A ring-controlled fluorescent platform for visualizing polymer degradation  

作　　者：Tianhong Wu Wenhai Bian ChunhuiWang Jie Qiu Xiaolong Sun Xuhong Qian 

机构地区：[1]The Key Laboratory of Biomedical Information Engineering of Ministry of Education,School of Life Science and Technology,Xi’an Jiaotong University,Xi’an,People’s Republic of China [2]School of Nuclear Science and Technology,Xi’an Jiaotong University,Xi’an,People’s Republic of China [3]State Key Laboratory of Bioreactor Engineering,Shanghai Key Laboratory of Chemical Biology,School of Pharmacy,East China University of Science and Technology,Shanghai,People’s Republic of China [4]School of Chemistry and Molecular Engineering,East China Normal University,Shanghai,People’s Republic of China

出　　处：《Aggregate》2023年第3期126-134,共9页聚集体（英文）

摘　　要：The creation of a new photoluminescent platform to study their photo physics and further applications is important in the fields of chemistry,material,physics,etc.In this work,we developed benzene-based fluorophores generated by chemical reactions on conjugate acceptor precursors.Their optical properties have been studied,and the large Stokes shifts,high molar extinction coefficients and quantum yields have been revealed.The starting precursors containing bis-intercalated vinyl thioester shows no luminescence,which is turned on by the chemically triggered cyclization.From spectroscopic,crystallographic,and computational studies,cyclization-induced emission enhancement is proposed as a mean to explain the photoluminescent performances,a principle extended in the substituent incorporated fluorophores.Furthermore,they were applied to the chemically triggered degradation of a polymer and achieved visual tracking,quantifying,and downcycling of the processes.The method for designing and developing series fluorophores and visually tracking polymer degradation represents a new photoluminescent platform,allowing its further applications.

关 键 词：cyclization-induced emission downcycling PHOTOLUMINESCENCE polymer degradation substituent effect 

分 类 号：O657.3[理学—分析化学]