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Acta Chimica Sinica ›› 2007, Vol. 65 ›› Issue (21): 2357-2362.     Next Articles

双过氧钒配合物与N-取代皮考啉酰胺相互作用的NMR研究

李国斌1，于贤勇1,2，郑柏树1，易平贵*,1,2，唐臻强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:2007-02-03 修回日期:2007-05-28 发布日期:2007-11-14
  • 通讯作者: 陈忠

NMR Studies on Interactions between Diperoxovanadate and N-Substituted Picolinamide

LI Guo-Bin1; YU Xian-Yong1,2; ZHENG Bai-Shu1; YI Ping-Gui*,1,2; TANG Zhen-Qiang1; CHEN Zhong*,2   

  1. (1 Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical En-gineering, Hunan University of Science and Technology, Xiangtan 411201)
    (2 State Key Laboratory for Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361005)
  • Received:2007-02-03 Revised:2007-05-28 Published:2007-11-14
  • Contact: CHEN Zhong

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To understand the substituting effects of organic ligands on the reaction equilibrium, the interactions between diperoxovanadate complex [OV(O2)2(D2O)]−/[OV(O2)2(HOD)]− and a series of N-substituted picolinamide ligands in solution were explored using multinuclear (1H, 13C, and 51V) magnetic resonance, COSY, DOSY, and variable temperature NMR in 0.15 mol/L NaCl ionic medium for mimicking the physiological conditions. The order of reactive capability of the picolinamide-like ligands with [OV(O2)2(D2O)]−/[OV(O2)2(HOD)]− is as follows: N-methylpicolinamide≈N-(2-hydroxyethyl)picolinamide＞N-ethylpicolinamide＞N-propylpicolinamide. The substituting group influences the reactivity by an electron effect. Competitive coordination interactions result in a series of new seven-coordinated peroxovanadate species [OV(O2)2L]− (L＝N-substituted picolinamide).

Key words: diperoxovanadate, N-substituted picolinamide, interaction, NMR