基于胆甾型液晶的有机圆偏振室温磷光材料的研究进展  

Research progress of organic circularly polarized room temperature phosphorescent materials based on cholesteric liquid crystals

作　　者：王煜昌 王潇[1] 张京 张雨霞 马云[1] 赵强[1] Yuchang Wang;Xiao Wang;Jing Zhang;Yuxia Zhang;Yun Ma;Qiang Zhao(State Key Laboratory of Organic Electronics and Information Displays,Jiangsu Key Laboratory for Biosensors,Institute of Advanced Materials&Institute of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学有机电子与信息显示国家重点实验室,江苏省生物传感器重点实验室,信息材料与纳米技术研究院,柔性电子(未来技术)研究院,南京210023

出　　处：《中国科学：化学》2024年第8期1329-1336,共8页SCIENTIA SINICA Chimica

基　　金：国家重点研发计划(编号:2022YFA1204404);国家自然科学基金(编号:62305172);江苏省高校自然科学基金(编号:23KJB430026);南京邮电大学校级科研基金(编号:NY223052)资助项目。

摘　　要：圆偏振室温磷光(CP-RTP)材料因其独特的光物理性质,广泛应用于生物成像、信息加密和防伪等领域.近年来,研究者研发了不同体系的CP-RTP材料,发现超分子组装策略可以提供高阶有序的排列方式,有利于实现较高的磷光发光不对称因子g_(Ph).胆甾型液晶材料具有高阶有序的螺旋超结构,表现出手性放大效应,并利用这种周期性螺旋结构选择性地反射与其螺旋旋向相同的圆偏振光,从而透射出与其相反旋向的纯圆偏振光,进一步提高了发光不对称因子g_(Ph)值.本文分析了螺旋超结构对材料光物理性质的影响,总结了近年来胆甾型有机高偏振室温磷光材料的研究进展及其在信息加密和安全防伪等领域的应用.Circularly polarized room temperature phosphorescence(CP-RTP) materials are widely used in biological imaging, information encryption and anti-counterfeiting due to their unique photophysical properties. In recent years,researchers have discovered that highly ordered supramolecular assemblies contribute to improving the phosphorescent dissymmetry factor g_(Ph). Cholesteric liquid crystals(CLCs) with helical superstructures exhibit a chirality amplification effect. Moreover, these periodic helical-stacking superstructures possess selective reflection of CP light, enabling the generation of strong CPL with high g_(Ph) values. The CLCs selectively reflect CPL with the same helical handedness,while transmitting CPL with the opposite helical handedness as that of the CLCs. This review analyzes the effect of helical superstructures on photophysical properties, and provides a clear summary of recent cholesteric CP-RTP materials and their applications in information encryption and anti-counterfeiting.

关 键 词：圆偏振有机室温磷光 胆甾型液晶 磷光发光不对称因子 

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