Results 301 to 310 of about 280,815 (357)

Steric Hindrance Engineering to Modulate the Closed Pores Formation of Polymer-Derived Hard Carbon for High-Performance Sodium-Ion Batteries.

Angewandte Chemie
The closed pores play a critical role in improving the sodium storage capacity of hard carbon (HC) anode, however, their formation mechanism as well as the efficient modulation strategy at molecular level in the polymer-derived HCs is still lacking.
Jianhao Lin, Qingfeng Zhou, Zhishan Liao, Yunhua Chen, Yike Liu, Qiang Liu, Xunhui Xiong   +6 more
semanticscholar   +1 more source

Highly Reversible Zn-Air Batteries Enabled by Tuned Valence Electron and Steric Hindrance on Atomic Fe-N4-C Sites.

Nano letters (Print)
The bifunctional oxygen electrocatalyst is the Achilles' heel of achieving robust reversible Zn-air batteries (ZABs). Herein, durable bifunctional oxygen electrocatalysis in alkaline media is realized on atomic Fe-N4-C sites reinforced by NixCo3-xO4 ...
Huanran Zheng, Danni Deng, Xinran Zheng, Yingbi Chen, Yu Bai, Mengjie Liu, Jiabi Jiang, Haitao Zheng, Yuchao Wang, Jinxian Wang, Peiyao Yang, Yu Xiong, Xiang Xiong, Yongpeng Lei   +13 more
semanticscholar   +1 more source

Synergetic Modulation of Steric Hindrance and Excited State for Anti-Quenching and Fast Spin-Flip Multi-Resonance Thermally Activated Delayed Fluorophore.

Angewandte Chemie
Multi-resonance thermally activated delayed fluorescence (MR-TADF) materials hold great promise for advanced high-resolution organic light-emitting diode displays. However, persistent challenges, such as severe aggregation-caused quenching (ACQ) and slow
Jia‐Ming Jin, Denghui Liu, Wen‐Cheng Chen, Chengxiang Shi, Guowei Chen, Xiaofeng Wang, Longjiang Xing, Weidong Yin, Shaomin Ji, Y. Huo, Shi-jian Su   +10 more
semanticscholar   +1 more source

Activation of MOF Catalysts with Low Steric Hindrance via Undercoordination Chemistry for Efficient Polysulfide Conversion in Lithium–Sulfur Battery

Advanced Energy Materials
Lithium–sulfur (Li–S) batteries promise high theoretical energy density and cost‐effectiveness but grapple with challenges like the polysulfide shuttle effect and sluggish kinetics.
Jiayi Wang, Xiaomin Zhang, Xingbo Wang, Jiabing Liu, Shibin Li, Y. Nie, Kai Zong, Xiaoyu Zhang, Hao Meng, Mingliang Jin, Lin Yang, Xin Wang, Zhongwei Chen   +12 more
semanticscholar   +1 more source

Energetic descriptors of steric hindrance in real space: an improved IQA picture.

ChemPhysChem, 2021
Steric hindrance (SH) plays a central role in the modern chemical narrative, lying at the core of chemical intuition. As it however happens with many successful chemical concepts , SH lacks an underlying physically sound root, and multiple mutually ...
Miguel Gallegos, A. Costales, Á. Pendás   +2 more
semanticscholar   +1 more source

Unraveling the Mechanism of Near-Infrared Thermally Activated Delayed Fluorescence of TPA-Based Molecules: Effect of Hydrogen Bond Steric Hindrance.

Journal of Physical Chemistry A, 2021
A recently synthesized novel molecule (named CAT-1) exhibits intriguing near-infrared (NIR) thermally activated delayed fluorescence (TADF) close to 1000 nm wavelength; however, the mechanism behind these intrinsic properties is not fully understood ...
Can Leng, Sheng You, Yubing Si, Haimei Qin, Jie Liu, Wei‐Qing Huang, Keqin Li   +6 more
semanticscholar   +1 more source

Steric hindrance in substituted dibenzofurans

Journal of the Chemical Society, Perkin Transactions 2, 1977
Ten alkyl-substituted dibenzofurans (3) have been synthesized by irridiation of the corresponding diphenyl ethers (4). 13C Chemical shift analysis indicates that some of the highly substituted compounds (3d, g–i) are probably twisted out of the molecular plane due to steric interaction of the substituents in the 1 and 9 positions.
Klaus-Peter Zeller, Stefan Berger
openaire   +1 more source

Optimizing Molecular Packing via Steric Hindrance for Reducing Non-Radiative Recombination in Organic Solar Cells.

Angewandte Chemie
Innovative molecule design strategy holds promise for the development of next-generation acceptor materials for efficient organic solar cells with low non-radiative energy loss (ΔEnr). In this study, we designed and prepared three novel acceptors, namely
Junzhen Ren, Shaoqing Zhang, Zhihao Chen, Tao Zhang, Jiawei Qiao, Jingwen Wang, Lijiao Ma, Yang Xiao, Zi Li, Jianqiu Wang, Xiaotao Hao, Jianhui Hou   +11 more
semanticscholar   +1 more source

NIR-II Fluorescence Sensor Based on Steric Hindrance Regulated Molecular Packing for In Vivo Epilepsy Visualization.

Angewandte Chemie
Fluorescence sensing is crucial to study biological processes and diagnose diseases, especially in the second near-infrared (NIR-II) window with reduces background signals.
Mengyao Zhao, Weiping Lai, Benhao Li, Tianwen Bai, Chunyan Liu, Yanfei Lin, Shixuan An, Longhua Guo, Lei Li, Jianbo Wang, Fan Zhang   +10 more
semanticscholar   +1 more source

Steric Hindrance in Vinyl-Mesitylene

Nature, 1948
A NUMBER of workers have observed various anomalous properties in nuclear-substituted derivatives of mesitylene, such anomalies usually being ascribed to restricted rotation about the bond connecting the substituent to the benzene ring caused by the two ortho-methyl - groups.
F. R. BUCK, G. T. KENNEDY, F. MORTON, E. M. TANNER   +3 more
openaire   +1 more source