| 过氧铌杂多配合物位置异构体的合成、表征及催化性能 |
| Synthesis, Characterization and Catalysis of Heteropolytungstates Containing Peroxyniobium |
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| 摘要: 合成了6种钨硅杂多配合物异构体α、βi-M3H2[SiW11(NbO2)O39]·H2O(M=Me4N+(TMA),Bu4N+(TBA),Et4N+(TEA);βi=β1,β2,β3)。IR光谱、UV光谱、极谱、I--S2O32-滴定证明合成的杂多配合物中有NbO2基存在, 183W NMR光谱证明其阴离子具有Keggin结构,催化实验结果表明,合成的化合物对烯烃环氧化反应具有催化活性,且过氧杂多配合物的催化活性高于非过氧杂多配合物,β异构体的催化活性高于α。 |
| 关键词: 过氧铌钨硅杂多配合物 异构体 环氧化反应 催化活性 |
| 基金项目: |
| Abstract: The six heteropoly isomers α、βi-M3H2[SiW11(NbO2)O39]·H2O(M=Me4N+(TMA),Bu4N+(TBA),Et4N+(TEA);βi=β1,β2,β3) were synthesized and characterized. The IR, UV spectrometry, polarography and chemical titration comfirmed the ex-istence of NbO2 groups in the complexes. All their 183W NMR spectra have six peaks, showing the Keggin structure of anions in the compounds. Experiments on oxidation of maleic acid into tartaric acid showed that the complexes containing peroxy ions exhibited higher catalytic activity than those without peroxy ions. |
| Keywords: peroxyniobiun heteropolytungstates isomer epoxidation catalytic activity |
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| 马荣华,刘春涛,瞿伦玉.过氧铌杂多配合物位置异构体的合成、表征及催化性能[J].无机化学学报,2002,18(3):275-278. |
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