Premium
Elucidating the Excited State of Mechanoluminescence in Organic Luminogens with Room‐Temperature Phosphorescence
Author(s) -
Yang Jie,
Gao Xuming,
Xie Zongliang,
Gong Yanbin,
Fang Manman,
Peng Qian,
Chi Zhenguo,
Li Zhen
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201708119
Subject(s) - phosphorescence , intersystem crossing , photoluminescence , excited state , intermolecular force , mechanoluminescence , photochemistry , chemistry , phosphorescent organic light emitting diode , fluorescence , triplet state , luminescence , singlet state , materials science , molecule , optoelectronics , atomic physics , organic chemistry , physics , quantum mechanics
Two stable, purely organic luminogens exhibit both mechano‐ (ML) and photoluminescence (PL) with dual fluorescence–phosphorescence emissions at room temperature. Careful analysis of the crystal structures, coupled with theoretical calculations, demonstrate that room‐temperature phosphorescence and ML properties are strongly related to molecular packing. In particular, the formation and fracture of molecular dimers with intermolecular charge‐transfer properties has a significant effect on intersystem crossing, as well as excited triplet state emissions, in both PL and ML processes.