Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Tallahassee, FL, 32310, USA.
Key Laboratory of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education), Department of Physics, Beihang University, Beijing, 100191, China.
Angew Chem Int Ed Engl. 2018 Jan 22;57(4):1021-1024. doi: 10.1002/anie.201710383. Epub 2017 Dec 21.
The synthesis and characterization is reported of (C NH ) SnBr , a novel organic metal halide hybrid with a zero-dimensional (0D) structure, in which individual seesaw-shaped tin (II) bromide anions (SnBr ) are co-crystallized with 1-butyl-1-methylpyrrolidinium cations (C NH ). Upon photoexcitation, the bulk crystals exhibit a highly efficient broadband deep-red emission peaked at 695 nm, with a large Stokes shift of 332 nm and a high quantum efficiency of around 46 %. The unique photophysical properties of this hybrid material are attributed to two major factors: 1) the 0D structure allowing the bulk crystals to exhibit the intrinsic properties of individual SnBr species, and 2) the seesaw structure enabling a pronounced excited state structural deformation as confirmed by density functional theory (DFT) calculations.
报告了（C NH ）SnBr 的合成与表征，这是一种具有零维（0D）结构的新型有机金属卤化物杂化物，其中独立的跷跷板状二价锡（II）溴化物阴离子（SnBr ）与 1-丁基-1-甲基吡咯烷阳离子（C NH ）共结晶。在光激发下，块状晶体表现出高效的宽带深红色发射，峰值在 695nm，具有 332nm 的大斯托克斯位移和约 46%的高量子效率。这种混合材料的独特光物理性质归因于两个主要因素：1）0D 结构允许块状晶体表现出单个 SnBr 物种的固有性质，2）跷跷板结构使激发态结构变形明显，这一点得到了密度泛函理论（DFT）计算的证实。
