9.   Influence of Silane Precursors System Composition on the Catalytic Efficiency of Sol-Gel Immobilized Lipases

Authors: A. Ursoiu, P. Borza, C. Paul and F. Péter


Abstract:

Sol-gel entrapped lipases gained an increasing attention in the last years, as biocatalysts for several practical applications. In this study, lipases from Candida antarctica B (C-Lecta) has been immobilized by sol-gel entrapment using binary and ternary silane precursor systems containing vinyl-trimethoxysilane. The presence of vinyl functional groups in the sol-gel matrix could be important for specific applications that need further functionalization of the sol-gel matrix. The obtained enzymatic preparates were used as biocatalysts for kinetic resolution of racemic 2-hexanol and 2-octanol, by acylation with vinyl acetate in n-hexane medium. The immobilization resulted in high activity and enantioselectivity values.


Keywords: lipase, sol-gel, vinyl-trimethoxysilane, kinetic resolution, secondary alcohols

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