Preparation And Catalytic Application Of Polynuclear Molybdate-sulfur Clusters Containing [Mo₂O₂S₂]²⁺ Units

[Mo2O2S2]2+ cation is an amazing modular components, it can not only form cyclic polynuclear molybdenum cluster compounds by self-condensation reaction, but also can reassemble two or even more lacunary POMs to form supramolecular clusters base on their own good coordination ability. Therefore, the appearance of [Mo2O2S2]2+ has inject new vitality for inorganic chemistry. Traditional molybdenum-sulfur and molybdenum-oxygen type HDS catalyst can not meet the needs of industry, so development of new HDS catalysts is a challenging subject. In this paper, HDS catalytic performance of molybdate-sulfur clusters containing [Mo2O2S2]2+ units was systematically investigated. The thesis mainly contains two parts:1. In this paper, six complexes, such as(K2-x(NMe4)x[I2Mo10O10S10(OH)10(H2O)5] ·20-H2O(1),(NH4)2[Mo3ⅣS(S2)6]·2H2O(2),(NH4)2[Mo2Ⅴ(S2)6]·2H2O(3),(Me4N)2[Mo9-S8O12(OH)8(H2O)2]·5H2O(4), Cs3[Mo12O12S12(OH)12(C9H3O6)]·22H2O(5) and Cs2[Mo12O12S12(OH)12(C8H4O4)]·26H2O(6) were prepared according to the literature. The structure and thermalstability of the complexes were characterized by TGA, XRD and IR.2. The above six complexs were loaded by SBA-15 to get heterogeneous catalysts, which were characterized by XRD, nitrogen adsorption and high resolution transmission electron microscopy. The HDS catalytic performance of these heterogeneous catalysts was tested on thiophene at different temperatures.