An organic-inorganic material (NH 4 ) 2 (MimAM) 40 [Mo 132 O 372 (CH 3 COO) 30 (H 2 O) 72 ] have been synthesized by reacting [(NH 4 ) 42 [Mo VI 72 Mo V 60 O 372 (CH 3 COO) 30 (H 2 O) 72 ] with the ionic liquid 3-Aminoethyl-1-methylimidazolium bromide. The catalyst showed remarkably a high catalytic performance in the oxidation of dibenzothiophene (DBT) derivatives with H 2 O 2 35% as a safe and green oxidant. The main parameters affecting the process including catalyst, acid additive, hydrogen peroxide amounts and temperature have been investigated in detail. Sulfur removal of DBT in n-heptane reached to 98.3% yield at 40°C using 2.5 mmol H 2 O 2 and 100 mg of (NH 4 ) 2 (MimAM) 40 [Mo 132 O 372 (CH 3 COO) 30 (H 2 O) 72 ] after 90 min. Underthe optimal conditions, BT (benzothiophene), DBT (dibenzothiophene) and 4,6-DMDBT (4,6-dimethyl-dibenzothiophene) achieved high desulfurization efficiency. Our results showed that the reactivity order of different model sulfur compounds are thiophene <4,6-dimethyl dibenzothiophene< dibenzothiophene. The catalysts could be easily separated from the reaction solution by simple filtration and recycled for several times without loss of activity.

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