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Issue 12, 2011
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Molecularly imprinted core-shell nanoparticles for determination of trace atrazine by reversible addition–fragmentation chain transfer surface imprinting

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Abstract

A simple and effective method was proposed to prepare uniform surface-imprinted nanoparticles. This strategy was carried out by introducing vinyl groups to the surface of silica beads by a one-step modification, followed by copolymerization of functional monomers via reversible addition–fragmentation chain transfer (RAFT) precipitation polymerization. Owing to the intrinsic advantages of controlled/living polymerization and surface imprinting technology, the resultant RAFT surface-imprinted nano-sized polymers (RAFT-SINPs) demonstrated spherical shaped particles with excellent monodispersity, and improvements in imprinting efficiency and mass transfer in comparison to molecularly imprinted polymers (MIPs) prepared by traditional precipitation polymerization. Recoveries of 93.4% and 79.8% were achieved by one-step extraction when RAFT-SINPs were used for the preconcentration and selective separation of atrazine in spiked corn and lettuce samples, respectively. These results provided the possibility for the separation and enrichment of atrazine from complicated matrices by RAFT-SINPs.

Graphical abstract: Molecularly imprinted core-shell nanoparticles for determination of trace atrazine by reversible addition–fragmentation chain transfer surface imprinting

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Publication details

The article was received on 22 Oct 2010, accepted on 10 Jan 2011 and first published on 10 Feb 2011


Article type: Paper
DOI: 10.1039/C0JM03593A
Citation: J. Mater. Chem., 2011,21, 4346-4351
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    Molecularly imprinted core-shell nanoparticles for determination of trace atrazine by reversible addition–fragmentation chain transfer surface imprinting

    S. Xu, J. Li and L. Chen, J. Mater. Chem., 2011, 21, 4346
    DOI: 10.1039/C0JM03593A

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