Photoinduced Dual-Mode Luminescent Patterns in Dicyanostilbene-Based Liquid Crystal Polymer Films for Anticounterfeiting Application
Photoinduced Dual-Mode Luminescent Patterns in Dicyanostilbene-Based Liquid Crystal Polymer Films for Anticounterfeiting Application
复制标题
用于防伪应用的二氰芪基液晶聚合物薄膜中的光致双模发光图案
DOI：
10.1021/acsapm.8b00276
复制
发表时间：
2019-04-01
影响因子：
5
通讯作者：
Guo, Jinbao
中科院分区：
文献类型：
--
作者：
He, Yanrong;Li, Juntao;Guo, Jinbao
可调谐光致发光因其独特的特性在发光显示、生物成像和光电器件领域备受青睐。在此，通过将光致取向与光异构化反应相结合，首次提出了基于二氰基芪单体（DCN-M）的液晶聚合物（LCP）薄膜中的光致双模发光图案。首先通过使用磺酸偶氮染料（SD1）作为配向剂来控制LCP基质中高发射DCN-M的局部取向，从而实现微观和宏观尺度的高偏振发射图案。此外，利用DCN-M掺杂LCP薄膜中二氰基芪部分的Z/E光异构化，可以在非偏振紫外光照射下调节LCP薄膜的光致发光强度，从而使LCP薄膜中的亮区和暗区交替变化。最后，我们提出了针对防伪应用的单 LCP 薄膜中的双模式发射模式的概念验证演示。
Tunable photoluminescence is highly favored for its unique in light emitting displays, bioimaging, and optoelectronic device fields. Here, a photoinduced dual-mode luminescent pattern in the dicyanostilbene monomer (DCN-M)-based liquid crystal polymer (LCP) films is first proposed by combining a photoinduced alignment with a photoisomerization reaction. The high polarized emission patterns at microscopic and macroscopic scale are first achieved by employing sulfonic azo dye (SD1) as an alignment agent to control the local orientation of highly emissive DCN-M in LCP matrix. Furthermore, by taking advantage of Z/E photoisomerization of the dicyanostilbene moiety in the DCN-M-doping LCP film, the photoluminescence intensity of the LCP film could be tuned upon nonpolarized ultraviolet light irradiation, thus enabling alternating light and dark regions in the LCP film. Finally, we proposed a proof-of-concept demonstration of a dual-mode emission pattern in a single LCP film for an anticounterfeiting applicatio...