TCNE-decorated triphenylamine-based conjugated polymer: Click synthesis and efficient turn-on fluorescent probing for Hg2+
作者:Wei Shi、Fudong Ma、Yonghai Hui、Hongyu Mi、Yong Tian、Yanli Lei、Zhengfeng Xie
DOI:10.1016/j.dyepig.2013.12.016
日期:2014.5
A type of triphenylamine-based conjugated polymer with cyano-containing chromophore in side chain, poly[(9,9-diocty1)-2,7-fluorene-co-N-4-(1,1,4,4-tetracyanobuta-1,3-dienyl)-4,4 '-triphenylaminel (P3) was successfully synthesized by catalyst-free and efficient click reaction between poly[(9,9-dioctyl)-2,7fluorene-co-N-4-ethynyl-4,4 '-triphenylamine] (P2) and tetracyanoethylene (TCNE). Chemical structures of intermediates and target polymer were verified by FT-IR and H-1 NMR analyses. Fluorescence of P3's THF solution was specifically quenched by the introduction of I-, accompanied by the change of its apparent color from pale brown to light yellow. With the introduction of Hg2+, fluorescence of P3/I(-)complex recovered quickly and even exceeded the initial intensity of pristine P3 (when the concentration of Hg2+ above similar to 6.65 x 10(-5) M). Other common cations brought very slight interference for P3/I(-)complex's response of Hg2+, and the detection limit of Hg2+ reached similar to 6.9 nM for such probing system. (C) 2013 Elsevier Ltd. All rights reserved.