Novel inorganic-organic hybrid cluster is constructed by polyoxometalate (POMs) and iron coordination complex. Iron coordinated complex (ML₁) has been synthesized by reacting iron(II)sulphate with N,N dimethylethylenediamine and salicylaldehyde in methanol. Synthesized complex [M(L₁)₂] (1) where M = Fe²⁺ coupled subsequently with H₄SiMo₁₂O₄₀ in presence of nitric acid. Oxidation of Fe²⁺ into Fe³⁺ leads to the formation of a cationic species [Fe(L₁)₂]⁺ which is stabilized in situ by the presence of bulky [SiMo₁₂O₄₀]^4- anion. Precipitated inorganic-organic hybrid [Fe(L₁)₂]₄[SiMo₁₂O₄₀] (2) has been characterized by UV-Visible spectroscopy, IR spectroscopy, PXRD, Cyclic Voltammetry (CV), and thermogravimetric analysis (TGA). The hybrid material is also investigated towards the oxidation of secondary alcohol to corresponding ketone in the presence of hydrogen peroxide. The product formation has been monitored by TLC and UV-visible spectroscopy. Investigation on kinetic aspects was performed for the aforementioned organic conversion by using UV-Visible spectrophotometer. The catalysis used in this study is in heterogeneous fashion and concluded that catalyst can be reused minimum three times without altering the product conversion.