Acta Chimica Sinica ›› 2007, Vol. 65 ›› Issue (16): 1548-1554. Previous Articles     Next Articles

Original Articles

NMR研究N-甲基咪唑与双过氧钒配合物的相互作用

于贤勇1,2, 李国斌1, 郑柏树1, 黄昊文1, 易平贵*,1,2, 彭洪亮1, 陈忠*,2   

  1. (1湖南科技大学化学化工学院 分子构效关系湖南省普通高等学校重点实验室 湘潭 411201)
    (2厦门大学固体表面物理化学国家重点实验室 厦门 361005)
  • 投稿日期:2007-03-28 修回日期:2007-05-22 发布日期:2007-08-28
  • 通讯作者: 易平贵

NMR Studies on Interactions between Diperoxovanadate Complexes and 1-Methylimidazole

YU Xian-Yong1,2; LI Guo-Bin1; ZHENG Bai-Shu1; HUANG Hao-Wen1; YI Ping-Gui*,1,2; PENG Hong-Liang1; CHEN Zhong*,2   

  1. (1 Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201)
    (2 State Key Laboratory for Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361005)
  • Received:2007-03-28 Revised:2007-05-22 Published:2007-08-28
  • Contact: Ping-gui YI

To understand the effects of organic ligands of the diperoxovanadate complexes on the reaction equilibrium, the interactions between a series of diperoxovanadate complexes [OV(O2)2LL']n− [n=1~3; LL'=oxalate, abbr. oxa; picolinate, abbr. pic; 2,2'-bipyridine abbr. bipy; and 1,10-phenanthroline, abbr. phen. The corresponding peroxovanadate species abbreviate bpV(oxa), bpV(pic), bpV(bipy), and bpV(phen)] and 1-methylimidazole (abbr. N-Me-Im) in solution were explored using multinuclear (1H, 13C, and 51V) magnetic resonance, COSY, and variable temperature NMR in 0.15 mol/L NaCl ionic medium for mimicking the physiological conditions. The experimental results indicated the activity order of these four complexes with 1-methylimidazole as follows: bpV(oxa)>bpV(pic)>bpV(bipy)>bpV(phen). Both the coordinating capability and the steric effect of the organic ligands affect the reaction equilibrium. At the same time, a new six-coordinated peroxovanadate species [OV(O2)2(N-Me-Im)] is formed due to the competitive coordination.

Key words: diperoxovanadate, 1-methylimidazole, interaction, NMR