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Reference type: Journal
Authors: Lettau K, Warsinke A, Laschewski A, Mosbach K, Yilmaz E, Scheller FW
Article Title: An esterolytic imprinted polymer prepared via a silica-supported transition state analogue.
Publication date: 2004
Journal: Chemistry of Materials
Volume: 16
Page numbers: 2745-2749.
DOI: 10.1021/cm0352394

Abstract: In this work we describe a new preparation method for an esterolytic imprinted polymer with catalytic sites on the surface. A template was prepared by immobilizing a transition state analogue (phosphoramidic acid derivative) of an esterolytic reaction within porous silica particles. Polymerization within the pores was carried out using 4-vinylimidazole as a functional monomer and divinylbenzene as a cross-linker. The polymer was released by dissolution of the silica support with hydrofluoric acid and catalytic properties were studied by incubation with three different 4-nitrophenylesters and spectrophotometric determination of the released 4-nitrophenol. For 4-nitrophenyl acetate an activity of 211 nmol min-1 mg-1 and a Km value of 2.2 mmol L-1 was obtained.


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