Photocatalyst size controls electron and energy transfer: selectable E/Z isomer synthesis via C–F alkenylation
作者:A. Singh、C. J. Fennell、J. D. Weaver
DOI:10.1039/c6sc02422j
日期:——
Photocatalytic alkene synthesis can involve electron and energy transfer processes. The structure of the photocatalyst can be used to control the rate of the energy transfer, providing a mechanistic handle...
Facile Construction of New Hybrid Conjugation via Boron Cage Extension
作者:Fangxiang Sun、Shuaimin Tan、Hou-Ji Cao、Chang-sheng Lu、Deshuang Tu、Jordi Poater、Miquel Solà、Hong Yan
DOI:10.1021/jacs.2c12526
日期:2023.2.15
Aromatic polycyclic systems have been extensively utilized as structural subunits for the preparation of various functional molecules. Currently, aromatics-based polycyclic systems are predominantly generated from the extension of two-dimensional (2D) aromatic rings. In contrast, polycyclic compounds based on the extension of three-dimensional (3D) aromatics such as boron clusters are less studied
芳香族多环体系已被广泛用作制备各种功能分子的结构亚基。目前,基于芳烃的多环体系主要由二维 (2D) 芳环的延伸产生。相比之下,基于硼簇等三维 (3D) 芳烃延伸的多环化合物研究较少。在这里,我们报告了三种类型的硼簇核三环分子系统,它们由一个 2D 芳环、一个 3D 芳族尼多构成-碳硼烷和炔烃。这些新的三环化合物可以通过 Pd 催化的 B-H 活化以及随后的碳硼烷和吡啶与炔烃的级联杂环化反应轻松获得,在温和条件下无需任何添加剂,分离产率高达 85%。计算结果表明,由 3D 碳硼烷、2D 吡啶环和炔烃融合生成的新环是非芳香族的。然而,这种融合不仅导致1由于嵌入式碳硼烷的强偏斜环电流,H 化学位移显着向下场移动,但也致力于新的/改进的物理化学性质,包括增加的热稳定性,新吸收带的出现,以及大部分红移的发射带和增强的发射效率。此外,获得了许多跨越所有可见光的明亮、颜色可调的固体发射体,绝对发光效率高达
Dikusar, E. A.; Koval'skaya, S. S.; Vashkevich, E. V., Russian Journal of General Chemistry, 1999, vol. 69, # 11, p. 1732 - 1735
作者:Dikusar, E. A.、Koval'skaya, S. S.、Vashkevich, E. V.、Kozlov, N. G.、Potkin, V. I.、Moiseichuk, K. L.