文献类型：期刊文献

英文题名：A well-defined alternating copolymer based on a salicylaldimine Schiff base for highly sensitive zinc(II) detection and pH sensing in aqueous solution

作者：Wang, Shangfeng[1];Wu, Bin[1];Liu, Feng[1];Gao, Yun[1];Zhang, Weian[1]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Coll Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：6

期号：7

起止页码：1127

外文期刊名：POLYMER CHEMISTRY

收录：;EI(收录号：20150700519683);WOS:【SCI-EXPANDED(收录号:WOS:000349445700011)】；

基金：This work was financially supported by the National Natural Science Foundation of China (no. 21074035 and 51173044), the Research Innovation Program of SMEC (no. 14ZZ065), the Shanghai Pujiang Program under 14PJ1402600 and the Project-sponsored by SRF for ROCS, SEM. W. Z. also acknowledges the support from the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Fluorescence - Styrene - Zinc compounds - Solutions

摘要：We herein report a new strategy to fabricate novel well-defined alternating copolymers of poly(VBCDEG-alt-SaAEMI)s which were synthesized via alternating RAFT copolymerization of para-methoxydiethylene glycol-substituted styrenes (VBCDEG) and N-(2-salicylaldehyde-aminoethyl) maleimides (SaAEMI). H-1 NMR, C-13 NMR, FTIR and GPC results indicate that poly(VBCDEG-alt-SaAEMI) copolymers have well-defined alternating structures and narrow polydispersity (M-w/M-n < 1.35). It is interesting that poly( VBCDEG-alt-SaAEMI) alternating copolymers exhibit an excellent selective fluorescence "OFF-ON" response to Zn2+ by inhibiting the photoinduced electron transfer (PET) effect through copolymerization, while the monomer SaAEMI almost has no fluorescence response to Zn2+ due to the PET process. The sensors based on poly(VBCDEG-alt-SaAEMI) alternating copolymers have very fast response (30 s) to Zn2+, 62-fold fluorescence enhancement in aqueous solution and a detection limit of about 0.25 mu M. Additionally, the poly(VBCDEG-alt-SaAEMI) alternating copolymers also show a remarkable green fluorescence "OFF-ON" switch (230 similar to fold) when the pH turns from 11 to 12, thus these copolymers have potential application in dual-color detection.