Intrinsic emission and tunable phosphorescence of perfluorosulfonate ionomers with evolved ionic clusters  

作　　者：Qing Zhou Jia Cui Tianjia Yang Changlu Hu Zihao Zhong Zhenhua Sun Yongyang Gong Supeng Pei Yongming Zhang 

机构地区：[1]School of Chemistry and Chemical Engineering,Shanghai Key Lab of Electrical Insulation and Thermal Aging,Shanghai Electrochemical Energy Devices Research Center,Center of Hydrogen Science,Shanghai Jiao Tong University,Shanghai 200240,China [2]School of Chemical and Environmental Engineering,Shanghai Institute of Technology,Shanghai 201418,China [3]Petrochina Petrochemical Research Institute,Beijing 102299,China [4]College of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,China

出　　处：《Science China Chemistry》2020年第6期833-840,共8页中国科学（化学英文版）

基　　金：supported by the Petrochina Petrochemical Research Institute(LH-17-02-07-05);Open Foundation from State Key Laboratory of Fluorinated Functional Membrane Material。

摘　　要：Intrinsic emission from unorthodox luminogens without traditional conjugated building blocks is drawing increasing attention.However,the emission mechanism is still controversial.Herein,we demonstrate the intriguing emission from perfluorosulfonate ionomers(PFSIs),which can be explained by the clustering triggered emission(CTE)mechanism.Despite being free of any conventional chromophores,PFSIs exhibit bright emission and multi-color phosphorescence(77 K)in concentrated solutions,powders and membranes with obvious aggregation-induced emission(AIE)characteristics.Clustered sulfonic acids are responsible for the light emission,and their connection and evolution are deeply explored via X-ray diffraction(XRD)and small angel X-ray scattering(SAXS),in which the electron overlap determined by the clustered status results in the extended conjugation and simultaneously rigidified conformations.These results demonstrate that it is feasible to use fluorescence analysis to explore the ionic cluster structure and evolution of PFSI,and it can be applied in the pure organic luminescent field as well.

关 键 词：nonconventional luminogens clustering-triggered emission tunable phosphorescence perfluorosulfonate ionomers ion clusters 

分 类 号：TQ311[化学工程—高聚物工业]