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电化学(中英文) ›› 2001, Vol. 7 ›› Issue (2): 167-172. 

• 研究论文 • 上一篇    下一篇

双核钌配合物中金属间相互作用的电化学研究

李红,巢晖,计亮年,蒋雄   

  1. 中山大学化学与化学工程学院!广东广州510275.华南师范大学化学系,广东广州510631,中山大学化学与化学工程学院!广东广州510275,中山大学化学与化学工程学院!广东广州510275,华南师范大学化学系!广东广州510631
  • 收稿日期:2001-05-28 修回日期:2001-05-28 出版日期:2001-05-28 发布日期:2001-05-28

Electrochemical Studies on the Intermetallic Interaction in Binuclear Ruthenium(Ⅱ) Complexes

LI Hong 1,2 ,CHAO Hui 1,JI Liang_nian 1* , JIANG Xiong 2   

  1. (1.School of Chem.and Chem.Engin.,Zhongshan Univ.,Guangzhou Guangdong 510275,China; 2.Dept.of Chem.,South China Normal Univ.,Guangzhou Guangdong 510631,China
  • Received:2001-05-28 Revised:2001-05-28 Published:2001-05-28 Online:2001-05-28

摘要: 应用循环伏安、循环交流伏安和微分电容测定等电化学方法研究了由 2 ,2一联吡啶(bpy)和桥联配体 1,4_二 [2_咪唑并 [4 ,5_f]邻菲咯啉 ]苯 (DIPB)或 1,4_二 [2_脱氢咪唑并 [4,5_f]邻菲咯啉 ]苯 (DIPB_2H)所形成的对称双核钌配合物 (Ru2 :(bpy) 2 Ru(DIPB)Ru(bpy) 2 (ClO4 ) 4 和Ru2_2H :(bpy) 2 Ru(DIPB_2H)Ru(bpy) 2 (ClO4 ) 2 )在铂电极上的电化学性质以及金属间的相互作用 .研究结果表明 ,在 0 .1mol/L高氯酸四丁基铵 (TBAP)的乙腈溶液中 ,中心离子在循环伏安图上均呈现 1对可逆的 2电子氧化还原波 ,电位也几乎不变 ,其所对应的配位阳离子的扩散系数分别为 3.50×10 - 6 cm2 /s和 3.94× 10 - 6 cm2 /s.循环交流伏安和微分电容测定研究发现 ,桥联配体去质子化后 ,中心离子间的电子相互作用增强

关键词: 双核钌(Ⅱ)配合物, 去质子化, 电化学性质, 电子相互作用

Abstract: The electrochemical characteristics and intermetallic interaction of symmetrical binuclear ruthenium(Ⅱ) complexes [Ru2:(bpy) 2Ru(DIPB)Ru(bpy) 2(ClO 4) 4 and Ru2_2H:(bpy) 2Ru(DIPB-2H)Ru(bpy) 2(ClO 4) 2 ]containing dinuclear ligand 2,2_bipyridine(bpy) and bridging ligand 1,4_di[2_imidazo[4,5_f][1,10] phenanthroine]benzene(DIPB) or 1,4_di[2_dehydrogen_imidazo[4,5_f][1,10] phenanthroine]benzene(DIPB_2H) on a platinum electrode have been investigated using cyclic voltammetry,cyclic ac voltammetry and differential capacitance techniques,etc.In acetonitrile solutions with a concentration of 0.1 mol/L TBAP,the central ruthenium ions in Ru2 and Ru2_2H complexes have shown a single 2e reversible oxidation_reduction wave on the cyclic voltammograms with basically the same formal potentials of Ru2_2H and Ru2 and a slightly larger apparent diffusion coefficient of the Ru2_2H complex cation than that of Ru2,i.e.,3.94×10 -6 cm 2/s and 3.50 ×10 -6 cm 2/s respectively.It appears that an enhanced electronic interaction exists between the two central ruthenium ions in the deprotonation of the bridging ligand(DIPB).

Key words: Binuclear ruthenium(Ⅱ) complex, Deprotonation, Electrochemical characteristics, Electronic interaction

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