1. Mechanical Force-Induced Blue-Shifted and Enhanced Emission for AIEgens
- Author
-
Chang-Sheng Guo, Xiao-Long Su, Yu-Ting Yin, Bo-Xuan Zhang, Xin-Yi Liu, Rui-Peng Wang, Pu Chen, Hai-Tao Feng, and Ben-Zhong Tang
- Subjects
aggregation-induced emission ,mechanochromic luminescence ,blue-shift ,cyanostilbene ,enhanced emission ,Biotechnology ,TP248.13-248.65 - Abstract
Mechanochromic (MC) luminescence of organic molecules has been emerging as a promising smart material for optical recording and memory devices. At the same time, pressure-induced blue-shifted and enhanced luminescence are rarely reported now. Herein, a series of cyanostilbene-based AIEgens with different substituents were synthesized to evaluate the influence of morphology transformation and push-pull electronic effect on the MC luminescence. Among these luminophores, compound 1 with one cyano group and diethylamino group was more susceptible to mechanical stimuli and obtained blue-shifted and enhanced fluorescence in response to anisotropic grinding. Powder X-ray diffraction patterns indicated that the MC behaviors were ascribed to the solid-state morphology transition from crystal-to-crystal. Analysis of crystal structures revealed that loose molecular packing is a key factor for high high-contrast MC luminescence. The smart molecular design, together with the excellent performance, verified that luminophores with twisted structures are ideal candidates for MC luminogens.
- Published
- 2022
- Full Text
- View/download PDF