Ru(Ⅱ)和Ru(Ⅲ)配合物[Ru(bpy)(PH3)(-C≡CC6H4NO2-p)Cl]m(m=0,+1)的光谱性质的密度泛函-含时密度泛函理论研究 |
DFT and TDDFT Investigations on the Spectroscopic Properties of Ru(Ⅱ) and Ru(Ⅲ) Complexes: [Ru(bpy)(PH3)(-C≡CC6H4NO2-p)Cl]m(m=0,+1) |
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摘要: 我们利用DFT中的B3LYP方法优化了Ru(Ⅱ)配合物和氧化的Ru(Ⅲ)配合物[Ru(bpy)(PH3)(-C≡CC6H4NO2-p)Cl]m[bpy=2,2′-bipyridine;m=0 (1),+1 (1+)]的基态几何结构,得到的几何参数与实验结果吻合的很好。采用TDDFT方法,得到了配合物1和1+的激发态电子结构和电子吸收光谱。研究结果表明,配合物1和1+随着氧化过程的发生,光谱性质也发生变化,Ru(Ⅱ)配合物的低能吸收被指认为MLCT/LLCT混合跃迁,而氧化的Ru(Ⅲ)配合物1+的低能吸收具有LMCT跃迁性质。 |
关键词: 钌配合物 电荷转移 吸收光谱 密度泛函 含时密度泛函 |
基金项目: |
Abstract: The ruthenium(Ⅱ) and ruthenium (Ⅲ) complexes [Ru(bpy)(PH3)(-C≡CC6H4NO2-p)Cl]m [bpy=2,2′-bipyrid-ine; m=0(1),+1(1+)] are investigated theoretically to explore their electronic structures and spectroscopic propert-ies. The ground-state geometry structures of 1 and 1+ are optimized by the DFT method (B3LYP). The calculated geometry parameters are in agreement with experimental values. Absorption spectra for complexes 1 and 1+ are predicted at the TDDFT/B3LYP level. For complex 1, the low-energy absorptions have a mixed MLCT/LLCT character, whereas that of 1+ is LMCT nature. |
Keywords: ruthenium complexes charge transfer absorption spectra DFT TDDFT |
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李明霞,周 欣,张红星,付宏刚,孙家钟.Ru(Ⅱ)和Ru(Ⅲ)配合物[Ru(bpy)(PH3)(-C≡CC6H4NO2-p)Cl]m(m=0,+1)的光谱性质的密度泛函-含时密度泛函理论研究[J].无机化学学报,2007,23(10):1695-1699. |
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