A new 2D cadmium coordination polymer based on hydroxyl-substituted benzenedicarboxylic acid as an effective heterogeneous catalyst for Knoevenagel condensation

A self-assembled new 2D cadmium network, [Cd (BDC-OH)(DMF)(2)center dot DMF](n)(Cd-BDC-OH), was synthesized based on 2-hydroxyterephthalic acid (BDC-OH) ligand and utilized as a heterogeneous catalyst for Knoevenagel condensation. The structure was fully elucidated by single-crystal X-ray diffraction, Hirshfeld surface analysis, powder X-ray diffraction, field emission-scanning electron microscopy, Fourier transform-infrared spectroscopy and thermogravimetric analysis. The fabricated coordination polymer exhibited high catalytic activity under ambient conditions, and was used without significant drop in product yield in further cycles.