摘要
本文合成了八种未见报道的2:18系列钼磷稀土杂多化合物,它们的通式为Ln_2[P_2Mo_(18)O_(62)]·nH_2O其中Ln为La、Ce、Pr、Nd、Sm、Gd、Tb和Dy。用差热——热重分析、紫外光谱、红外光谱,拉曼光谱和X——射线粉末衍射对这些化合物进行了表征,通过结构分析确认其结构。研究结果表明它们的杂多阴离子具有Dawson结沟,而稀土元素位于杂多阴离子的外界。本文还用循环伏安法对这些化合物的氧化还原性进行了初步探讨。
This paper deals with the synthesis of rare earth molybdophosphate het--eropoly compounds reported first time. They have general formula:Ln_2[P_2M_(18)O_(62)].nH_2O, in which Ln=La, Ce, Pr, Nd, Sm, Gd, Th, Dy. Accordingto the chemical analysis, their compositions were determined. The hetereop-oly compounds were characterized by differential therma-thermogravimetricanalysis, UV, IR, Raman spectra and X-ray powder diffraction. In addition, theredox properties were disscussed by means of cyclic voltammetry. It showsthat these compounds have Dawson structure which rare earth elements arein the outphere of heteropoly anion.
出处
《哈尔滨师范大学自然科学学报》
CAS
1989年第1期41-49,共9页
Natural Science Journal of Harbin Normal University
