高等学校化学学报

高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (4): 622.

• 论文 • 上一篇    下一篇

杂多酸盐催化剂中反荷离子对V4+离子影响的ESR研究

郑莹光1, 董凤霞1, 吴通好2, 贾继飞2   

  1. 1. 吉林大学分析测试中心, 长春 130023;
    2. 吉林大学化学系
  • 收稿日期:1995-04-03 出版日期:1996-04-24 发布日期:1996-04-24
  • 通讯作者: 郑莹光,女,50岁,高级工程师.
  • 作者简介:郑莹光,女,50岁,高级工程师.

ESR Studies of the Effects of Counter Ions on V4+ Ion in Heteropolyacid Salts Catlysts

ZHENG Ying-Guang1, DONG Feng-Xia1, WU Tong-Hao2, JIA Ji-Fei2   

  1. 1. Analytical Measurement Center, Jilin University, Changchun 130023;
    2. Department of Chemistry, Jilin Unitiersity
  • Received:1995-04-03 Online:1996-04-24 Published:1996-04-24

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摘要： 用ESR方法研究了异丁醛一步氧化制甲基丙烯酸杂多酸盐催化剂中过渡金属离子Cu2+、V4+的状态。将卷积差方法应用于ESR谱增强了过渡金属离子的分辨率。从复杂和重叠谱中检测配位到杂多阴离子上的V4+波谱参数,计算了α2+和K值。讨论了反荷离子Cu2+及各种碱金属对V4+上电子云密度、未成对电子离域性及V-O键性质的影响。

关键词: 杂多酸盐, Cu2+、V4+, ESR

Abstract: The transition metal ions Cu2+ and V4+ in heteropolyacid salts used in one-stepoxidition of isobutyraldehyde(IBL)to produce methacrylic acid(MAA) were studied by ESRmethod.The convolution difference method was applied to the resolution enhancement ofESRspectra of transition metal ions.Spectral parameters of V4+ coordinated to heteropolyanion was detected from complicated and superposed spectra.Furthermore,α2 and Kwerecomputed.We have also discussed the effects of the counter ions Cu2+ and various kinds ofalkali metals on the electron cloud density and delocalization of unpaired electrons and property of V—O bond.

Key words: Heteropolyacid salt, Cu2+, V4+, ESR

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