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Encapsulation of [Fe(bipy)Cl4][bipy.H] (1) (where bipy is 2,2′-bipyridine) in the Al-MCM-41 molecular sieve by using a “ship in a bottle synthesis” approach was achieved and the product characterized by X-ray diffraction, FTIR, DRS, TG, EDS and BET analysis. Encapsulation of the complex into the channels of Al-MCM-41, did not affect the morphology of the host as is evident from SEM and TEM micrographs. The obtained nanocatalyst in combination with K2S2O8 as the oxidant, was successfully used in selective catalytic conversion of dibenzo[b,f][1,4]oxazepine (CR, riot control agent) to dibenzo[b,f][1,4]oxazepin-11(10H)-one as a potential decontamination route. Good selectivity was also obtained toward formation of benzil in the oxidation of trans-stilbene.