Organic Cation-Directed Modulation of Emissions in Zero-Dimensional Hybrid Tin Bromides

Liming Zhang; Zhishan Luo; Wei Wang; Yulian Liu; Xin He; Zewei Quan

doi:10.1021/acs.inorgchem.2c02438

Organic Cation-Directed Modulation of Emissions in Zero-Dimensional Hybrid Tin Bromides

Inorg Chem. 2022 Sep 19;61(37):14857-14863. doi: 10.1021/acs.inorgchem.2c02438. Epub 2022 Sep 6.

Authors

Liming Zhang^{1

2}, Zhishan Luo², Wei Wang², Yulian Liu², Xin He², Zewei Quan²

Affiliations

¹ School of Chemistry and Chemical Engineering, Harbin Institute of Technology (HIT), Harbin, Heilongjiang 150001, China.
² Department of Chemistry and Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong 518055, China.

PMID: 36067388
DOI: 10.1021/acs.inorgchem.2c02438

Abstract

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)₂SnBr₆ (BMe = C₈N₂H₁₈) and (MeH)₂SnBr₆ (MeH = C₇N₂H₁₆), which share similar structural features with different hydrogen bonding (HB) interactions between [SnBr₆]^4- anions and organic cations. The (BMe)₂SnBr₆ with weak HB interactions exhibits only STE emission, while the (MeH)₂SnBr₆ 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)₂SnBr₆.