基于电致酸/碱理论的手性光学切换体系

手性分子光学开关在光学储存、 光学通信以及三维立体显示等领域有着重要的应用价值. 但是目前的手性分子光学开关存在材料种类少、 光学可调性差、 稳定性差等缺点, 如何构筑出具有高光学可调性以及稳定性的手性光学切换体系依旧是一项严峻的挑战. 本工作基于电致酸/碱理论, 通过将手性联萘官能团引入到酸响应的罗丹明主体结构中, 设计并合成了一种新型的酸响应手性光学开关分子, 并将其与电致酸材料相结合, 成功实现了电场驱动的手性光学开关过程, 开发了一种新型的手性光学切换体系. 发现在合适的电场控制下, 其颜色、 荧光以及圆二色谱信号均能发生可逆的变化. 这种方法为构筑新型手性光学开关体系提供了一种新思路, 对手性光学开关材料的应用拓展具有重要的参考价值.

Chiroptical Molecular Switches Based on Reversible Electroacid/Electrobase

Chiroptical molecular switches have been intensively investigated in recent years due to their broad applications in the fields of optical storage， optical communication， three-dimensional imaging， etc. However， some drawbacks， such as few materials， poor optical tunability and poor stability of current chiroptical molecular switches， hinder their applications to construct a chiroptical switching device with high optical tunability and ideal stability. Thus， how to develop a chiroptical switching system with promising performances is still a serious challenge for the researchers. Herein， based on the reversible ‘electroacid/electrobase’ theory， we designed and synthesized a novel acid-responsive chiroptical molecular switch by introducing a chiral binaphthyl functional group into the acid-sensitive rhodamine structure. A novel chiroptical switching system has been successfully developed by the acid-responsive chiroptical molecular switches combining with electroacid materials， as its chiroptical property can be switched by the electric field reversibly. The results show that the color， fluorescence and circular dichroic（CD） signals of this new material could be reversibly regulated under the control of a suitable electric field. In conclusion， this method provides a brand new idea of constructing new chiroptical molecular switching systems， and it will be beneficial for expending the properties and applications of chiroptical molecular switching materials in the future.