波谱学杂志 ›› 1988, Vol. 5 ›› Issue (3): 197-206.

• 研究论文 •    下一篇

杂多阴离子的NMR和ESR研究——P-V-W Keggin阴离子的31P、51V、17O-NMR谱

岳世泰, 华士英, 裘祖文   

  1. 吉林大学理论化学研究所
  • 收稿日期:1987-06-15 出版日期:1988-09-05 发布日期:2018-01-22
  • 基金资助:
    国家自然科学基金委员会资助题目

NMR AND ESR STUDY OF HETEROPOLYANIONS THE 31P、51V、17ONMR SPECTRA OF P-V-W KEGGIN ANIONS

Yue Shitai, Hua Shiying, Qiu Zuwen   

  1. Inslttute of Theoretical Chemstry, Jilin Univrsitey
  • Received:1987-06-15 Online:1988-09-05 Published:2018-01-22

摘要: 本文合成了六种含有P-V-W和V-V-W Keggin结构的杂多阴离子,并研究了它们的31P、51V、17O-NMR谱,对于PVxW12-xO40(x+3)-(x=1~4)阴离子,当x=1时,31P和51V-NMR谱只有一条线,并且此线化学位移和pH无关。当x ≥ 2时,谱线数目随着x迅速增加,其原因是几何异构体的数目和类型迅速增加。它们的化学位移δp,和δv。依赖于溶液的酸性和x,即δp,随pH值和x增加而减少,而δv,却随pH和x的增加而增加。最后简短讨论了桥氧上质子化的影响。

关键词: 杂多阴离子, NMR

Abstract: Six heteropolyanions belong to P-V-W and V-V-W Keggin structures were synthesized and their 31P, 51V, 17O NMR spectra were reported in this paper. For the PVxW12-xO40(x+3)-(x=1-4)anions, when x=l the 31P, 51V NMR spectra only contain a single line which is independent on the pH of thesoiution. While x ≥ 2, the number and species of the geometric isomers increase. Their chemical shifts δp and δv were closely related to the acidity of the solution and x, i. e. δp decreases and δv incrases respectively with the pH value of the solution and x increases. Finally, the effect of the protonation to the bridged oxygen is also. briefly discussed.

Key words: Heteropolyanions, NMR