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Organic polymorphic crystals with multi-stimuli response:excellent mechanical elasticity,novel two-stage heterotropic photochromism and self-reversible acidichromism

引用

Science China Materials 2024年第9期67卷 2796-2806页

作者： Yutong Yao Ting Wang Hui Yu Zhicheng Jiang Wenbo Wu Hongtu Zhao Hongchang Wu Na Wang Xin Huang Hongxun Hao National Engineering Research Center of Industrial Crystallization Technology School of Chemical Engineering and TechnologyTianjin UniversityTianjin300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin300072China State Key Laboratory of Chemical Engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin300072China

Smart multi-stimuli responsive organic materials have become increasingly favored due to their advantages of high stability and easy *** this study,a cyanostilbene derivative((αZ)-2-chloro-α-[(4-methoxyphenyl)methylene]-5-pyridinehyde,TAR)was successfully synthesized,and its polymorphs(TAR-1 and TAR-2)exhibited multiple responsive behaviors under different stimulus ***-1 is supposed to have excellent mechanical properties,while TAR-2 shows fascinating heterotropic photochromism(green-cyan-yellow)under different intensities of ultraviolet(UV)irradiation,which has never been reported in previous *** investigation revealed that this was attributed to different degrees of[2+2]cycloaddition induced by UV *** addition,both polymorphs could be protonated during Trifluoroacetic acid fuming and deprotonate automatically after fuming,accompanied by the significant variation in ***,two scenarios were designed based on their unique stimuli-responsive properties,which proved their promising potential in fields of information security and anti-counterfeiting encryption.

关键词： elastic bending heterotropic photochromism self-reversible acidichromism

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