Dyes and Pigments (2021)
Update date:2022-08-17
Topics:
Wu, Jiang
Yin, Jun
Chen, Sheng
Xiao, Hongyan
Yan, Bin
Yang, Qin
Three novel bis(tetraphenylethene) (BTPE) derivatives 1–3 were efficiently synthesized. All the materials exhibited aggregation-induced emission characteristics, and the dynamic light scattering measurments proved that the average diameter of the oxidised analogues 2 and 3 was less than that of the thioether precursor 1 due to the oxidation of the linking S-atom. Linking two tetraphenylethylenes via a sulfur atom with different oxidation states offered compounds which showed reversible mechanofluorochromic behavior. The crystal-to-amorphous phase conversion process was responsible for the mechanofluorochromism. Most notably, sulfone-based BTPE 3 presented polymorphism due to different packing modes, and the three observable morphologies could be interconverted.
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