The Effect of Various ligands on Catalytic Performance of MoOx/nitrogenous Nanowires
Paper ID : 1204-ICNS
Authors:
Aliyeh Feghhi1, Reihaneh Malakooti *2
1Department of Chemistry, College of Sciences, University of Birjand, Birjand, Iran.
2Department of Chemistry, College of Sciences, University of Birjand, Birjand, Iran
Abstract:
The MoOx/nitrogenous ligand (pyridine (1), imidazole (2), ethylenediamine (3) and aniline (4)) hybrids with wire morphology were synthesized via an easy wet chemical method at room temperature in water. The hybrid products were characterized by different methods, including X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), N2-adsorption/desorption and elemental analysis. Then, these materials were used and compared in Knoevenagel condensation reaction as heterogeneous bi-functional catalysts. For most of the aldehydes in the reaction with malononitrile, the yields were above 95%. The reactions were carried out in aqueous media under mild temperature. In addition no extra base or acid were used. The catalysts were very stable under these conditions and after 12 cycles reaction under optimized conditions, no remarkable decrease of catalytic efficiency was detected. It was found that the efficiency of the hybrid catalyst was changed by synthesized structures with different ligands with different acidic strength.
Keywords:
Knoevenagel condensation, Organic-inorganic hybrid, Bi-functional catalyst
Status : Abstract Accepted (Poster Presentation)