Aggregation-induced emission or aggregation-caused quenching? Impact of covalent bridge between tetraphenylethene and naphthalimide
作者:Xiaoxie Ma、Weijie Chi、Xie Han、Chao Wang、Shenghua Liu、Xiaogang Liu、Jun Yin
DOI:10.1016/j.cclet.2020.12.031
日期:2021.5
classical AIEgen) and naphthalimide (NI, a popular fluorophore with ACQ characteristics) were connected through non-conjugated linkages and conjugated linkages. We showed that the nonconjugated-linkage of TPE to NI fragments leads to substantial PET in molecular aggregates and ACQ. In contrast, the conjugated connection between TPE and NI moieties results in the AIE phenomenon by suppressing twisted intramolecular
了解控制聚集诱发发射(AIE)和聚集引起的猝灭的物理机制在开发功能性AIE材料中起着至关重要的作用。在这项工作中,四苯基乙烯(TPE,经典的AIEgen)和萘二甲酰亚胺(NI,具有ACQ特性的流行荧光团)通过非共轭键和共轭键连接。我们表明,TPE与NI片段的非共轭连接导致分子聚集体和ACQ中的大量PET。相反,TPE和NI部分之间的共轭连接通过抑制扭曲的分子内电荷转移而导致AIE现象。这项工作为AIE材料的合理设计提供了重要的指导。