Results 81 to 90 of about 2,064,816 (279)

Atroposelective Arene‐Forming Alkene Metathesis**

Angewandte Chemie, Volume 134, Issue 51, December 19, 2022., 2022
The feasibility of alkene metathesis to catalytically control stereogenic axes by traceless arene formation is reported. Key to the process is a selective conversion of stereodynamic trienes by a chiral molybdenum catalyst, providing configurationally‐stable atropisomers under mild conditions in excellent yields with up to 98 : 2 e.r.
Zlatko Jončev, Christof Sparr
wiley   +2 more sources

The O2-Evolving Complex of Photosystem II: Recent Insights from Quantum Mechanics/Molecular Mechanics (QM/MM), Extended X-ray Absorption Fine Structure (EXAFS), and Femtosecond X-ray Crystallography Data.

Accounts of Chemical Research, 2017
Efficient photoelectrochemical water oxidation may open a way to produce energy from renewable solar power. In biology, generation of fuel due to water oxidation happens efficiently on an immense scale during the light reactions of photosynthesis.
M. Askerka, G. Brudvig, V. Batista
semanticscholar   +1 more source

Enhanced Electromechanical Response in 1D Hybrid Perovskites: Coexistence of Normal and Relaxor Ferroelectric Phases

Advanced Functional Materials, EarlyView.
The dynamic polarization reversal of coexisting normal and relaxor ferroelectrics in 1D TMAPbI₃ (tetramethylammonium, TMA) is deciphered through combined experimental and theoretical approaches. By bridging atomic‐scale motion, macroscopic polarization switching, and depolarization effects, a universal methodology is established to engineer next ...
Chen Xue, Masaru Fujibayashi, Hengming Huang, Chisato Kato, Katsuya Ichihashi, Jun Manabe, Sadafumi Nishihara, Xiao‐Ming Ren, Takayoshi Nakamura   +8 more
wiley   +1 more source

Rapid and Scalable Halosulfonylation of Strain‐Release Reagents**

Angewandte Chemie, Volume 135, Issue 3, January 16, 2023., 2023
A one‐pot halosulfonylation of strained hydrocarbons is described that proceeds under practical, scalable and mild conditions. Sulfonyl halides featuring aryl, heteroaryl and alkyl substituents are generated in situ from sulfinate salts and convenient halogen atom sources. This chemistry enables the synthesis of an array of halogen/sulfonyl‐substituted
Helena D. Pickford, Vasyl Ripenko, Ryan E. McNamee, Serhii Holovchuk, Amber L. Thompson, Russell C. Smith, Pavel K. Mykhailiuk, Edward A. Anderson   +7 more
wiley   +2 more sources

Solid state NMR and X-ray diffraction studies of α-d-galacturonic acid monohydrate [PDF]

, 2002
Crystalline a-d-galacturonic acid monohydrate has been studied by 13C CPMAS NMR and X-ray crystallography. The molecular dynamics were investigated by evaluating 13C spin-lattice relaxation in the rotating frame (T1?) and chemical-shift-anisotropy ...
Brett, David L Hughes, Foster, Fyfe, Ha, Ha, Harris, Hartmann, Herzfeld, Hui-Ru Tang, Lamba, Liu, Matsuhiro, Peter S Belton, Pines, Ramos, Sastry, Sheldrick, Sherwood, Sian C Davies, Tang, Tang, Tang, Tang, Tang, Tang, Thanomkul, Torchia, Witkowski   +28 more
core   +1 more source

A convolutional neural network-based screening tool for X-ray serial crystallography

Journal of Synchrotron Radiation, 2018
Deep learning provides one possible avenue to reduce the data stream generated by serial macromolecular X-ray crystallography. Convolutional neural networks can be trained to recognize the presence or absence of Bragg spots, forming a criterion to veto ...
Tsung-Wei Ke, A. Brewster, Stella X. Yu, D. Ushizima, Chao Yang, N. Sauter   +5 more
semanticscholar   +1 more source

“Writing” Crystal Phases in Amorphous Calcium Carbonate via Laser‐Induced Patterned Transformations

Advanced Functional Materials, EarlyView.
Laser‐induced crystallization enabling the patterning of amorphous calcium carbonate into various distinct phases is introduced. This approach provides spatial control over polymorph selection, both crystalline and amorphous, inspired by biomineralization pathways.
Hadar Shaked, Iryna Polishchuk, Niv Ben‐Arie, Daniela Dobrynin, Javier Gainza, Alexander Katsman, Boaz Pokroy   +6 more
wiley   +1 more source

Stabilizing Cobalt‐free Li‐rich Layered Oxide Cathodes through Oxygen Lattice Regulation by Two‐phase Ru Doping

Angewandte Chemie, Volume 135, Issue 5, January 26, 2023., 2023
This work comprehensively studies the mechanistic behaviour of cobalt‐free Li1.2Ni0.2Mn0.6O2 and demonstrates the positive impact of two‐phase Ru doping on voltage decay using the combination of in operando and post‐mortem synchrotron analyses. A mechanistic transition from a C2/c phase to a R m phase is reported for the first time.
Yameng Fan, Emilia Olsson, Gemeng Liang, Zhijie Wang, Anita M. D'Angelo, Bernt Johannessen, Lars Thomsen, Bruce Cowie, Jingxi Li, Fangli Zhang, Yunlong Zhao, Wei Kong Pang, Qiong Cai, Zaiping Guo   +13 more
wiley   +2 more sources

Structural Chemistry of Halide including Thallides A8Tl11X1−n (A = K, Rb, Cs; X = Cl, Br; n = 0.1–0.9)

Crystals, 2018
A8Tl11 (A = alkali metal) compounds have been known since the investigations of Corbett et al. in 1995 and are still a matter of current discussions as the compound includes one extra electron referred to the charge of the Tl117− cluster.
Stefanie Gärtner, Susanne Tiefenthaler, Nikolaus Korber, Sabine Stempfhuber, Birgit Hischa   +4 more
doaj   +1 more source

Serial Electron Diffraction Data Processing with diffractem and CrystFEL [PDF]

arXiv, 2020
Serial electron diffraction (SerialED) is an emerging technique, which applies the snapshot data-collection mode of serial X-ray crystallography to three-dimensional electron diffraction (3D ED), forgoing the conventional rotation method. Similarly to serial X-ray crystallography, this approach leads to almost complete absence of radiation damage ...
arxiv