STUDIES ON REDOX PROPERTIES OF HETEROPOLY ACIDS (SALTS) AND THEIR DERIVATIVES WITH KEGGIN AND DAWSON STRUCTURES  

作　　者：王恩波 陆新红 赵世良 刘景福 张保建 

机构地区：[1]Department of Chemistry, Northeast Normal University, Changchun 130024, PRC

出　　处：《Science China Chemistry》1990年第9期1032-1039,共8页中国科学（化学英文版）

基　　金：Project supported by the National Natural Science Foundation of China.

摘　　要：We have systematically studied redox properties of two series of several dozen heteropoly acids (salts) and their derivatives with vanadium and rare-earth elements with Keggin and Dawson structures, e. g. LnHSiMo_(12), SiMo_(12-n)V_n, M_(1.5)PMo_(12), PMo_(12-n)V_n, PW_(12-n_V_n, Ln(PMo_(11))_2, Sm(XMo_(11))_2 and P_2Mo_(18-n)V_n, etc., and obtained their sequence of oxidation. It was found that there is a linear relationship between the reduction potentials of heteropoly anions and the derivatives of heteropoly anions with rare-earth elements with Keggin structure and nq^2 (n and q are the principal quantum number and charge of the central ion respectively). On the basis of the electrostatic model the regularity of oxidation and reduction was rationalized.We have systematically studied redox properties of two series of several dozen heteropoly acids （salts） and their derivatives with vanadium and rare-earth elements with Keggin and Dawson structures, e. g. LnHSiMo₁₂, SiMo_12-nV_n, M_1.5PMo₁₂, PMo_12-nV_n, PW₍12-n_V_n, Ln(PMo₁₁)₂, Sm(XMo₁₁)₂ and P₂Mo_18-nV_n, etc., and obtained their sequence of oxidation. It was found that there is a linear relationship between the reduction potentials of heteropoly anions and the derivatives of heteropoly anions with rare-earth elements with Keggin structure and nq² （n and q are the principal quantum number and charge of the central ion respectively）. On the basis of the electrostatic model the regularity of oxidation and reduction was rationalized.

关 键 词：HETEROPOLY COMPOUNDS KEGGIN strueture DAWSON structure oxidation reduction 

分 类 号：O6[理学—化学]