由菲咯啉基分子与聚乙烯醇共组装的可见光活化磷光系统  

Visible Light-Activated Phosphorescence Systems Co-Assembled by Phenanthroline-Based Molecules with Polyvinyl Alcohol

作　　者：张太广 刘栋良[1] 吴宏伟 ZHANG Taiguang;LIU Dongliang;WU Hongwei(College of Chemistry and Chemical Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学化学与化工学院,上海201620

出　　处：《Journal of Donghua University(English Edition)》2024年第2期137-145,共9页东华大学学报（英文版）

基　　金：Shanghai Pujiang Program of China(No.20PJ1400500);International Cooperation Fund of Science and Technology Commission of Shanghai Municipality,China(No.21130750100);Fundamental Research Funds for the Central Universities,China(No.2232022A-03)。

摘　　要：开发可见光活化的纯有机室温磷光(room-temperature phosphorescence,RTP)材料已引起广泛关注。通过将基于菲咯啉的供体-受体(donor-acceptor,D-A)荧光粉掺入刚性聚合物基质聚乙烯醇(polyvinyl alcohol,PVA)中,开发了一种可见光激活的RTP设计策略。富含杂原子N的菲咯啉可促进三重态激子的产生,并与PVA形成丰富的氢键,抑制非辐射弛豫,从而引发磷光。在420 nm可见光照射下,通过调节分子共轭结构和D-A相互作用,掺杂荧光粉的PVA薄膜的磷光颜色可从绿色变为黄色。基于上述磷光特性,该薄膜可用于信息加密。该研究为在信息加密、传感器等领域制备具有良好应用前景的可见光活化磷光材料提供了一种简单可行的方法。Developing pure organic room-temperature phosphorescence(RTP)materials with visible light activation has drawn widespread attention.In this work,a visible light-activated RTP design strategy was developed by incorporating the phenanthroline-based donor-acceptor(D-A)phosphor into a rigid polymer matrix polyvinyl alcohol(PVA).Phenanthroline with rich heteroatom N can promote the generation of triplet excitons and form abundant hydrogen bonds with PVA,inhibiting the non-radiative relaxation and thereby leading to phosphorescence.Upon irradiation with 420 nm visible light,the phosphorescence color of these doped PVA films can be shifted from green to yellow by regulating the molecular conjugated structure and D-A interaction.Based on the phosphorescence properties,these doped PVA films can be used for information encryption.This work offers a simple and feasible approach for constructing visible light-activated phosphorescence materials with excellent application prospects in information encryption,sensors and other fields.

关 键 词：磷光 菲咯啉 可见光 聚合物体系 

分 类 号：O631[理学—高分子化学]