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Articles from Wiley

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The latest papers in ChemPubSoc Europe
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Self-Assembly Behavior and Application of Terphenyl-Cored Trimaltosides for Membrane-Protein Studies: Impact of Detergent Hydrophobic Group Geometry on Protein Stability

5 agosto, 2019 - 00:00

The geometry of design: A comparative study of two sets of new amphiphiles revealed a large difference in detergent efficacy for membrane-protein stabilization between terphenyl-cored maltosides (TPMs) with bent and linear structures (TPM-Vs and TPM-Ls, respectively; see figure). This result indicates the importance of detergent hydrophobic group geometry in membrane-protein stability.

[Full Papers]
Dr. Muhammad Ehsan, Dr. Yang Du, Jonas S. Mortensen, Dr. Parameswaran Hariharan, Qianhui Qu, Lubna Ghani, Dr. Manabendra Das, Anne Grethen, Prof. Bernadette Byrne, Prof. Georgios Skiniotis, Prof. Sandro Keller, Prof. Claus J. Loland, Prof. Lan Guan, Prof. Brian K. Kobilka, Prof. Pil Seok Chae
doi.org/10.1002/chem.201902468

Evolutionary Algorithm-Based Crystal Structure Prediction for Copper(I) Fluoride

5 agosto, 2019 - 00:00

Ever evolving: Evolutionary crystal structure prediction algorithms combined with dispersion-corrected hybrid density functional calculations yield a large number of new low-energy structural candidates for the unknown copper(I) fluoride.

[Full Papers]
Dr. Mikhail S. Kuklin, Prof. Lorenzo Maschio, Dr. Denis Usvyat, Prof. Dr. Florian Kraus, Prof. Antti J. Karttunen
doi.org/10.1002/chem.201902314

Mechanochemical Pretreatment for Efficient Solvent-Free Synthesis of SSZ-13 Zeolite

5 agosto, 2019 - 00:00

Activation by milling led to the solvent-free synthesis of SSZ-13 zeolite with a huge gain in terms of product/gel ratio. The automatized pretreatment process performed by planetary mill resulted in successful synthesis, whereas the manual mechanochemical approach failed.

[Full Papers]
Dr. Veronika Pashkova, Dr. Kinga Mlekodaj, Dr. Petr Klein, Dr. Libor Brabec, Dr. Radek Zouzelka, Dr. Jiri Rathousky, Dr. Venceslava Tokarova, Dr. Jiri Dedecek
doi.org/10.1002/chem.201902107

Photoinitiated Charge Transfer in a Triangular Silver(I) Hydride Complex and Its Oxophilicity

5 agosto, 2019 - 00:00

Spin, charge, reactivity! The triangular silver(I) hydride complex [Ag3(μ3-H)(μ2-dcpm)3]2+ (dcpm=bis(dicyclohexylphosphino)methane, see figure) features multinuclear coupling between 1H, 31P, and 109Ag/107Ag, and UV-induced hydride-to-Ag3 charge transfer. Electronic transitions have been predicted by high-level electronic structure calculations and experimentally evidenced by the observed photoinduced fragments. ESI-MS revealed activation-specific dissociation pathways.

[Full Papers]
Sebastian V. Kruppa, Cedric Groß, Xin Gui, Florian Bäppler, Björn Kwasigroch, Dr. Yu Sun, Prof. Dr. Rolf Diller, Prof. Dr. Wim Klopper, Prof. Dr. Gereon Niedner-Schatteburg, Dr. Christoph Riehn, Prof. Dr. Werner R. Thiel
doi.org/10.1002/chem.201901981

Optimization of LpxC Inhibitors for Antibacterial Activity and Cardiovascular Safety

5 agosto, 2019 - 00:00

It's not the hydroxamate! Antibacterial LpxC inhibitors have been optimized for enzymatic potency, anti-pseudomonal activity, pharmacokinetics, and cardiovascular safety. We demonstrate that the much-maligned hydroxamic acid is not responsible for the cardiovascular toxicity observed with LpxC inhibitors. The development of a phosphate prodrug enabled high solubility and rapid conversion into active drug upon intravenous administration.

[Full Papers]
Dr. Frederick Cohen, Dr. James B. Aggen, Dr. Logan D. Andrews, Dr. Zahra Assar, Jen Boggs, Dr. Taylor Choi, Dr. Paola Dozzo, Ashton N. Easterday, Dr. Cat M. Haglund, Darin J. Hildebrandt, Melissa C. Holt, Kristin Joly, Dr. Adrian Jubb, Dr. Zeeshan Kamal, Timothy R. Kane, Dr. Andrei W. Konradi, Kevin M. Krause, Martin S. Linsell, Dr. Timothy D. Machajewski, Olga Miroshnikova, Dr. Heinz E. Moser, Dr. Vincent Nieto, Thu Phan, Dr. Craig Plato, Dr. Alisa W. Serio, Julie Seroogy, Dr. Anton Shakhmin, Dr. Adam J. Stein, Dr. Alex D. Sun, Dr. Serguei Sviridov, Zhan Wang, Kenneth Wlasichuk, Dr. Wen Yang, Dr. Xiaoming Zhou, Dr. Hai Zhu, Dr. Ryan T. Cirz
doi.org/10.1002/cmdc.201900287

Photoinduced Energy- and Electron-Transfer Processes in a <i>Side-to-Face</i> Ru<sup>II</sup>-Porphyrin/Perylene-bisimide Array

5 agosto, 2019 - 00:00

A side-to-face array based on perylene bisimide sandwiched between two RuII-porphyrins is prepared and characterized from the photophysical viewpoint, showing a wavelength-dependent behavior. Photoinduced electron transfer takes place upon “red light” excitation of the perylene unit, while energy transfer occurs upon “green light” excitation of the RuII-porphyrin complex.

[Articles]
Dr. Agnese Amati, Dr. Mirco Natali, Prof. Dr. Maria Teresa Indelli, Prof. Dr. Elisabetta Iengo, Prof. Dr. Frank Würthner
doi.org/10.1002/cphc.201900611

Bubble Solution Description by Non-Extensive Thermodynamics: Pressure Effect

5 agosto, 2019 - 00:00

A generalized version of Henry's Law for (nano)bubbles with ill-defined geometrical boundaries is proposed:

[Articles]
Prof. Pierre Letellier, Dr. Mireille Turmine
doi.org/10.1002/cphc.201900412

Coupled Dynamics of Anode and Cathode in Proton-Exchange Membrane Fuel Cells

5 agosto, 2019 - 00:00

An external reference electrode is used to monitor the cathodic potential during the operation of a direct methanol fuel cell and a direct formic acid fuel cell under the regular and oscillatory regimes. Cathodic oscillations synchronized with the cell voltage dynamics, which had not been reported so far for fuel cells, are observed in these systems. The results can be attributed to two main coupling processes, namely, coupling through proton concentration and a global coupling stemming from the control mode (potentiostatic or galvanostatic).

[Articles]
Jéssica A. Nogueira, Prof. Dr. Katharina Krischer, Prof. Dr. Hamilton Varela
doi.org/10.1002/cphc.201900531

Experimental Investigation of the Dynamical Modes of Four Pulse-Coupled Chemical Micro-Oscillators

5 agosto, 2019 - 00:00

Switching between different dynamical modes in a network of four pulse-coupled chemical micro-oscillators is studied.

[Communications]
Ivan S. Proskurkin, Pavel S. Smelov, Prof. Dr. Vladimir K. Vanag
doi.org/10.1002/cphc.201900421

Structure-Tunable Copper-Indium Catalysts for Highly Selective CO<sub>2</sub> Electroreduction to CO or HCOOH

5 agosto, 2019 - 00:00

Get In: Bimetallic copper-indium catalysts were synthesized by using a coprecipitation method. Distinct phase evolutions and product distributions can be achieved with varying metal compositions. The Cu-In catalysts are found to be among the best reported In-based catalysts for electrochemical CO2 reduction to CO or HCOOH, with selectivity depending on structure-sensitive binding strength of key reactive intermediates.

[Communications]
Prof. Minghui Zhu, Dr. Pengfei Tian, Jiayu Li, Jiacheng Chen, Prof. Jing Xu, Prof. Yi-Fan Han
doi.org/10.1002/cssc.201901884

Bio-Inspired Synthesis of Hematite Mesocrystals by Using Xonotlite Nanowires as Growth Modifiers and Their Improved Oxygen Evolution Activity

5 agosto, 2019 - 00:00

A word to the wires: Hematite particles are prepared by using xonotlite nanowires (XNWs) as growth modifiers. The concentrations of XNWs and iron(III) ions can control the morphology and size of the hematite particles. The obtained particles exhibit good catalytic performance in the oxygen evolution reaction, affording a current density of 10 mA cm−2 with an overpotential of 370 mV, a small Tafel slope of 65 mV dec−1, and good stability in alkaline electrolyte.

[Communications]
Dr. Yang-Yi Liu, Fu-Jia Chang, Dr. Huai-Ling Gao, Si-Ming Chen, Prof. Dr. Min-Rui Gao, Dr. Ya-Rong Zheng, Prof. Dr. Helmut Cölfen, Dr. Chuan-Xin He, Prof. Dr. Shu-Hong Yu
doi.org/10.1002/cssc.201900861

Novel Perovskite Materials for Thermal Water Splitting at Moderate Temperature

5 agosto, 2019 - 00:00

Clean hydrogen can be produced through water splitting at moderate temperature (700 °C) by two-step reversible thermochemical cycles based on the perovskite oxides Sr2CoNb1−xTixO6−δ (x=1, 0.7; δ=number of oxygen vacancies). These compounds show outstanding hydrogen yield, making them potentially useful for real applications.

[Full Papers]
Prof. M. Teresa Azcondo, Dr. María Orfila, Prof. Javier Marugán, Prof. Raúl Sanz, Dr. Alvaro Muñoz-Noval, Dr. Eduardo Salas-Colera, Dr. Clemens Ritter, Prof. Flaviano García-Alvarado, Prof. Ulises Amador
doi.org/10.1002/cssc.201901484

Solvent and Counter-Ion Induced Coordination Environment Changes Towards Ag<sup>I</sup> Coordination Polymers

5 agosto, 2019 - 00:00

Silver coordination polymers using the multimodal and flexible 9,9′-bis(4,5-diazafluorene) ligand. Changing coordination and topology by exploiting solvent and counterion effects.

[Communications]
Arvind Kumar Gupta, Daniel Morales Salazar, Andreas Orthaber
doi.org/10.1002/ejic.201900722

Calcium Amido Complexes Coordinated by Tridentate Amidinate Ligands: Synthesis, Structures and Catalytic Activity in Olefin Hydrophosphination and Polymerization of Cyclic Esters

5 agosto, 2019 - 00:00

Heteroleptic calcium amidoamidinate complexes [2-(Ph2P=NPh)C6H4NC(tBu)=N(2,6-R2C6H3)]Ca[N(SiMe3)2](thf) {R = iPr (1); R = Me (2)} catalyze intermolecular hydrophosphination C=C and C≡C bonds and ROP of ε-caprolactone and rac-lactide.

[Full Papers]
Aleksei O. Tolpygin, Anton V. Cherkasov, Georgy K. Fukin, Tatyana A. Kovylina, Konstantin A. Lyssenko, Alexander A. Trifonov
doi.org/10.1002/ejic.201900610

Influence of Hetero-Biaryl Ligands on the Photo-Electrochemical Properties of [Re<sup>I</sup>NCS(N<sup>∩</sup>N)(CO)<sub>3</sub>]-Type Photosensitizers

5 agosto, 2019 - 00:00

A systematic variation of bi-, tri- and tetra-azo substituted diimine ligands reveals pyridazine as a promising scaffold for increased visible absorption, whilst maintaining relatively long lifetimes and quantum yields.

[Full Papers]
Mathias Mosberger, Benjamin Probst, Bernhard Spingler, Roger Alberto
doi.org/10.1002/ejic.201900652

Catalytic Assessment of Copper(I) Complexes and a Polymer Analog towards the One-Pot Synthesis of Imines and Quinoxalines

5 agosto, 2019 - 00:00

Copper(I) complex containing acylthiourea and its heterogeneous counterpart catalyse the synthesis of imines and quinoxalines. Heterogeneous catalyst has the advantage of reusability.

[Full Papers]
Dharmalingam Sindhuja, Punitharaj Vasanthakumar, Nattamai Bhuvanesh, Ramasamy Karvembu
doi.org/10.1002/ejic.201900555

Effects of Arginine Deimination and Citrulline Side-Chain Length on Peptide Secondary Structure Formation

1 agosto, 2019 - 00:00

Citrullination and secondary structure formation: Arginine deimination (citrullination) converts the positively charged guanidinium moiety into a neutral urea group, disfavoring α-helix formation but causing minimal change in β-sheet formation.

[Full Papers]
Po-Yi Wu, Chin-Yi Chen, Jhe-Hao Li, Jin-Kai Lin, Ting-Hsuan Chen, Dr. Shing-Jong Huang, Shou-Ling Huang, Prof. Richard P. Cheng
doi.org/10.1002/cbic.201900231

Automatic Full Glycan Structural Determination through Logically Derived Sequence Tandem Mass Spectrometry

1 agosto, 2019 - 00:00

One fragment at a time: A logical sequence for tandem mass spectrometry is derived based on an understanding of oligosaccharide dissociation mechanisms in a mass spectrometer. This sequence, which enables the linkage positions, anomeric configurations, and monosaccharide constituents of oligosaccharides to be determined efficiently, can be coded into a computer-controlled mass spectrometer for automatic structural determination.

[Full Papers]
Dr. Shang-Ting Tsai, Chia Yen Liew, Dr. Chen Hsu, Shih-Pei Huang, Wei-Chien Weng, Yu-Hsiang Kuo, Prof. Dr. Chi-Kung Ni
doi.org/10.1002/cbic.201900228

Dynamic Synthetic Cells Based on Liquid-Liquid Phase Separation

1 agosto, 2019 - 00:00

Emergence of autonomous protocells on the early Earth: Liquid-liquid phase separation processes in water offer great promise for the bottom-up assembly of synthetic cell models based on membrane-free microdroplets. This Minireview highlights the dynamic properties of such liquid-like droplets that make them relevant models for approaching the dynamic complexity of living matter.

[Minireviews]
Dr. Nicolas Martin
doi.org/10.1002/cbic.201900183

Aqueous-Phase Selective Oxidation of Methane with Oxygen over Iron Salts and Pd/C in the Presence of Hydrogen

1 agosto, 2019 - 00:00

Methane-to-Oxygenates: Aqueous-phase selective oxidation of methane with molecular oxygen under mild conditions was successfully demonstrated using iron salts and Pd/C in the presence of molecular hydrogen

[Communications]
Jongkyu Kang, Prof. Eun Duck Park
doi.org/10.1002/cctc.201900919

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