Zhang Liming, Luo Zhishan, Wang Wei, Liu Yulian, He Xin, Quan Zewei
School of Chemistry and Chemical Engineering, Harbin Institute of Technology (HIT), Harbin, Heilongjiang 150001, China.
Department of Chemistry and Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong 518055, China.
Inorg Chem. 2022 Sep 19;61(37):14857-14863. doi: 10.1021/acs.inorgchem.2c02438. Epub 2022 Sep 6.
Zero-dimensional hybrid metal halides (0D HMHs) are attractive due to their intriguing self-trapped exciton (STE) emission properties. However, the effect of organic cations on the emission of 0D HMHs is relatively underexplored. Herein, we report two types of 0D hybrid tin bromides, (BMe)SnBr (BMe = CNH) and (MeH)SnBr (MeH = CNH), which share similar structural features with different hydrogen bonding (HB) interactions between [SnBr] anions and organic cations. The (BMe)SnBr with weak HB interactions exhibits only STE emission, while the (MeH)SnBr exhibits both STE and charge transfer exciton emissions owing to the strong HB interactions, resulting in an excitation-dependent emission at cryogenic conditions. Detailed structural analyses and Hirshfeld surface calculations confirm that the enhanced HB interactions are essential to obtain the multiple emissions in (MeH)SnBr.
零维混合金属卤化物（0D HMHs）因其有趣的自陷激子（STE）发射特性而备受关注。然而，有机阳离子对0D HMHs发射的影响相对较少被研究。在此，我们报道了两种类型的零维混合溴化锡，(BMe)SnBr（BMe = CNH）和(MeH)SnBr（MeH = CNH），它们具有相似的结构特征，[SnBr]阴离子与有机阳离子之间存在不同的氢键（HB）相互作用。具有弱HB相互作用的(BMe)SnBr仅表现出STE发射，而由于强HB相互作用，(MeH)SnBr同时表现出STE和电荷转移激子发射，导致在低温条件下出现依赖于激发的发射。详细的结构分析和 Hirshfeld 表面计算证实，增强的HB相互作用对于在(MeH)SnBr中获得多重发射至关重要。
