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Reference type: Journal
Authors: Sibrian-Vazquez M, Spivak DA
Article Title: Improving the strategy and performance of molecularly imprinted polymers using cross-linking functional monomers.
Publication date: 2003
Journal: Journal of Organic Chemistry
Volume: 68
Issue: (25)
Page numbers: 9604-9611.
DOI: 10.1021/jo0352225

Abstract: A new strategy for monomer design has been investigated that combines interactive monomer functionality with a cross-linking format, giving as a result noncovalent molecularly imprinted polymers (MIPS) with improved performance. This strategy was explored under the premise that more functionality could be introduced without suffering performance losses due to reduced cross-linking. While this proved to be correct, equally important contributions to selectivity enhancement at the molecular level by conformation control and diastereomeric complexation were also discovered. Monomers derived from L- serine and L-aspartic acid were synthesized and used to prepare MIPs, with the best performance obtained for the MIP formulated with the serine-based cross-linker (N,O-bis-methacryloyl L- serine, 3), versus the aspartic-acid-based cross-linkers and the traditional methacrylic acid/ethylene glycol dimethacrylate (MAA/EGDMA) formulation. Quantitative structure-selectivity relationship (QSSR) studies revealed that the improved performance of 3 was due to three key factors: (1) the cross- linking nature of this monomer; (2) control of conformational flexibility; (3) a strong influence of monomer chirality on enantioselectivity in MIPS

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