Results 291 to 300 of about 280,815 (357)

Inhibition of Amyloid Nucleation by Steric Hindrance

The Journal of Physical Chemistry B, 2022
Despite recent experiments and simulations suggesting that small-molecule inhibitors and some post-translational modifications (e.g., glycosylation and ubiquitination) can suppress the pathogenic aggregation of proteins due to steric hindrance, the effect of steric hindrance on amyloid formation has not been systematically studied. Based on Monte Carlo
Kai Wu, Wuxuepeng Sun, Dechang Li, Jiajie Diao, Peng Xiu   +4 more
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Calculation of Steric Hindrance

Nature, 1942
IT seems possible to account for the steric effect of non-reacting groups on substitution rates on the lines of the following scheme, illustrated here by the example of the symmetrical substitution of t-butyl chloride by chlorine ions: In the transition state, the four t-butyl carbons will be co-planar and the methyl groups will cause least obstruction
A. G. EVANS, M. POLANYI
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Ultrafast Carrier Dynamics of Non-fullerene Acceptors with Different Planarity: Impact of Steric Hindrance.

Journal of Physical Chemistry Letters, 2022
Most high-performance non-fullerene acceptors are of the acceptor-donor-acceptor (A-D-A)-type structure. Under photoexcitation, the intramolecular charge transfer effect on the A-D-A framework results in a large dipole moment change, facilitating the ...
Guangliu Ran, Johar Zeb, Hao Lu, Yahui Liu, Andong Zhang, Lexuan Wang, Zhishan Bo, Wenkai Zhang   +7 more
semanticscholar   +1 more source

Quantum Mechanical Size and Steric Hindrance

The Journal of Physical Chemistry A, 2006
A quantum mechanical definition of molecular size and shape is formulated from the electronic second moment of the Hartree-Fock wave function. The shape tensor is defined to be invariant with respect to the origin. The geometric average of the eigenvalues of the tensor correlates very well with van der Waals and Bragg-Slater radii.
Joshua W, Hollett, Aaron, Kelly, Raymond A, Poirier   +2 more
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Charge Density Overcomes Steric Hindrance of Ferrocene Surfactant in Switchable Oil-in-Dispersion Emulsions.

Angewandte Chemie, 2022
A ferrocene surfactant can be switched between single and double head form (FcN+C12/Fc+N+C12) triggered by redox reactions. FcN+C12 can neither stabilize an O/W emulsion alone nor an oil-in-dispersion emulsion in combination with alumina nanoparticles ...
Yunshan Liu, Haojie Zhang, Wanqing Zhang, B. Binks, Z. Cui, Jianzhong Jiang   +5 more
semanticscholar   +1 more source

Molecular Engineering of Near‐Infrared‐II Photosensitizers with Steric‐Hindrance Effect for Image‐Guided Cancer Photodynamic Therapy

Advanced Functional Materials, 2021
The design of photosensitizers (PSs) with fluorescence in the second near‐infrared (NIR‐II, 1000–1700 nm) window remains a challenge, as the introduction of donor or acceptor units with excessively strong electron‐withdrawing or donating ability leads to
Shuai Gao, Shengjia Yu, Yongming Zhang, Aihua Wu, Sihang Zhang, Guoguang Wei, Hao Wang, Zeyu Xiao, Wei Lu   +8 more
semanticscholar   +1 more source

Steric hindrance of acetophosphides

Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1968
1. The introduction of a bulky substituent at the carbonyl group in acetophosphides invokes steric hindrance to the existence of the cis isomer. 2. The low-frequency peak νCO in the IR spectra of acetophosphides is due to the trans isomer.
R. G. Kostyanovskii, V. V. Yakshin, S. L. Zimont, I. I. Chervin   +3 more
openaire   +1 more source

Effect of Steric Hindrance of Butylammonium Iodide as Interface Modification Materials on the Performance of Perovskite Solar Cells

Solar RRL, 2022
The efficiency and stability of perovskite solar cells (PSCs) can be effectively improved by interfacial modification with butylammonium iodide (BAI). However, the steric hindrance of BAI is not explored.
Xusheng Zhao, Jun Dong, Daofu Wu, Jun’an Lai, Cunyun Xu, Yanqing Yao, Xiude Yang, Xiaosheng Tang, Q. Song   +8 more
semanticscholar   +1 more source

Sugar Alcohols Induced Steric Hindrance Modulation Boosting Unconventional Zn(101) Facet Texture Anode

Advanced Energy Materials
The electrode/electrolyte interfacial side reaction is a critical issue for aqueous zinc ion batteries (ZIBs). In this study, it presents an innovative electrolyte designed to utilize steric hindrance effects to modulate Zn ion deposition behavior while ...
Yuao Wang, Shibin Li, Penghui Cui, K. Ye, Xin Wang, D. Cao, Kai Zhu   +6 more
semanticscholar   +1 more source

Steric-hindrance Effect Tuned Ion Solvation Enabling High Performance Aqueous Zinc Ion Batteries.

Angewandte Chemie
Despite many additives have been reported for aqueous zinc ion batteries, steric- hindrance effect of additives and its correlation with Zn2+ solvation structure have been rarely reported. Herein, large-sized sucrose biomolecule is selected as a paradigm
Haozhen Dou, Xinru Wu, Mi Xu, Renwu Feng, Qianyi Ma, Dan Luo, Kai Zong, Xin Wang, Zhongwei Chen   +8 more
semanticscholar   +1 more source