基于菲咔唑的超长有机室温磷光高分子薄膜  

Ultralong Organic Room Temperature Phosphorescence Polymer Films Based on 9H-Dibenzo[a,c]carbazole

作　　者：张兴达 付晓华 戴光阔 靳惠雯 张雪 白景娟 马佳欣 马志勇 Xing-da Zhang;Xiao-hua Fu;Guang-kuo Dai;Hui-wen Jin;Xue Zhang;Jing-juan Bai;Jia-xin Ma;Zhi-yong Ma(State Key Laboratory of Organic-Inorganic Composites,College of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029)

机构地区：[1]北京化工大学化学工程学院有机无机复合材料国家重点实验室,北京100029

出　　处：《高分子学报》2023年第10期1624-1631,共8页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号22175015,21704002)资助项目。

摘　　要：设计合成了一种新的有机磷光基元(菲咔唑),并掺杂进不同的高分子材料制备成薄膜.研究结果表明掺杂聚乙烯醇(PVA)薄膜有着磷光发射强度大、磷光寿命长(τ=2.12 s)、磷光量子产率高(Φ_(p)=7.95%)等优点.离子自由基通过形成电荷分离态参与了超长磷光的发射过程.相较于掺杂聚甲基丙烯酸甲酯(PMMA)薄膜,掺杂PVA薄膜呈现更明显的长余晖,这是由于PVA薄膜提供了更加刚性的环境,磷光基元与PVA分子间相互作用力极大增强,从而促进了电荷分离态的形成,减少了分子运动引起的非辐射耗散及薄膜中氧气对三线态激子的淬灭.此外,掺杂PVA薄膜具有水刺激响应性质,在水的刺激下可以发生磷光性能的改变,因此可应用于信息加密、湿度检测等场景.Benzocarbazole and its derivatives have excellent ultralong organic room temperature phosphorescence(RTP)properties.Polymer films can help benzocarbazole molecules achieve better phosphorescence performance.In this paper,a new organic phosphorescence unit named 9H-dibenzo[a,c]carbazole(CzNPh)is designed and synthesized,and thin films are prepared by using different polymer materials.Compared with the doped poly(methyl methacrylate)(PMMA)films,the doped poly(vinyl alcohol)(PVA)films of CzNPh have higher phosphorescence intensity,longer phosphorescence lifetime(τ=2.12 s),higher phosphorescence quantum yield(Φ_(p)=7.95%).Radical ions participate in formation of charge separation states and are involved in the emitting process of ultralong phosphorescence.Rigid environment in PVA films and enhanced interactions between CzNPh and PVA facilitate formation of charge separation states and reduce non-radiative transition caused by molecular motion and the quenching of triplet excitons by oxygen.In addition,CzNPh@PVA films can also realize the stimulation response to water because water can damage the interactions between CzNPh and PVA,so CzNPh@PVA films can be applied in information encryption,humidity detection,etc.

关 键 词：菲咔唑 超长室温磷光 聚乙烯醇薄膜 自由基 水响应 

分 类 号：TB383.2[一般工业技术—材料科学与工程]