基于光调控胆甾相液晶的圆偏振发光材料的研究进展  

Recent advances in circularly polarized luminescent materials based on light regulation of cholesteric liquid crystals

作　　者：康文欣 任天淇 孟宪宇 李山 郭金宝[1,2] Wenxin Kang;Tianqi Ren;Xianyu Meng;Shan Li;Jinbao Guo(College of Materials Science and Engineering,Beijing University of Chemical Technology,Bejing 100029,China;Key Laboratory of Carbon Fiberand Functional Polymers,Ministry of Education,Bejing University of Chemical Technoogy Bejing 00029,China)

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]北京化工大学,碳纤维及功能高分子教育部重点实验室,北京100029

出　　处：《中国科学：化学》2024年第8期1321-1328,共8页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(编号:51773009,52073017)资助项目。

摘　　要：圆偏振发光(CPL)在手性荧光探针、圆偏振有机发光二极管和光学防伪等领域具有潜在应用.为了扩大CPL材料的应用范围,研究人员开始关注刺激响应型CPL活性材料.胆甾相液晶(CLC)因其高度有序的手性环境以及优异的可调性已成为刺激响应CPL活性材料的理想选择.目前,基于CLC的光响应CPL材料已得到广泛开发,这些材料通常能在多组分系统中实现CPL信号响应.本综述重点关注CLC中光调控CPL的研究进展,总结了CPL调控的三种策略:(1)利用光驱动过程光开关分子的手性或螺旋变化调控CLC的CPL信号;(2)利用手性光开关与手性掺杂剂间手性竞争关系调控CLC的CPL信号;(3)利用光驱动非手性二向色性染料有序参数值变化调控CPL信号.本综述有望为基于光响应CLC的CPL调控提供重要的参考和指导,以推动其在更广泛领域的应用.Circularly polarized luminescence(CPL) has potential applications in the fields of chiral fluorescent probes,CP organic light-emitting diodes, and optical anti-counterfeiting. To expand the application range of CPL materials,researchers have begun to focus on stimulation-responsive CPL active materials. Cholesteric liquid crystal(CLC) has become an ideal choice for construction stimulus-responsive CPL active materials due to its highly ordered chiral environment and excellent tunability. Currently, CLC-based photo-responsive CPL materials have been widely developed, and these materials can achieve CPL signal response in multi-component systems. This review focuses on the research progress of photo-regulation of CPL in CLC, and summarizes three strategies for CPL regulation:(1) The CPL signal of CLC is regulated by the chirality or helix changes of photo-switches molecules during light modulation;(2) The CPL signal of CLC is regulated by the chiral competition between chiral photo-switches and chiral dopants;(3)The CPL signal is regulated by the changes of order parameter value of non-chiral dichroic dyes driven by light modulation. This review is expected to explore CPL regulation techniques based on photo-responsive CLC further to promote its application in a wider field.

关 键 词：圆偏振发光 光调控 胆甾相液晶 手性反转 

分 类 号：O753.2[理学—晶体学] TB34[一般工业技术—材料科学与工程]