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采用直接法合成了8种稀土元素取代的钨砷杂多配合物,通过ICP和TG曲线确定了其化学式为K11[Ln(AsW11O39)2].xH2O,采用IR、UV、XRD1、83WNMR等方法对配合物结构进行了表征,结果表明合成配合物为β2-Keggin结构。TG-DTA分析对合成配合物的热稳定性考察表明,配合物在515~545℃分解。
Eight kinds of heteropoly complexes of tungsten and arsenides substituted with rare earth elements were synthesized by the direct method. The chemical formula of K11 [Ln (AsW11O39) 2] xH2O was determined by ICP and TG curves. IR, UV, XRD1, The structure of the complex has been characterized, the results show that the synthetic complex is β2-Keggin structure. TG-DTA analysis of the thermal stability of the synthesis of complexes showed that the complex decomposition at 515 ~ 545 ℃.