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合成了过渡金属二取代钨钼三元杂多酸盐:[TBA]4H3[PW7Mo3M2O38(H2O)2](M=Fe2+、Co2+、Cu2+、Ni2+、Mn2+),并利用红外光谱、紫外光谱对其结构进行表征,结果表明:它们都是具有Keggin结构的杂多化合物;并且利用它们催化合成乙酸乙酯,确定了最佳反应条件:酸醇物质的量比为1∶2;催化剂用量占总量的1%;最佳反应时间为5h;考察了它们的催化性能,其催化活性为:[TBA]4H3PW7Mo3Mn2O38(H2O)2>[TBA]4H3PW7Mo3Ni2O38(H2O)2>[TBA]4H3PW7Mo3Co2O38(H2O)2>[TBA]4H3PW7Mo3Cu2O38(H2O)2>[TBA]4H3PW7Mo3Fe2O38(H2O)2。
Synthesis of a transition metal disubstituted tungsten and molybdenum ternary heteropolyacid salt: [TBA] 4H3 [PW7Mo3M2O38 (H2O) 2] (M = Fe2 +, Co2 +, Cu2 +, Ni2 +, Mn2 +), and its structure The results showed that all of them were heteropoly compounds with Keggin structure. And they were used to catalyze the synthesis of ethyl acetate. The optimal reaction conditions were obtained: the molar ratio of alcohol to alcohol was 1: 2, the amount of catalyst The best reaction time was 5h. The catalytic activities of the catalysts were investigated: [TBA] 4H3PW7Mo3Mn2O38 (H2O) 2> [TBA] 4H3PW7Mo3Ni2O38 (H2O) 2> [TBA] 4H3PW7Mo3Co2O38 (H2O) 2> TBA] 4H3PW7Mo3Cu2O38 (H2O) 2> [TBA] 4H3PW7Mo3Fe2O38 (H2O) 2.