Fluorescence "turn-on" metal ion sensors based on switching of intramolecular charge transfer of donor-acceptor systems

被引：32
作者：
Wang, Hongyu [2 ]
Lin, Jianming [3 ]
Huang, Wei [1 ]
Wei, Wei [1 ]
机构：
[1] Nanjing Univ Posts & Telecommun, Inst Adv Mat, Nanjing 210003, Peoples R China
[2] Shanghai Univ, Dept Chem, Shanghai 200444, Peoples R China
[3] Shanghai Int Airport Entry Exit Inspect & Quarant, Nanjing 201207, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2010年 / 150卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Turn on effect; Metal ion sensor; Intramolecular charge transfer; Donor-acceptor; CARBOXYLATE-SUBSTITUTED PPE; NONSPECIFIC INTERACTIONS; CONJUGATED POLYMERS; 2-PHOTON ABSORPTION; CHEMOSENSORS; PROPERTY; PROTEINS; MERCURY; DESIGN; WATER;
D O I：
10.1016/j.snb.2010.07.025
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
We report the synthesis and characterization of two copolymer P1 and P2 that use the poly[p-(phenyleneethynylene)-alt-(fluorenylethynylene)I as backbones and dibutylamino pendants as receptors In P2 strong electron-deficient 2 1 3-benzothiadiazole (BTDZ) was introduced into the backbone to enhance the dipole of the donor-acceptor system These two copolymers exhibited strong solvatochromic effect and very weak fluorescence due to the intramolecular charge transfer The frontier molecular orbitals of P2 were spatially separated le the HOMO was localized on the dibutylamino unit while the LUMO was localized on BTDZ unit Upon binding with metal ions PI and P2 showed changes of intensity and shift of the fluorescence emission peaks Cu2+ ion gave rise to most noticeable changes upon coordination with PI and P2 with which a new blue emission peak at 430 nm was detected along with enhanced emission (c) 2010 Elsevier B V All rights reserved
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页码：798 / 805
页数：8
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