Zhou Shuigen, Zhou Lei, Chen Yihao, Shen Wei, Li Ming, He Rongxing
Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
J Phys Chem Lett. 2022 Sep 22;13(37):8717-8724. doi: 10.1021/acs.jpclett.2c02413. Epub 2022 Sep 12.
Improving the photoluminescence (PL) efficiency of organic luminescent molecules is still a great challenge. Herein, a novel zero-dimensional Sn(IV)-based halide (CHN)SnCl is prepared by assembling inactive quinoline cations and stable [SnCl] polyhedra. Experimental characterizations and theoretical calculations show that the blue emission of (CHN)SnCl centered at 433 nm is derived from the organic cations. Surprisingly, the PL efficiency of the as-prepared halide is nearly 50 times higher than that of the organic precursor and exhibits ultrahigh stability. Structural analysis shows that the introduction of inorganic clusters regulates the stacking mode of organic components and forms hydrogen bonds. This strong intermolecular interaction enhances the structural rigidity of (CHN)SnCl, inhibits concentration quenching and vibrational dissipation, and thus significantly improves the PL efficiency and stability of the organic cations. This work provides an important way to improve the PL performance and stability of organic species by constructing efficient intermolecular interactions.
提高有机发光分子的光致发光（PL）效率仍然是一个巨大的挑战。在此，通过组装惰性喹啉阳离子和稳定的[SnCl]多面体，制备了一种新型的零维基于Sn(IV)的卤化物(CHN)SnCl。实验表征和理论计算表明，(CHN)SnCl在433 nm处的蓝色发射源于有机阳离子。令人惊讶的是，所制备卤化物的PL效率比有机前驱体高出近50倍，并表现出超高的稳定性。结构分析表明，无机簇的引入调节了有机组分的堆积模式并形成了氢键。这种强分子间相互作用增强了(CHN)SnCl的结构刚性，抑制了浓度猝灭和振动耗散，从而显著提高了有机阳离子的PL效率和稳定性。这项工作为通过构建有效的分子间相互作用来提高有机物种的PL性能和稳定性提供了一条重要途径。
