本文用改进的方法首次合成出 K_7A(H_2O)CuW_(11)O_(39)·xHzO(A=Al,Ga,In).通过化学分析、离子交换、IR,UV,x-射线衍射等对合成产物进行了鉴定.在此基础上对其热性质和在溶液中的某些性质进行了研究.在 IR 谱中,随周期数增加,振动...本文用改进的方法首次合成出 K_7A(H_2O)CuW_(11)O_(39)·xHzO(A=Al,Ga,In).通过化学分析、离子交换、IR,UV,x-射线衍射等对合成产物进行了鉴定.在此基础上对其热性质和在溶液中的某些性质进行了研究.在 IR 谱中,随周期数增加,振动频率向低波数移动.x-射线衍射表明,对给定的杂原子在杂多阴离子与不同的3A 主族元素作用中差别不大.展开更多
The synthesis of new types of heteropoly compounds is an important aspect in the basic studies on heteropoly acidic catalysts. The ternary heteropoly compounds formed by substituting transition metals for tungsten in ...The synthesis of new types of heteropoly compounds is an important aspect in the basic studies on heteropoly acidic catalysts. The ternary heteropoly compounds formed by substituting transition metals for tungsten in 12-heteropoly compounds remain Keggin struc ture with excellent catalystic activity. However, potassium 11-tungstochromate containing transition metals has not been reported. We synthesized K<sub>n</sub>[Z （H<sub>2</sub>O）Cr W<sub>11</sub> O<sub>39</sub>] XH<sub>2</sub>O (Z=Fe<sup>3+</sup>, Co<sup>2+</sup>, Ni<sup>2+</sup> and Zn<sup>2+</sup>) by an improved method. The product was characterized by chemical analysis, ion-exchange, IR, UV and XPS.展开更多
文摘本文用改进的方法首次合成出 K_7A(H_2O)CuW_(11)O_(39)·xHzO(A=Al,Ga,In).通过化学分析、离子交换、IR,UV,x-射线衍射等对合成产物进行了鉴定.在此基础上对其热性质和在溶液中的某些性质进行了研究.在 IR 谱中,随周期数增加,振动频率向低波数移动.x-射线衍射表明,对给定的杂原子在杂多阴离子与不同的3A 主族元素作用中差别不大.
基金Project supported by the National Natural Science Foundation of China.
文摘The synthesis of new types of heteropoly compounds is an important aspect in the basic studies on heteropoly acidic catalysts. The ternary heteropoly compounds formed by substituting transition metals for tungsten in 12-heteropoly compounds remain Keggin struc ture with excellent catalystic activity. However, potassium 11-tungstochromate containing transition metals has not been reported. We synthesized K<sub>n</sub>[Z （H<sub>2</sub>O）Cr W<sub>11</sub> O<sub>39</sub>] XH<sub>2</sub>O (Z=Fe<sup>3+</sup>, Co<sup>2+</sup>, Ni<sup>2+</sup> and Zn<sup>2+</sup>) by an improved method. The product was characterized by chemical analysis, ion-exchange, IR, UV and XPS.
