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用取代法制备了十二钼锗 (硅 )酸的Pd ,Ir ,Ru取代化合物 .由IR ,UV及EPR方法测定表明 ,产物仍保持了其母体化合物的Keggin结构 ,同时Pd ,Ir,Ru等贵金属阳离子确实取代了Keggin结构中的一个Mo原子 .电化学研究表明Ru ,Ir取代了母体化合物中的 1个Mo后 ,多酸母体上的氧化 还原可逆性增强 ;而Pd取代化合物由于在电极上的吸附作用使其电化学行为不能被清晰观察到 .对上述化合物初步的催化研究表明 ,这几个化合物均有较好的催化氧化环己烯的活性 .
The Pd, Ir and Ru substituted compounds of germanium dodecylsilicate were prepared by the substitution method. The results of IR, UV and EPR showed that the product still retained the Keggin structure of its parent compound, while Pd, Ir, Ru and the like Precious metal cations indeed replace a Mo atom in the Keggin structure.Electrochemical studies show that the redox reversibility of polyacid precursors is enhanced when Ru and Ir replace one Mo in the parent compound, The electrochemical behavior of the compounds can not be clearly observed.A preliminary catalytic study on the above compounds shows that these compounds have good catalytic activity for cyclohexene oxide oxidation.