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).