A new insight into aggregation structure of organic solids and its relationship to room-temperature phosphorescence effect  

作　　者：Mingxue Gao Jia Ren Yanxiang Gong Manman Fang Jie Yang Zhen Li 

机构地区：[1]Institute of Molecular Aggregation Science,Tianjin University,Tianjin,China [2]Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials,Department of Chemistry,Wuhan University,Wuhan,China [3]Joint School of National University of Singapore and Tianjin University,International Campus of Tianjin University,Fuzhou,China [4]Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan,China

出　　处：《Aggregate》2024年第2期370-377,共8页聚集体（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:52273191,22235006;Natural Science Foundation of Tianjin City,Grant/Award Number:22JCYBJC00760;Open Project Program of Wuhan National Laboratory for Optoelectronics,Grant/Award Number:2020WNLOKF013;starting Grants of Tianjin University and Tianjin Government;Independent Innovation Fund of Tianjin University,Grant/Award Number:2023XPD-0014;Guangzhou AIE Higher Research Institute。

摘　　要：In order to improve the performance of organic luminescent materials,lots of studies have been carried out at the molecular level.However,these materials are mostly applied as solids or aggregates in practical applications,in which the relationship between aggregation structure and luminescent property should be paid more attention.Here,we obtained five phenothiazine 5,5-dioxide(O-PTZ)derivatives with distinct molecular conformations by rational design of chemical structures,and systematically studied their room-temperature phosphorescence(RTP)effect in solid state.It was found that O-PTZ dimers with quasi-equatorial(eq)conformation tended to show strongerπ-πinteraction than quasi-axial(ax)conformers in crystal state,which was more conducive to the generation of RTP.Based on this result,a multi-level structural model of organic solids was proposed to draw the relationship between aggregation structure and RTP effect,just like the research for the structureproperty relationship of proteins.Using this structural model as the guide,boosted RTP efficiency from 1%to 20%was successfully achieved in the corresponding host-guest doping system,showing its wide applicability.

关 键 词：molecular conformation multi-level structural model room-temperature phosphorescence phenothiazine 5 5-dioxide derivatives AGGREGATION 

分 类 号：O62[理学—有机化学]