Triazole-directed fabrication of polyoxovanadate-based metal–organic frameworks as efficient multifunctional heterogeneous catalysts for the Knoevenagel condensation and oxidation of alcohols

Three polyoxovanadate-based metal–organic frameworks have been synthesized. [Ni₃(4-NH₂-trz)₆][V₆O₁₈]·3H₂O (1) exhibited extraordinary heterogeneous catalytic performance in Knoevenagel condensation and moderate catalytic activity in the oxidation of aromatic alcohols.