JMS_V5_N1_RP1 Shiva Arun Amreen Naz Shahid Suhail Narvi Narendra Deo Pandey Journal on Material Science 2347–615X 5 1 1 8 Polyoxometalate, Organic-Inorganic Hybrid, Catalytic Activity, Heterogeneous Catalyst, Green Chemistry The organic-inorganic hybrid consisting of cobalt complex attached to Keggin type phosphotungstic acid (H3PW12O40), by ionic interaction was synthesized and characterized by FT-IR (Fourier Transform Infrared), elemental analysis, SEM (Scanning Electron Microscope), EDX (Energy Dispersive X-ray Analysis), powder-XRD (X-Ray Diffraction), and DRUV-Vis. The synthesized cobalt complex [Co(ethyldm) ]Cl (where ethyldm=ethylenediamine) was immobilized by phosphotungstic acid (H3PW12O40) in solvothermal condition, thus synthesizing a new organic-inorganic hybrid [Co(ethyldm)3 (HPW12O40 )]. The [Co(ethyldm)3]Cl2 and [Co(ethyldm)3(HPW12O40)] were studied for their catalytic activity for oxidative conversion of 1,2,3,4-tetrahydronaphthalene (tetralin). The hybrid [Co(ethyldm)3(HPW12O40 )] was used multiple times to catalyse the substrate. The catalytic activity of [Co(ethyldm)3]Cl2 and [Co(ethyldm)3(HPW12O40)] as heterogeneous catalyst were monitored by Gas Chromatography (GC) and the products formed during catalysis were analyzed by Mass Spectroscopy (MS). April - June 2017 Copyright © 2017 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=13480