文献类型：期刊文献

英文题名：Fluorescent thermometer based on a quinolinemalononitrile copolymer with aggregation-induced emission characteristics

作者：Yang, Jinfeng[1,2,3];Gu, Kaizhi[1,2];Shi, Chuanxing[1,2];Li, Meng[4];Zhao, Ping[1,2];Zhu, Wei-Hong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Shanghai Key Lab Funct Mat Chem,Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Joint Int Res Lab Precis Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Inst Fine Chem,Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, North 4th Rd, Shihezi 832003, Xinjiang, Peoples R China;[4]North China Elect Power Univ, Dept Environm Sci & Engn, Baoding 071003, Peoples R China

年份：2019

卷号：3

期号：8

起止页码：1503

外文期刊名：MATERIALS CHEMISTRY FRONTIERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000477682400024)】；

基金：This work was supported by the NSFC Science Center Program (21788102) and Creative Research Groups (21421004), the National Key Research and Development Program (2016YFA0200300 and 2017YFC0906902), NSFC/China (21636002, 21622602, and 21607044), the Shanghai Municipal Science and Technology Major Project (2018SHZDZX03), the National Postdoctoral Program for Innovative Talents (BX201700075), the Program of Introducing Talents of Discipline to Universities (B16017), and the Natural Science Foundation of Hebei Province (B2017502069).

语种：英文

摘要：Fluorescent molecular thermometers are of great importance because of their potential biomedical applications. However, conventional fluorescent thermometers always face the serious problem of thermal-induced fluorescence quenching. Given that the fluorescence behavior of aggregation-induced emission luminogen (AIEgen)-containing polymers still needs improvement, here we report an AIEgen-grafted copolymer P(NIPAM-co-EM) with a thermo-responsive polymer poly(N-isopropyl acrylamide) (PNIPAM) as a matrix for constructing an AIE fluorescent thermometer. Considering the thermal and fluorescence behaviors, the aqueous copolymer exhibits a specific lower critical solution temperature (LCST) at about 30 degrees C, along with a fluorescence enhancement of 3.1-fold during the phase transition from 30 to 45 degrees C. Significantly, the temperature-dependent photophysical characteristic reveals that the fluorescence signal of P(NIPAM-co-EM) can be switched reversibly, thereby achieving the nondestructive sensing of temperature. The resulting copolymer P(NIPAM-co-EM) shows an interesting aggregation-induced enhanced emission (AIEE) activity, which is attributed to the grafted AIE-active unit of quinolinemalononitrile tangled with polymer chains. As demonstrated, the AIEgen-grafted copolymer can be potentially developed as a fluorescent thermometer through its AIEE mechanism.