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Reference type: Journal
Authors: Khasawneh MA, Vallano PT, Remcho VT
Article Title: Affinity screening by packed capillary high performance liquid chromatography using molecular imprinted sorbents II. Covalent imprinted polymers.
Publication date: 2001
Journal: Journal of Chromatography A
Volume: 922
Issue: (1-2)
Page numbers: 87-97.
DOI: 10.1016/S0021-9673(01)00932-3

Abstract: This study concentrates on the production of covalent molecular imprint polymers (MIPs) as highly selective sorbents for nortriptyline (NOR), a representative tricyclic antidepressant (TCA). The functionalized template contains a polymerizable 4- vinylphenyl carbamate moiety used to bind the template molecule to the polymer matrix. Polymerization with a cross-linker followed by hydrolytic cleavage of the labile carbamate functionality leaves an MIP with selective binding sites capable of binding template through hydrogen bonding interactions. Demonstrated chromatographically through a "selection index", these MIPs showed high selectivity for the template molecule (NOR) among a library of structurally similar compounds. The recognition was found to correlate with structural similarity to the template compound. A direct comparison between covalent and non-covalent molecular imprinting strategies reveals a great deal of improvement in the peak shape of the retained compound resulting from covalent imprinting (evidenced by peak asymmetry factors A(s)). (C) 2001 Elsevier Science B.V. All rights reserved

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