Premium
Transient and Persistent Room‐Temperature Mechanoluminescence from a White‐Light‐Emitting AIEgen with Tricolor Emission Switching Triggered by Light
Author(s) -
Li JianAn,
Zhou Jinghong,
Mao Zhu,
Xie Zongliang,
Yang Zhan,
Xu Bingjia,
Liu Cong,
Chen Xin,
Ren Dingyang,
Pan Hui,
Shi Guang,
Zhang Yi,
Chi Zhenguo
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201800762
Subject(s) - mechanoluminescence , photoluminescence , luminescence , materials science , phosphor , optoelectronics , light emission , intramolecular force , photochemistry , chemistry , stereochemistry
Abstract Persistent luminescence from purely organic materials is basically triggered by light and electricity, which largely confines its practical applications. A purely organic AIEgen exhibits not only persistent photoluminescence, but also transient and persistent room‐temperature mechanoluminescence. By simply turning on and off a UV lamp, tricolor emission switching between blue, white, and yellow was achieved. The data from single‐crystal structure analysis and theoretical calculation suggest that mechanism of the observed persistent mechanoluminescence (pML) is correlated with the strong spin–orbit coupling of the bromine atom, as well as the formation of H ‐aggregates and restriction of intramolecular motions in noncentrosymmetric crystal structure. These results outline a fundamental principle for the development of new pML materials, providing an important step forward in expanding the application scope of persistent luminescence.