Add time:09/03/2019         Source:sciencedirect.com

Zeolite-Y entangled complexes based heterogeneous catalysts of VO(IV), Mn(II), Fe(II), Co(II), Ni(II) and Cu(II) and Schiff base ligand HMIMMPP = 4-(((2-hydroxy-5-methylphenyl)imino)methyl)-3-methyl-1-phenyl-1H-pyrazol-5-ol were prepared. The products were characterized by BET, FTIR, elemental analysis, SEM, thermogravimetric analysis, XRD and UV–Vis analysis. All entangled complexes and their neat complexes were utilized in the catalysis of α-pinene via tBuOOH as oxidative agent. α-pinene yielded verbenol and verbenone as major products due to the oxidative reaction. Conversion of products from reactant were in decreasing order as: [VO(HMIMMPP)(H2O)]-Y > [VO(HMIMMPP)(H2O)] > [Co(HMIMMPP)(H2O)]-Y > [Cu(HMIMMPP)(H2O)]-Y > [Ni(HMIMMPP)(H2O)]-Y > VO-Y > [Fe(HMIMMPP)(H2O)3]-Y > [Mn(HMIMMPP)(H2O)3]-Y > Na-Y. The entangled catalysts showed no metal leaching, easily recovery and reusability.

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