Inorganic Chemistry, Vol.57, No.1, 56-63, 2018
pH-Controlled One Pot Syntheses of Giant Mo2O2S2-Containing Seleno-Tungstate Architectures
Self-assembly reactions of Na2WO4, SeO2/SeO32-, and [Mo2O2(mu-S)2(H2O)(6)](2+) give, depending on the pH value, two new large polyoxometalate complexes: i.e., [(gamma-Se2W14O52)(3)(Mo2O2(mu-S)(2)(H2O)(2))(6)](24-) (1) isolated at pH 3.5 and [(gamma-Se2W14O52)(4)(WO3(H2O))(8)(W2O5)(2)(W4O12)(2)(Mo2O2(mu-S)(2)(H2O)(2))(4)(Mo2O2(mu-S)(2)(SeO3))(4)](36-) (2) isolated at pH 2. Both compounds were characterized in the solid state by single -crystal X-ray diffraction, EDX, elemental analysis, TGA, and FT-IR and in solution by ESI-MS and NMR.