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多吡啶钌乙炔配合物[(tpy)(bpy)RuC≡CC_6H_4R]^+[R=Cl,H,OMe]的电子结构和光谱性质的理论研究

Theoretical studies of electronic structures and spectroscopic properties of [(tpy)(bpy)RuC≡CC_6H_4R]^+[R=Cl,H,OMe]
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摘要 利用B3LYP方法优化了多吡啶钌乙炔配合物[(tpy)(bpy)RuC≡CC6H4R]+[tpy=2,2′:6′,2"-terpyridine,bpy=2,2′-bipyridine;R=Cl(1),H(2),OMe(3)]的基态几何结构,得到的几何参数与实验结果吻合。利用SCRF方法中的CPCM模型来模拟溶剂化效应,采用TDDFT(Time-Dependent Density Functional Theory)方法计算得到了配合物在CH3CN溶液中的激发态电子结构和电子吸收光谱。研究结果表明,配合物1~3溶液吸收光谱的跃迁性质相似,其中低能吸收均被指认为MLCT和LLCT混合激发跃迁。 A series of polypyridine ruthenium (Ⅱ) acetylide complexes, [ (tpy) (bpy) RuC - CC6H4R] ^+ ( tpy'= 2, 2' :6',2″ - terpyridine, bpy =2,2' - bipyridine; R = Cl ( 1 ), H (2) and OMe (3)) are investigated theoretically to explore their electronic structures and spectroscopic properties. The ground - state geometry structures of complexes 1 -3 are optimized by the DFT method (B3LYP). The calculated geometry parameters are in agreement with experimental values available. Absorption spectra for complexes 1 - 3 in CH3CN solution are predicted at the TD-DFT/B3LYP level. The solvent effects are seriously considered using the conductor- like polarizable continuum model (CPCM). For complexes 1 - 3, in CH3CN solution, the low - energy absorptions have a mixed LMCT/ LLCT character.
出处 《黑龙江大学自然科学学报》 CAS 北大核心 2008年第3期312-315,319,共5页 Journal of Natural Science of Heilongjiang University
基金 国家自然科学基金资助项目(20703015) 黑龙江省自然科学基金资助项目(B200601)
关键词 多吡啶钌乙炔配合物 吸收光谱 密度泛函 含时密度泛函 polypyfidine ruthenium (Ⅱ) acetylide complexes absorption spectra DFT TDDFT
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参考文献11

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