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Polymerization‐Enhanced Intersystem Crossing: New Strategy to Achieve Long‐Lived Excitons
Author(s) -
Sun Xingxing,
Wang Xijun,
Li Xinyang,
Ge Jing,
Zhang Qun,
Jiang Jun,
Zhang Guoqing
Publication year - 2015
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201400529
Subject(s) - intersystem crossing , singlet state , exciton , singlet fission , photochemistry , materials science , excited state , density functional theory , polymerization , chemical physics , photonics , chemistry , optoelectronics , physics , polymer , atomic physics , computational chemistry , condensed matter physics , composite material
For a singlet–triplet coupled molecular system, the efficiency of forward and reverse intersystem crossing processes can be enhanced by reducing the energy gap between the singlet and triplet excited states (Δ E ST ), thus prolonging the exciton lifetimes. This has been proven beneficial for many emerging applications such as molecular luminescence, optoelectronics, and photonics. Here, a strategy is proposed to create small Δ E ST by polymerizing fluorescent dye molecules, the efficacy of which is justified by density functional theory calculations and ultrafast spectroscopy. Thus, singlet–triplet exciton communication through polymerization‐enhanced intersystem crossing is also proposed.