Ground- and Excited-State Electronic Structure of an Emissive Pyrazine-Bridged Ruthenium(II) Dinuclear Complex
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- 作者：Wesley R. Browne ; Noel M. O'Boyle ; William Henry ; Adrian L. Guckian ; Sabine Horn ; Thomas Fett ; Christine M. O'Connor ; Marco Duati ; Luisa De Cola ; Colin. G. Coates ; Kate L. Ronayne ; John J. McGarvey ; a
- 刊名：Journal of the American Chemical Society
- 出版年：2005
- 出版时间：February 2, 2005
- 年：2005
- 卷：127
- 期：4
- 页码：1229 - 1241
- 全文大小：414K
- 年卷期：v.127,no.4(February 2, 2005)
- ISSN：1520-5126
文摘
The synthesis, characterization, and electrochemical, photophysical, and photochemical propertiesof the binuclear compounds [(Ru(H8-bpy)2)2((Metr)2Pz)](PF6)2 (1) and [(Ru(D8-bpy)2)2((Metr)2Pz)](PF6)2 (2),where bpy is 2,2'-bipyridine and H2(Metr)2Pz is the planar ligand 2,5-bis(5'-methyl-4'H-[1,2,4]triaz-3'-yl)pyrazine, are reported. Electrochemical and spectro-electrochemical investigations indicate that the ground-state interaction between each metal center is predominantly electrostatic and in the mixed-valence formonly a low level of ground-state delocalization is present. Resonance Raman, transient, and time-resolvedspectroscopies enable a detailed assignment to be made of the excited-state photophysical properties ofthe complexes. Deuteriation is employed to both facilitate spectroscopic characterization and investigatethe nature of the lowest excited states.