链式转移
分子印迹聚合物
木筏
化学
可逆加成-断裂链转移聚合
聚合物
沉淀聚合
聚合
点击化学
化学工程
聚乙二醇
检出限
高分子化学
自由基聚合
有机化学
色谱法
选择性
工程类
催化作用
作者
Lijuan Zhao,Faqiong Zhao,Baizhao Zeng
标识
DOI:10.1016/j.bios.2014.06.022
摘要
A novel water-compatible fenitrothion imprinted polymer was prepared on Au nanoparticles (AuNPs) by click chemistry and reversible addition–fragmentation chain transfer (RAFT) precipitation polymerization (RAFTPP). The RAFT chain-transfer agent was synthesized on the surface of AuNPs using click chemistry, then an imprinted polymer with hydrophilic polymer brushes was prepared on the RAFT chain-transfer agent modified AuNPs by RAFTPP, mediated by hydrophilic polyethylene glycol macromolecular cochain-transfer agent. The obtained molecularly imprinted material showed improved accessibility to fenitrothion and recognition property in water medium. When the material was immobilized on an ionic liquid functionalized graphene coated glassy carbon electrode for the electrochemical determination of fenitrothion, the resulting electrochemical sensor presented linear response in the range of 0.01−5 μM, with a sensitivity of 6.1 μA/μM mm2. The low limit of detection was 8 nM (S/N=3). The sensor was successfully applied to the determination of real samples and the recovery for standard added was 95−108%.
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