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Reversible Switching of the Emission of Diphenyldibenzofulvenes by Thermal and Mechanical Stimuli
Author(s) -
Luo Xiaoliang,
Li Jienian,
Li Cuihong,
Heng Liping,
Dong Yong Qiang,
Liu Zhengping,
Bo Zhishan,
Tang Ben Zhong
Publication year - 2011
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201101059
Subject(s) - materials science , thermochromism , crystallization , fluorescence , thermal , molecule , grinding , photochemistry , aggregation induced emission , chemical engineering , optoelectronics , composite material , optics , organic chemistry , thermodynamics , engineering , chemistry , physics
The thermochromic and mechanochromic fluorescence of diphenyldibenzofulvenes is investigated. Emission is boosted and blue‐shifted upon crystallization. Yellow emissive crystals of the material transform to green fluorescent crystals upon heating before melting. Reversible switching of the emission color and efficiency are achieved by repeated amorphization and crystallization of dye molecules by a pure thermal process or grinding–heating cycles.