Wide‐range color‐tunable afterglow emission by the modulation of triplet exciton transition processes based on buckybowl structure

Author:

Zhang Yongfeng1ORCID,Xiong Chenchen1,Wang Wenbo2,Dai Wenbo1,Ren Yue1,Xia Junming1,Li Gengchen1,Shi Jianbing1,Tong Bin1,Zheng Xiaoyan3,Shao Xiangfeng2,Cai Zhengxu1ORCID,Dong Yuping1

Affiliation:

1. Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and Engineering Beijing Institute of Technology Beijing China

2. State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering Lanzhou University Lanzhou China

3. Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing China

Abstract

AbstractBuckybowl structures as non‐uniform electrostatic potential distributions of polycyclic aromatic materials show a unique photoelectric performance. In this work, OTC was utilized for dynamic modulation of triplet exciton transition processes. Five host molecules with different functional units were selected, thus providing different intermolecular interactions in the host/guest systems. Therefore, the delayed emissions were regulated from 536 to 624 nm via the tuning of the triplet exciton transition processes of OTC in different hosts. Experimental data and theoretical calculations revealed that the varied triplet transition behaviors resulted from the competition between the intersystem crossing (ISC) process of OTC‐monomer and the reverse intersystem crossing (RISC) process of OTC‐aggregates. This work proves the superior structure of buckybowl‐based luminophore for controlling triplet exciton transition processes and supplies a new perspective for persistent afterglow luminophore design.

Publisher

Wiley

Subject

General Medicine,General Chemistry

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