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化学学报
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化学学报 ›› 1998, Vol. 56 ›› Issue (11): 1106-1111. 上一篇    下一篇

研究论文

混合价Keggin结构磷钨钼杂多化合物的光化学合成及其 电子离域性研究

李培;金松林;刘惠章;林欣荣;谢高阳;邵倩芬   

  1. 复旦大学化学系.上海(200433);复旦大学分析测试中心.上海(200433)
  • 发布日期:1998-11-15

Photochemical syntheses of the mixed-valence Keggin type molybdotungstophosphates and studies on the delocalization of the added electron

Li Pei;Jin Songlin;Liu Huizhang;Lin Xinrong;Xie Gaoyang;Shao Qianfen   

  1. Fudan Univ, Dept Chem.Shanghai(200433);Fudan Univ, Ctr Anal & Measurement.Shanghai(200433)
  • Published:1998-11-15

PDF

482

被引次数

14

采用光化学还原的方法合成了三个混合价的Keggin结构磷钨钼杂多化合物。混合价杂多化合物系一电子还原产物,其骨架结构仍然保持母体杂多阴离子的特征。^3^1P核磁共振,顺磁共振和Evans法的研究表明,"蓝电子"仅在钼原子之间离域。随着钼取代原子数的增多,化合物的顺磁性逐渐减小。

关键词: 光化学反应, 化学合成, 阴离子, 杂多化合物, 磷化合物, 钨化合物, 钼化合物, 混合价, 电子离域, KEGGIN结构

Three mixed-valence Keggin type molybdotungstophosphates have been photochemically synthesized and characterized. These mixed-valence species are products of one electron-reduction, which retain the structural features of their parent polyanions. The research using ^3^1P NMR, EPR and Evans method indicates that the added "blue" electron is delocalized among Mo atoms, and the larger the number of tungsten atoms replaced by molybdenum atoms, the weaker the paramegnetism of the one-electron-reduction species.

Key words: PHOTOCHEMICAL REACTION, CHEMICAL SYNTHESIS, ANION, PHOSPHORUS COMPOUNDS, TUNGSTEN COMPOUNDS, MOLYBDENUM COMPOUNDS, MIXED VALENCE, PARAMAGNETISM

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