2,2'-联吡啶钯配合物的光谱性质与电化学行为

The Spectral Property and Electrochemical Behaviors of Palladium(Ⅱ) Complexes with 2,2'-Bipyridine

考察钯的两种联吡啶配合物:Pd(bpy)Cl2 (1)和Pd(bpy)2 (ClO4)2 (2 )的光谱、热谱和电化学行为,得出配合物 1不仅在负电势方向扫描时出现准可逆的氧化还原峰,而且在正电势方向扫描时也出现准可逆的氧化还原峰,对应在 350～ 4 50nm间出现较强MLCT吸收带;而配合物 2在 0～ 1.5V范围不出现氧化还原峰,对应 350～ 4 50nm间不出现较强MLCT吸收带.配合物中Pd～Cl伸缩频率为 354～ 343cm-1 ,Pd -N的伸缩频率为 4 4 5～ 4 55cm-1 之间。

The spectral and electrochemical behaviors of complexes, Pd(bpy)Cl2(1) and Pd(bpy)2(ClO4) 2(2), were studied by using CV, UV, IR and DTA etc. For the compelex 1, there CV couples were observed near 0.2450.294 and 0.848V vs Ag/AgCl electrode in CH3CN. The first two couples are correspond to two-electron metal ion redox process, the third is due to reduction of ligand. Whereas for the complex 2, only two cathodic peak, -0.322 and 1.064V, were observed. The Pd-Cl stretching freqencies were found near 343cm-1 in the complex 1, which is much smaller than the range 445-455cm-1, found for the Pd-N stretching vibrations.