化学学报 ›› 1998, Vol. 56 ›› Issue (7): 700-706. 上一篇    下一篇

研究论文

过氧钛钨硅杂多配合物的合成、表征及催化活性

单秋杰;龚剑;石绍庆;瞿伦玉   

  1. 东北师范大学化学系
  • 发布日期:1998-07-15

Synthesis, characterization and oxidation activity of peroxotitanium-containing heteropolytungstates with Keggin structure

SHAN QIUJIE;GONG JIAN;SHI SHAOQING;JU LUNYU   

  • Published:1998-07-15

合成了过氧钛钨硅杂多酸盐α-M6-mHm[SiW11(TiO2)O39].xH2O和α-M10-mHm[SiW9(TiO2)3O37].xH2O(M=K, TBA), 用IR, UV吸收光谱,极谱-循环伏安, 183W NMR, XPS和XRD等测试方法对其性质、结构进行研究。结果表明, 它们都是具有Keggin结构的过氧杂多配合物,TiO2基的引入将其极谱半波电位提高至-0.3V以上, 它们对顺丁烯二酸的H2O2环氧化反应具有显著高的催化活性。

关键词: 紫外分光光度法, 红外分光光度法, 杂多酸, X射线衍射分析, X射线光电子谱法, 过氧化氢, 循环伏安法, 催化活性, 钨183核磁共振谱法, 顺丁烯二酸

Six new complexes α-M6-mHm[SiW11(TiO2)O39].xH2O, α-M10-mHm[SiW9(TiO2)3O37].xH2O and α -M6-mHm[SiW11TiO40].xH2O (M=K, TBA) were synthesized and characterized by IR and UV spectroscopy, polarography and cyclic voltammetric, 183W NMR, XPS and XRD methods. The experimental results indicate that they are all the Keggin structure and the reduced electric potential of the complexes arise over -3.0V with entering of TiO2 grops. This complexes had high activity for the epoxidation of Maleic acid using H2O2 oxidant.

Key words: ULTRAVIOLET SPECTROPHOTOMETRY, INFRARED SPECTROPHOTOMETRY, HETEROPOLYACID, X-RAY DIFFRACTION ANALYSIS, X-RAY PHOTOELECTRON SPECTROMETRY, HYDROGEN PEROXIDE, CYCLOVOLTAMGRAPH, CATALYTIC ACTIVITY, MALEATE

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