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Aggregation‐Induced Emission with Long‐Lived Room‐Temperature Phosphorescence from Methylene‐Linked Organic Donor–Acceptor Structures
Author(s) -
Chen Biao,
Zhang Xuepeng,
Wang Yucai,
Miao Hui,
Zhang Guoqing
Publication year - 2019
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201801002
Subject(s) - phosphorescence , acceptor , photochemistry , methylene , methylene blue , chemistry , materials science , fluorescence , catalysis , organic chemistry , optics , physics , photocatalysis , condensed matter physics
Aggregation‐caused quenching (ACQ), where excited‐state and/or ground‐state electronic structures are altered to exhibit an increased proclivity for non‐radiative decay for the aggregates, is largely responsible for the lack of fluorescence and phosphorescence in molecular solids in general. Here we show that ACQ could be effectively circumvented by constructing an aromatic system with a methylene‐linker, where the system exhibits typical aggregation‐induced emission (AIE) with long‐lived room‐temperature phosphorescence, since the tetrahedral structure in the solid state may significantly reduce strong intermolecular interactions contributing to ACQ.