Catalytic dehydration of alcohol to olefin and ether by halide clusters of Nb, Mo, Ta and W possessing an octahedral metal core
Catalytic dehydration of alcohol to olefin and ether by halide clusters of Nb, Mo, Ta and W possessing an octahedral metal core
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DOI：
10.1023/a:1022129126499
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发表时间：
2003-01-01
影响因子：
2.8
通讯作者：
Chihara, T
中科院分区：
文献类型：
--
作者：
Kamiguchi, S;Chihara, T
分子卤化物簇，[（M6 Cl 12）Cl-2（H2O）（4）].4H（2）O（M = Nb，Ta）和（H3O）（2）[（M6Cl8）Cl-6].6H（2）O（M = Mo，W），当它们在300 ℃下处理时，对醇脱水生成烯烃和醚具有催化活性。W簇的活性出现在250 ℃，在该温度下，它变为较差的催化活性。结晶的三维连接簇[W 6Cl 8i]（Cl 4Cl 4/2a-a）-Cl-a，并且在400 ℃下降低，在该温度下结晶度提高。
Molecular halide clusters, [(M6Cl12)Cl-2(H2O)(4)].4H(2)O(M = Nb, Ta) and (H3O)(2)[(M6Cl8)Cl-6].6H(2)O (M = Mo, W), develop catalytic activity for the dehydration of alcohols to yield olefins and ethers when they are treated at 300degreesC The activity of the W cluster appears at 250degreesC at which temperature it changes to the poorly crystallized three-dimensional linked cluster [W6Cl8i](Cl4Cl4/2a-a)-Cl-a,and decreases at 400degreesC at which temperature the crystallinity improves.