M. Yoshikawa, J. Izumi
Sep 1, 2003
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0
Influential Citations
45
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Journal
Macromolecular Bioscience
Abstract
Molecularly imprinted polymeric membranes were prepared from polystyrene resin bearing tetrapeptide derivatives H-Asp(OcHex)-Leu-Asp(OcHex)-Glu(OBzl)-OCH 2 - (DLDE) consisting of D-amino acid residues or L-amino acid residues. The tetrapeptide derivatives were converted into chiral recognition sites by using not only an optically pure Boc-Trp but also racemic Boc-Trps as a print molecule. The chiral recognition ability depends on the combination of the absolute configuration of the print molecule and that of constituting amino acid residues. The membrane prepared from a DLDE derivative consisting of D-amino acid residues and imprinted by Boc-D-Trp recognized the D-isomer in preference to the corresponding L-isomer and vice versa. In the present study, it was also made clear that racemic print molecules were effective in generating chiral recognition sites. The affinity constant of the generated chiral recognition site was determined to be 9.6 × 10 3 mol -1 . dm 3 , which was independent of the molecular imprinting conditions. Enantioselective permeation was attained by applying electrodialysis. An optimum perm-selectivity of 5.9, which corresponds to the adsorption selectivity, was attained.