Metal complexes immobilized onto metal nanoparticles are a category of relatively new promising materials for catalysis and analytical chemistry.(1-2) A magnetically recoverable catalyst consisting of molybdenum complex was prepared. The synthesized catalyst was characterized by X-ray powder diffraction (XRD), vibrating sample magnetometry (VSM), inductively coupled plasma atomic emission spectroscopy (ICP-AES) and Fourier transform infrared (FT-IR). The immobilized catalyst was shown to be an efficient heterogeneous catalyst for the synthesis of substituted pyrroles.(3) The catalyst could be easily and efficiently isolated from the final product solution by magnetic decantation and be reused for 5 consecutive reactions without showing any significant activity degradation.
