铈—钼—砷三元杂多酸胍盐的合成及其性质研究

Preparation and Characterization of the Ternary Heteropoly Complexes of Ce( Ⅳ )and Ce( Ⅲ )with Unsaturated Heteropoly Molybdo-arsenate Ligands

合成了文献中尚未见报导的钸(Ⅳ、Ⅲ)—钼—砷三元杂多酸胍盐。分析确定了它们的组成,并用pH电位滴定法加以证实。此外,用红外光谱分析了上述杂多阴离子可能的构型,应用紫外光谱、差熟与热重分析、循环伏安曲线等研究了它们的性质,并初步探索了合成产物的抑菌性能。

Two guanidine salts of the ternary heteropoly acid formed from Ce (Ⅳ) and Ce (Ⅲ)cations as heteroatoms with unsaturated heteropoly molybdo-arsenate ligands have been prepared and the better conditions for preparation are also given. The analytical data of their components show that the formulae of these salts may be expressed as (CH_6N_3)_(10) [Ce~Ⅳ (AsMo_(11)O_(39))_2]·30H_2O and (CH_6N_3)_(11) [Ce~Ⅲ (AsMo_(11)O_(39))_2]·10H_2O. Infra-red spectra, Ultro-violet spectra, potential titration, thermogravimetric and differential thermal analyses and cyclo-voltampere curves are used to study the foundamental properties of these compounds. By the comparison of the IR spectra for the anions[Ce~Ⅲ(PMo_(11)O_(39))_2^(11-), [Ce~Ⅲ (SiMo_(11)O_(39))_2]^(13-) and [Ce~Ⅲ (AsMo_(11)O_(39))_2]^(11-) the modes of coordination of [(AsMo_(11)O_(39))]^(7-) in the structure are discussed.