title: An organic molecule with asymmetric structure exhibiting aggregation-induced emission, delayed fluorescence, and mechanoluminescence.
abstract: Compounds displaying delayed fluorescence (DF), from severe concentration quenching, have limited applications as nondoped organic light-emitting diodes and material sciences. As a nondoped fluorescent emitter, aggregation-induced emission (AIE) materials show high emission efficiency in their aggregated states. Reported herein is an AIE-active, DF compound in which the molecular interaction is modulated, thereby promoting triplet harvesting in the solid state with a high photoluminescence quantum yield of 93.3%, which is the highest quantum yield, to the best of our knowledge, for long-lifetime emitters. Simultaneously, the compound with asymmetric molecular structure exhibited strong mechanoluminescence (ML) without pretreatment in the solid state, thus exploiting a design and synthetic strategy to integrate the features of DF, AIE, and ML into one compound.
authors.affiliation: PCFM Lab and GD HPPC Lab, State Key Laboratory of Optoelectronic Material and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275 (China).
authors.forename: Shidang
authors.initials: S
authors.lastname: Xu
authors.forename: Tingting
authors.initials: T
authors.lastname: Liu
authors.forename: Yingxiao
authors.initials: Y
authors.lastname: Mu
authors.forename: Yi-Fan
authors.initials: YF
authors.lastname: Wang
authors.forename: Zhenguo
authors.initials: Z
authors.lastname: Chi
authors.forename: Chang-Cheng
authors.initials: CC
authors.lastname: Lo
authors.forename: Siwei
authors.initials: S
authors.lastname: Liu
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Alan
authors.initials: A
authors.lastname: Lien
authors.forename: Jiarui
authors.initials: J
authors.lastname: Xu
keywords: aggregation; fluorescence; luminescence; materials science; solid-state structures