Reversible Photochromism for Dynamically Tuning Full-Color Circularly Polarized Luminescence Toward Multi-Level Anti-Counterfeiting Application,Advanced Optical Materials

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Reversible Photochromism for Dynamically Tuning Full-Color Circularly Polarized Luminescence Toward Multi-Level Anti-Counterfeiting Application
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2024-04-09 , DOI: 10.1002/adom.202400215
Lujie Song _{1,

2,

3} , Ying Dong _{2,

3} , Biao Zhao _{1,

3} , Youping Wu _{2,

3} , Jianping Deng _{1,

2,

3}

Affiliation

Photochromic circularly polarized luminescence (CPL) demonstrates broad application prospects in the field of advanced functional materials. However, the current photochromic CPL focuses predominantly on single-band CPL adjustment, and how to achieve dynamically tunable CPL in multi-band is still highly challenging. This work reports the success in utilizing reversible photochromism for realizing full-color CPL emission. Photochromic flexible films are created consisting of triple components: spiropyran (SP) working as photochromic matter, polyurethane (PU) as matrix, and chiral helical polyacetylene as chiral component. Further introducing blue fluorophore 9-anthracene carboxylic acid (ACA) in the film, blue CPL and red CPL are emitted respectively through selective absorption/transmission and circularly polarized fluorescence energy transfer (CPF-ET). Doping the photochromic film with diverse fluorophores provides full-color CPL emission. Adding Zn²⁺ further intensifies fluorescence and CPL via forming merocyanine (MC)-Zn²⁺ complex. Taking advantage of the diverse fluorescence and CPL emission, anti-counterfeiting, and secondary encryption application of the resulting photochromic CPL materials are demonstrated.

中文翻译：

可逆光致变色动态调节全色圆偏振发光以实现多级防伪应用

光致变色圆偏振发光（CPL）在先进功能材料领域展现出广阔的应用前景。然而，目前的光致变色CPL主要集中在单波段CPL调节，如何实现多波段动态可调CPL仍然具有很大的挑战性。这项工作报告了利用可逆光致变色实现全色 CPL 发射的成功。光致变色柔性薄膜由三重组分组成：螺吡喃（SP）作为光致变色物质，聚氨酯（PU）作为基质，手性螺旋聚乙炔作为手性组分。在薄膜中进一步引入蓝色荧光团9-蒽甲酸（ACA），通过选择性吸收/透射和圆偏振荧光能量转移（CPF-ET）分别发射蓝色CPL和红色CPL。在光致变色薄膜中掺杂不同的荧光团可提供全色 CPL 发射。添加 Zn ²⁺ 通过形成部花青 (MC)-Zn ²⁺ 复合物进一步增强荧光和 CPL。利用多样化的荧光和CPL发射特性，展示了所得光致变色CPL材料的防伪和二次加密应用。

更新日期：2024-04-09

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