The four heteropoly isomers K3H3[α ,β i SiW11Zn(H2O)O39]· XH2O(β i=β 1,β 2,β 3) were prepared and characterized by elementary analysis, IR and UV spectroscopy, polargraphy and cyclic voitammetry, 183W NMR a...The four heteropoly isomers K3H3[α ,β i SiW11Zn(H2O)O39]· XH2O(β i=β 1,β 2,β 3) were prepared and characterized by elementary analysis, IR and UV spectroscopy, polargraphy and cyclic voitammetry, 183W NMR and XPS experiments. And these compounds can catalyze epoxidation reaction of olefine.展开更多
The four heteropoly isomers K6[α-,βi-SiW11ZrO40]·XH2O（βi=β1,β2,β3） were prepared and characterized by elemental analysis,IR and UV spectroscopy,polargraphy and cyclic voitarnmetry,and183WNMR.The order of ...The four heteropoly isomers K6[α-,βi-SiW11ZrO40]·XH2O（βi=β1,β2,β3） were prepared and characterized by elemental analysis,IR and UV spectroscopy,polargraphy and cyclic voitarnmetry,and183WNMR.The order of polarographic half-wave:β2>β1>β3>α,and these compounds can catalyze epoxidation reaction of olefine.The catalytic activity of β isomer is higher than α.展开更多
文摘The four heteropoly isomers K3H3[α ,β i SiW11Zn(H2O)O39]· XH2O(β i=β 1,β 2,β 3) were prepared and characterized by elementary analysis, IR and UV spectroscopy, polargraphy and cyclic voitammetry, 183W NMR and XPS experiments. And these compounds can catalyze epoxidation reaction of olefine.
文摘The four heteropoly isomers K6[α-,βi-SiW11ZrO40]·XH2O（βi=β1,β2,β3） were prepared and characterized by elemental analysis,IR and UV spectroscopy,polargraphy and cyclic voitarnmetry,and183WNMR.The order of polarographic half-wave:β2>β1>β3>α,and these compounds can catalyze epoxidation reaction of olefine.The catalytic activity of β isomer is higher than α.
