Unconventional Fluorescent and Multi-responsive Polysiloxane:Synthesis,Characterization and Biological Applications  

作　　者：Xiao-Di Li Shu-Sheng Li Xu-Bao Jiang Xiao-Li Zhu Xiang Zheng Kong 

机构地区：[1]College of Chemistry and Chemical Engineering,University of Jinan,Jinan,250022,China [2]College of Chemical Engineering,Tianjin University,Tianjin,300072,China [3]Foshan(Southern China)Institute for New Materials,Foshan,528200,China

出　　处：《Chinese Journal of Polymer Science》2024年第5期579-590,I0006,共13页高分子科学（英文版）

基　　金：This work was financially supported by Nature Science Foundation of Shandong Province,China(Nos.ZR2021MB112 and ZR2022MB051);Science and Technology Bureau of Jinan City(No.2021GXRC105);Postdoctoral Science Foundation of China(No.2022M712343);as well as by Basic and Applied Basic Research Foundation(No.2020A1515110374)of Guangdong Province,China.

摘　　要：Owing to their high significance in fundamental study and diverse applications,stimuli-responsive and fluorescent polymers,particularly those with cluster-triggered emission(CTE)featured by non-conjugated chromophores,have drawn tremendous attention in recent years.In this work,fluorescent and multi-responsive polysiloxane(FRPS)was synthesized by hydrolytic condensation polymerization of 3-aminopropyl methyl diethoxysilane(APMS)with 3-(N-isopropyl propionamide)iminopropyl methyl diethoxysilane(APMS-NIP),which was formed in situ through aza-Michael addition between APMS and N-isopropyl acrylamide.FRPS was not only highly sensitive to temperature,pH and CO_(2) in water,but also showed an enhanced and stimuli-adjustable fluorescence emission.The effects of monomer feeding,pH and CO_(2) on its lower critical solution temperature and fluorescent property were investigated.FRPS fluorescence emission was ascribed to CTE mechanism.In addition,FRPS was shown to be highly potential as physiological indicator for cell imaging,and for controlled release and trace detection of doxorubicin.This study provides therefore a type of stimuli-responsive and fluorescent material for potential applications in biomedical fields,and it is also of great significance for understanding of the fluorescence mechanism of polysiloxane-based stimuli-responsive polymers.

关 键 词：POLYSILOXANE Multi-responsiveness Cluster-triggered emission Cell imaging Controlled drug release 

分 类 号：O657.3[理学—分析化学] TQ317[理学—化学]