Four complexes K8[P2W 17TiO 62]·5H2O, K8[P2W 17TiO 61]·9H2O, K8[P2W 17TiO 62]·7H2O and K8[P2W 17（ZrO2）O 61]·4H2O were synthesized by the cubic selective method and characte- rized by IR and UV sp...Four complexes K8[P2W 17TiO 62]·5H2O, K8[P2W 17TiO 61]·9H2O, K8[P2W 17TiO 62]·7H2O and K8[P2W 17（ZrO2）O 61]·4H2O were synthesized by the cubic selective method and characte- rized by IR and UV spectroscopy, polarography, cyclic voltammetry and 183W NMR methods. The results indicate that they all have Dawson structure with high catalytic activity in the epoxidation of maleic acid by H2O2. Peroxotitanium mono-substituted tungstophosphate, K8[P2W 17（TiO2）O 61]·9H2O, has the highest catalytic activity to give sodium epoxy-maleate in yield of 86.21%.展开更多
文摘Four complexes K8[P2W 17TiO 62]·5H2O, K8[P2W 17TiO 61]·9H2O, K8[P2W 17TiO 62]·7H2O and K8[P2W 17（ZrO2）O 61]·4H2O were synthesized by the cubic selective method and characte- rized by IR and UV spectroscopy, polarography, cyclic voltammetry and 183W NMR methods. The results indicate that they all have Dawson structure with high catalytic activity in the epoxidation of maleic acid by H2O2. Peroxotitanium mono-substituted tungstophosphate, K8[P2W 17（TiO2）O 61]·9H2O, has the highest catalytic activity to give sodium epoxy-maleate in yield of 86.21%.
