Two metal–organic frameworks based on pyridyl–tricarboxylate ligands as size-selective catalysts for solvent-free cyanosilylation reaction

Abstract

Two new three-dimensional metal–organic frameworks {[(CH₃)₂NH₂]₂[TM₂(L)₂]}_n·x(solvent) (FJI-Y7, FJI = Fujian Institute, TM = Zn; FJI-Y8, TM = Cd) have been solvothermally prepared based on multifunctional pyridyl–tricarboxylate ligand 5-(5-carboxypyridin-3-yl)benzene-1,3-dicarboxylic acid (H₃L). Single crystal X-ray analysis reveals that they possess non-interpenetrating binodal (4,4)-connected three-dimensional PtS-type networks with the Schläfli point symbol of {4²·8⁴}. Interestingly, both FJI-Y7 and FJI-Y8 can be used as highly efficient size-selective heterogeneous catalysts for the solvent-free cyanosilylation of acetaldehydes under mild conditions.