery utilizing low-cost components (organic active compound, zinc, anion-exchange membrane).

[Communication]
Zhenjun Chang, Dirk Henkensmeier, Ruiyong Chen
ChemSusChem, August 04, 2017, https://doi.org/10.1002/cssc.201701060 Read article

Molecular Self-Assembly Fabrication and Carrier Dynamics of Stable and Efficient CH<sub>3</sub>NH<sub>3</sub>Pb<sub>(1−<i>x</i>)</sub>Sn<sub><i>x</i></sub>I<sub>3</sub> Perovskite Solar Cells

4 agosto, 2017 - 00:00

Molecular Self‐Assembly Fabrication and Carrier Dynamics of Stable and Efficient CH3NH3Pb(1−x)SnxI3 Perovskite Solar Cells

Toward lead-free: We employ a molecular self-assembly approach to obtain a series CH3NH3Pb(1−x)SnxI3 (0≤x≤1) perovskite with high stability and efficiency. The reasons that limit its further efficiency improvement are provided by means of studying the carrier dynamics in the device.

[Full Paper]
Jiandong Fan, Chong Liu, Hongliang Li, Cuiling Zhang, Wenzhe Li, Yaohua Mai
ChemSusChem, August 04, 2017, https://doi.org/10.1002/cssc.201700880 Read article

To Avoid Chasing Incorrect Chemical Structures of Chiral Compounds: Raman Optical Activity and Vibrational Circular Dichroism Spectroscopies

4 agosto, 2017 - 00:00

 Raman Optical Activity and Vibrational Circular Dichroism Spectroscopies

Get it right! A new and convenient approach that involves analysing the spectral similarity overlap of experimental Raman optical activity (ROA) and vibrational circular dichroism (VCD) spectra with those predicted using advanced quantum chemical methods can be used to distinguish between the correct and incorrect chemical structures of chiral compounds.

[Article]
Prasad L. Polavarapu, Cody L. Covington, Vijay Raghavan
ChemPhysChem, August 04, 2017, https://doi.org/10.1002/cphc.201700764 Read article

Molecular Mechanism of Swing Effect in Zeolitic Imidazolate Framework ZIF-8: Continuous Deformation upon Adsorption

4 agosto, 2017 - 00:00

 Continuous Deformation upon Adsorption

The flexibility of zeolitic imidazolate framework ZIF-8 and its “swing” effect are investigated by first-principles molecular dynamics.

[Article]
François-Xavier Coudert
ChemPhysChem, August 04, 2017, https://doi.org/10.1002/cphc.201700463 Read article

Sulfonylureas as Concomitant Insulin Secretagogues and NLRP3 Inflammasome Inhibitors

4 agosto, 2017 - 00:00

Sulfonylureas as Concomitant Insulin Secretagogues and NLRP3 Inflammasome Inhibitors

Pattern recognition: Hybridisation of the potent NLRP3 inhibitor MCC950 with antidiabetic sulfonylureas has created dual mode of action compounds which concomitantly inhibit NLRP3 and stimulate insulin secretion. These hybrids are interesting tool compounds for studying the role of inflammation in type 2 diabetes, promising therapeutics and highlight the ability to functionalise MCC950 with other bioactive motifs to create small-molecule chimeras.

[Full Paper]
James R. Hill, Rebecca C. Coll, Nancy Sue, Janet C. Reid, Jennifer Dou, Caroline L. Holley, Ruby Pelingon, Joshua B. Dickinson, Trevor J. Biden, Kate Schroder, Matthew A. Cooper, Avril A. B. Robertson
ChemMedChem, August 04, 2017, https://doi.org/10.1002/cmdc.201700270 Read article

MnCl<sub>2</sub>-Catalyzed C−H Alkylations with Alkyl Halides

4 agosto, 2017 - 00:00

MnCl2‐Catalyzed C−H Alkylations with Alkyl Halides

No P: Sustainable MnCl2 enabled challenging C−H alkylations under phosphine-free conditions with ample scope through rate-determining C−H metalation, also enabling manganese-catalyzed oxidative C−H methylations.

[Communication]
Weiping Liu, Gianpiero Cera, João C. A. Oliveira, Zhigao Shen, Lutz Ackermann
Chem. Eur. J., August 04, 2017, https://doi.org/10.1002/chem.201703191 Read article

Towards Catalytic Ammonia Oxidation to Dinitrogen: A Synthetic Cycle by Using a Simple Manganese Complex

4 agosto, 2017 - 00:00

 A Synthetic Cycle by Using a Simple Manganese Complex

Store that H2! Oxidation of a simple (salen)Mn≡N resulted in the 6e− nitride coupling reaction, central to NH3 oxidation to N2. A complete synthetic cycle was established with implications for catalytic NH3 oxidation for H2-storage applications. An unusual mixed-valent MnV/MnIII species was also isolated and characterized (see scheme).

[Communication]
Megan Keener, Madeline Peterson, Raúl Hernández Sánchez, Victoria F. Oswald, Guang Wu, Gabriel Ménard
Chem. Eur. J., August 04, 2017, https://doi.org/10.1002/chem.201703153 Read article

Corrigendum: Photoinduced DNA Interstrand Cross-Link Formation by Naphthalene Boronates via a Carbocation

4 agosto, 2017 - 00:00

[Corrigendum]
Yibin Wang, Zechao Lin, Heli Fan, Xiaohua Peng
Chem. Eur. J., August 04, 2017, https://doi.org/10.1002/chem.201703003 Read article

Two Enabling Strategies for the Stereoselective Conversion of Internal Alkynes into Trisubstituted Alkenes

4 agosto, 2017 - 00:00

Two Enabling Strategies for the Stereoselective Conversion of Internal Alkynes into Trisubstituted Alkenes

Your choice: A sequence of ruthenium-catalyzed trans-hydrometalation followed by copper-mediated C-alkylation of the resulting alkenylsilane or stannane products opens a concise entry into trisubstituted alkenes; most notably, the 2-methylbut-2-en-1-ol motif present in countless natural products is well accessible. The key reactive intermediates are formed in situ either by Brook rearrangement or by phosphinate-assisted transmetalation.

[Full Paper]
Nikolas Huwyler, Karin Radkowski, Stephan M. Rummelt, Alois Fürstner
Chem. Eur. J., August 04, 2017, https://doi.org/10.1002/chem.201702470 Read article

Cobalt-Catalyzed <i>ortho</i>-C−H Functionalization/Alkyne Annulation of Benzylamine Derivatives: Access to Dihydroisoquinolines

4 agosto, 2017 - 00:00

Cobalt‐Catalyzed ortho‐C−H Functionalization/Alkyne Annulation of Benzylamine Derivatives: Access to Dihydroisoquinolines

Molecular O2 as the sole oxidant and simple Co(OAc)2 as precatalyst are key features of a practical procedure for the C−H alkenylation/annulation of benzylamine derivatives with both internal and terminal alkynes, thereby enabling the access to dihydroisoquinolines, including chiral, non-racemic derivatives. Valuable insights about the reaction mechanism and presumed Co-species involved in the catalytic cycle are provided.

[Full Paper]
Ángel Manu Martínez, Nuria Rodríguez, Ramón Gómez-Arrayás, Juan C. Carretero
Chem. Eur. J., August 04, 2017, https://doi.org/10.1002/chem.201702283 Read article

Topotactic Synthesis of Porous Cobalt Ferrite Platelets from a Layered Double Hydroxide Precursor and Their Application in Oxidation Catalysis

4 agosto, 2017 - 00:00

Topotactic Synthesis of Porous Cobalt Ferrite Platelets from a Layered Double Hydroxide Precursor and Their Application in Oxidation Catalysis

Topotactic: Porous, crystalline, mosaic platelets of the cobalt ferrite spinel, CoFe2O4, were synthesized by thermal decomposition of a layered double hydroxide precursor. Interesting chemical properties were observed compared to commercial spinel, and were demonstrated by 2-propanol oxidation catalysis and oxygen evolution reaction catalysis.

[Communication]
Klaus Friedel Ortega, Sven Anke, Soma Salamon, Fatih Özcan, Justus Heese, Corina Andronescu, Joachim Landers, Heiko Wende, Wolfgang Schuhmann, Martin Muhler, Thomas Lunkenbein, Malte Behrens
Chem. Eur. J., August 04, 2017, https://doi.org/10.1002/chem.201702248 Read article

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

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

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

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-&#x3C0;-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-&#x3C0;-A systems bearing larger aromatic acceptor moieties, can be attributed to the effective 2D &#x3C0;-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

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 Eri&#x15F;, 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

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

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

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