Abstract

Recently, great interest is focused on developing synergic catalysis that the reactants are bound and oriented at two different centers. In this context, by simultaneously introducing Lewis acid and Lewis basic into a polyoxometalate based metal-organic framework, a pair of enantiomer NH2-Co-PYIs were achieved and characterized by IR, PXRD, CD, TGA. NH2-Co-PYIs displayed high catalytic activity and selectivity in synergic catalysis Aldol/Knoevenagel condensation as bifunctional catalysts. Multiple catalytic active sites were orderly distributed and spatial matching, which would be a powerful approach to increase the stability and the corresponding functions and to enhance their reactivity through a synergistic cooperation between different catalysis sites.

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