多刺激响应多晶型有机晶体:出色的机械弹性、全新的二段折返光致变色和自可逆酸致变色
Organic polymorphic crystals with multi-stimuli response:excellent mechanical elasticity,novel two-stage heterotropic photochromism and self-reversible acidichromism
姚昱同 1王霆 2余辉 1姜志成 1武文波 1赵宏图 1武红常 1王娜 2黄欣 2郝红勋3
作者信息
- 1. National Engineering Research Center of Industrial Crystallization Technology,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China
- 2. National Engineering Research Center of Industrial Crystallization Technology,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),Tianjin 300072,China
- 3. National Engineering Research Center of Industrial Crystallization Technology,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),Tianjin 300072,China;State Key Laboratory of Chemical Engineering,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China
- 折叠
摘要
智能多刺激响应有机材料因其稳定性高、易于调控等优点而越来越受到人们的青睐.本研究成功合成了一种氰基苯乙烯衍生物((αZ)-2-氯-α-[(4-甲氧基苯基)亚甲基]-5-吡啶,TAR),其多晶型(TAR-1和TAR-2)在不同刺激条件下表现出多种响应行为.TAR-1具有优异的力学性能,而TAR-2在不同强度的紫外线照射下表现出迷人的二段折返光致变色(绿-青-黄),这在以往的研究中从未报道过.进一步的研究表明,这是由于紫外光诱导的不同程度的[2+2]环加成所致.此外,这两种多晶型都能在三氟乙酸发烟过程中发生质子化,发烟后能自动去质子化,并伴有显著的荧光变化.最后,基于其独特的刺激响应特性设计了两种场景,证明了其在信息安全和防伪加密领域的巨大潜力.
Abstract
Smart multi-stimuli responsive organic mate-rials have become increasingly favored due to their advantages of high stability and easy regulation.In this study,a cyanos-tilbene derivative((αZ)-2-chloro-α-[(4-methoxyphenyl)me-thylene]-5-pyridinehyde,TAR)was successfully synthesized,and its polymorphs(TAR-1 and TAR-2)exhibited multiple responsive behaviors under different stimulus conditions.TAR-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 studies.Further investigation revealed that this was attributed to different degrees of[2+2]cycloaddition induced by UV light.In addition,both polymorphs could be protonated during Trifluoroacetic acid fuming and deprotonate auto-matically after fuming,accompanied by the significant varia-tion in fluorescence.Finally,two scenarios were designed based on their unique stimuli-responsive properties,which proved their promising potential in fields of information se-curity and anti-counterfeiting encryption.
关键词
elastic bending/heterotropic photochromism/self-reversible acidichromismKey words
elastic bending/heterotropic photochromism/self-reversible acidichromism引用本文复制引用
基金项目
National Natural Science Foundation of China(22208237)
China Postdoctoral Science Foundation(2021M692382)
出版年
2024
NETL
NSTL
万方数据