Organoboron luminophores with extremely strong dual-phase emissions

作     者：Qingsong Liu Man Zhang Ye Fu Shen Shen Liangliang Zhu Qingsong Liu;Man Zhang;Ye Fu;Shen Shen;Liangliang Zhu

作者机构：Department of Macromolecular ScienceState Key Laboratory of Molecular Engineering of PolymersFudan UniversityShanghai 200438China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2023年第34卷第3期

页      面：274-278页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China(No.21975046) partially from the National Key Research and Development Program of China(No.2017YFA0207700) 

主　　题：Organoboron Dual-phase emission Quantum yield Rigid-twisted core Mechanical force 

摘      要：Developing efficient dual-phase emission emitters upon organoboron luminophores remains a formidable challenge due to the ubiquitous self-absorption and deleterious π-π interactions from aromatic ***, a new family of benzothiazole-enolate-based organoboron luminophores(HN1-4) with effective dual-phase emission was constructed. HN4 showed almost the highest quantum yield(QY) among this type of compound so far. The three-ring-fused rigid skeleton and moderate intramolecular charge transfer(ICT) effect ensured that HN4 could give rise to extremely strong emission in any solution(QY up to 99%). X-ray crystallographic analysis showed that the twisted core structure constructed by the boronic coordination of two penta-fluorobenzene of HN4 was responsible for intense emission in the solid state(QY up to 68%). Besides, HN4 exhibited a unique response to mechanical force accompanied by a reversible change of the QY. We believe that this strategy provides beneficial inspiration and methodology to design materials with high emissive quantum yield that can be used in a variety of luminescent events.