文摘
In this study, organic–inorganic hybrid materials based on polyoxometalate and copper coordination polymer, [CuI(4,4′-bipy)]3[PMo 10 VI Mo 2 V O40{CuII(2,2′-bipy)}] designated as CuMo-CP(1), were prepared and characterized by various techniques including X-ray powder diffraction (XRD), infrared spectroscopy (FT-IR), and elemental analysis. It was found that the CuMo-CP(1) can be used as an efficient heterogeneous bifunctional acid-base catalyst for Knoevenagel condensation of aromatic aldehydes and cyclohexanone with malononitrile or ethyl cyanoacetate at 60 °C in ethanol. Obtaining the corresponding Knoevenagel adduct in moderate to excellent conversion yields within 4 h is promising. The catalyst can be easily recovered from the reaction mixture and reused for three times without significant loss of activity. Keywords Cu coordination polymer Mo-polyoxometalate Knoevenagel reaction Heterogeneous catalyst