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361.
Zheng Xu Shitong Li Fangfang Huang Tengfei He Xinyuan Jia Huazhe Liang Yaxiao Guo Guankui Long Bin Kan Zhaoyang Yao Chenxi Li Xiangjian Wan Yongsheng Chen 《Angewandte Chemie (International ed. in English)》2023,62(49):e202311686
Two exotic 6-cantilever small molecular platforms, characteristic of quite different molecular configurations of propeller and quasi-plane, are established by extremely two-dimensional conjugated extension. When applied in small molecular acceptors, the only two cases of CH25 and CH26 that could contain six terminals and such broad conjugated backbones have been afforded thus far, rendering featured absorptions, small reorganization and exciton binding energies. Moreover, their distinctive but completely different molecular geometries result in sharply contrasting nanoscale film morphologies. Finally, CH26 contributes to the best device efficiency of 15.41 % among acceptors with six terminals, demonstrating two pioneered yet highly promising 6-cantilever molecular innovation platforms. 相似文献
362.
Dr. Hongtai Li Pei Shi Lei Wang Tianran Yan Tong Guo Xiao Xia Prof. Chi Chen Prof. Jing Mao Prof. Dan Sun Prof. Liang Zhang 《Angewandte Chemie (International ed. in English)》2023,62(8):e202216286
Fundamentally understanding the structure–property relationship is critical to design advanced electrocatalysts for lithium-sulfur (Li−S) batteries, which remains a formidable challenge. Herein, by manipulating the regulable cations in spinel oxides, their geometrical-site-dependent catalytic activity for sulfur redox is investigated. Experimental and theoretical analyses validate that the modulation essence of cooperative catalysis of lithium polysulfides (LiPSs) is dominated by LiPSs adsorption competition between Co3+ tetrahedral (Td) and Mn3+ octahedral (Oh) sites on Mn3+Oh−O−Co3+Td backbones. Specifically, high-spin Co3+Td with stronger Co−S covalency anchors LiPSs persistently, while electron delocalized Mn3+Oh with adsorptive orbital (dz2) functions better in catalyzing specialized LiPSs conversion. This work inaugurates a universal strategy for sculpting geometrical configuration to achieve charge, spin, and orbital topological regulation in electrocatalysts for Li−S batteries. 相似文献
363.
Hai-Jie Wang Prof. Dr. Yuan Liu Baoqiu Yu Shi-Quan Song Prof. Dr. You-Xuan Zheng Dr. Kanglei Liu Prof. Dr. Pangkuan Chen Prof. Dr. Hailong Wang Prof. Dr. Jianzhuang Jiang Prof. Dr. Tian-Yi Li 《Angewandte Chemie (International ed. in English)》2023,62(7):e202217195
Thermally activated delayed fluorescence (TADF) from linear two-coordinate coinage metal complexes is sensitive to the geometric arrangement of the ligands. Herein we realize the tuning of configuration from coplanar to orthogonal gradually by variation of substituents. In a complex with confined twist configuration, its blue emission peaking at 458 nm presents a high ΦPL of 0.74 and a short τTADF of 1.9 μs, which indicates a fast enough kr,TADF of 3.9×105 s−1 and a depressed knr of 1.4×105 s−1. Such outstanding luminescent properties are attributed to the proper overlap of HOMO and LUMO on CuI d orbitals that guarantees not only small ΔEST but also sufficient transition oscillator strength for fast . Vacuum-deposited blue OLEDs with either doped or host-free emissive layer present external quantum efficiencies over 20 % and 10 %, respectively, demonstrating the practicality of the configurationally confined strategy for efficient linear CuI TADF emitters. 相似文献