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Abstract: Using Zn(II)-quercetin complex as template, a metal-complexing template polymer was prepared in methanol by molecular imprinting technique. The coordination mode and complex molar ratio between quercetin and Zn(II) were studied in differential UV absorption spectrometry, and the ternary complexation of quercetin, Zn(II) and 4-vinylpyridine was verified by similar methods. The molecularly imprinted polymers(MIPs) prepared were analyzed via infrared spectra, and it showed that MIPs had the necessary characteristics of the structure. In order to optimize the reaction ratio of MIPs, the effect of functional monomer and cross-linking agent dosage on the binding capacity of MIPs was studied with equilibrium binding experiments. The selective binding experiments for substrates indicated that compared with quercetin's (rutin and naringenin), Zn(II)-quercetin template polymer exhibited significant adsorption selectivity for Zn(II)-quercetin complex. The separation factors were 3.21 and 1.91 respectively.
Template and target information: Zn(II)-quercetin
Author keywords: imprinted polymer, quercetin, Zn(II), complex ratio, coordination mode