光致变色
材料科学
利乐
荧光
无定形固体
分子开关
质子化
单晶
Crystal(编程语言)
烷基
纳米技术
分子
光化学
光学
结晶学
有机化学
化学
计算机科学
物理
离子
药物化学
程序设计语言
作者
Xue Zhang,Zhimin Ma,Xianjiang Li,Chen Qian,Yan Liu,Shitao Wang,Xinru Jia,Zhiyong Ma
标识
DOI:10.1021/acsami.1c12187
摘要
In this article, we report a simple tetra-arylethene-based fluorescent switch TPS═C4 modified with a flexible alkyl chain by the Schiff base structure. The incorporation of C═N retains the excellent photochromic property of tetra-arylethene and endows TPS═C4 with new multiresponsiveness of mechanochromism and acidichromism and multicolor changes. TPS═C4 shows remarkable mechanochromism from a deep blue emission at 420 nm to bright blue with a new shoulder band at 450 nm, which arises from the force-induced phase transition from the crystal state to an amorphous form. Both the original crystalline powder and the ground amorphous sample exhibit interesting acidichromism, and their emission colors turn yellow (530 nm), due to the protonation of C═N. More interestingly, TPS═C4 displays fascinating photochromism in multiple states, especially in the single-crystal state. The flexible alkyl chain offers enough free space for molecular motion and facilitates single-crystal photochromism. Due to the multiresponsiveness and multicolor switch, TPS═C4 can be satisfactorily used for the multidimensional anticounterfeiting application. To the best of our knowledge, TPS═C4 is a rare multifunctional molecule with a simple structure but featuring multiresponsiveness and multicolor switch.
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