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Reference type: Journal
Authors: Liu YX, Cao B, Jia P, An JH, Luo C, Ma LJ, Chang J, Pan K
Article Title: Layer-by-Layer Surface Molecular Imprinting on Polyacrylonitrile Nanofiber Mats.
Publication date: 2015
Journal: The Journal of Physical Chemistry A
Volume: 119
Issue: (25)
Page numbers: 6661-6667.
DOI: 10.1021/acs.jpca.5b02325

Abstract: Surface molecular imprinting in layer-by-layer (SMI-LbL) film is known as a facile and effective strategy to build imprinting sites that are more accessible to template molecules compared with molecular imprinting in polymers. Herein, we accomplished the formation of SMI-LbL film on electrospun nanofibers for the first time. The SMI-LbL nanofibers were prepared by a template-induced LbL process on the polyacrylonitrile (PAN) nanofiber substrates, followed by postinfiltrating and photo-cross-linking of photosensitive agent 4,4'-diazostilbene-2,2'-disulfonic acid disodium salt (DAS). The obtained nanofiber mat maintained the nanofibrous structure and showed rapid absorption and extraction of template molecules of meso-tetra(4-carboxyphenyl)-porphine (Por). The binding capacity of Por reached 2.1 mg/g when 3.5 bilayers were deposited on the nanofibers. After six cycles of extraction and reabsorption, the binding capacity of Por remained at 83%. Moreover, the absorption results of the targeted templated molecule of Por and the control molecule of Fast Green, which had a very similar chemical structure and charge status to Por, indicated the specific absorption for template molecule of Por. Thus, a surface molecular imprinted nanofiber mat with high selectivity of the templated molecule has been demonstrated
Template and target information: meso-tetra(4-carboxyphenyl)-porphine, Por


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