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Published on: December 27, 2018
Aggregation-induced emission and aggregation-promoted photochromism of bis(diphenylmethylene)dihydroacenes
Zikai He1,2, Liang Shan3, Ju Mei1,2
1HKUST Shenzhen Research Institute , No. 9 Yuexing 1st RD, South Area, Hi-tech Park Nanshan , Shenzhen 518057 , China .
Abstract:
Reported herein is a new class of pure polycyclic hydrocarbon molecules, designed through a novel aggregation-induced emission (AIE) strategy, with unexpected photochromic properties. The restriction of intramolecular motion was found as a comprehensive mechanism for the AIE effect. The photochromism mechanism study revealed that the photocyclization reaction of cis-stilbene, the molecular conformation in the single crystal and the tetracene backbone should contribute to the unique photo behavior. In particular, the fast responsive, photo-reversible and thermo-irreversible photochromic effect facilitated in the solid state opens a new field of aggregation-promoted photochromism.
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