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Reference type: Journal
Authors: Wulff G, Vietmeier J, Poll HG
Article Title: Enzyme-analog built polymers .22. Influence of the nature of the cross-linking agent on the performance of imprinted polymers in racemic-resolution.
Publication date: 1987
Journal: Makromolekulare Chemie-Macromolecular Chemistry And Physics
Volume: 188
Issue: (4)
Page numbers: 731-740.
DOI: 10.1002/macp.1987.021880407

Abstract: The effect of the nature of the crosslinking agents in template-imprinted polymers on the selectivity during racemic resolution was investigated. Ethylene dimethacrylate was found to be the best crosslinking agent. The highest selectivity was achieved with polymers which have been prepared with 70-95% crosslinking agent in the monomeric mixture. A new optically active crosslinking agent, 1,4;3,6-dianhydro-D-sorbitol 2,5-dimethacrylate, was synthesized and was used for the preparation of template-imprinted polymers. Interpenetrating networks consisting of two different crosslinking systems did not bring about any significant improvement in selectivity for racemic resolution. A strong temperature effect for racemic resolution was observed; an ethylene dimethacrylate-crosslinked, template-imprinted polymer showed an optimum selectivity at 75C with a ratio of distribution coefficients of the D- and L-isomers of a= 4,56 for the separation of the racemate of the template.


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