title: Ground- and excited-state electronic structure of an emissive pyrazine-bridged ruthenium(II) dinuclear complex.
abstract: The synthesis, characterization, and electrochemical, photophysical, and photochemical properties of 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 form only a low level of ground-state delocalization is present. Resonance Raman, transient, and time-resolved spectroscopies enable a detailed assignment to be made of the excited-state photophysical properties of the complexes. Deuteriation is employed to both facilitate spectroscopic characterization and investigate the nature of the lowest excited states.
authors.affiliation: National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Dublin 9, Ireland.
authors.forename: Wesley R
authors.initials: WR
authors.lastname: Browne
authors.forename: Noel M
authors.initials: NM
authors.lastname: O'Boyle
authors.forename: William
authors.initials: W
authors.lastname: Henry
authors.forename: Adrian L
authors.initials: AL
authors.lastname: Guckian
authors.forename: Sabine
authors.initials: S
authors.lastname: Horn
authors.forename: Thomas
authors.initials: T
authors.lastname: Fett
authors.forename: Christine M
authors.initials: CM
authors.lastname: O'Connor
authors.forename: Marco
authors.initials: M
authors.lastname: Duati
authors.forename: Luisa
authors.initials: L
authors.lastname: De Cola
authors.forename: Colin G
authors.initials: CG
authors.lastname: Coates
authors.forename: Kate L
authors.initials: KL
authors.lastname: Ronayne
authors.forename: John J
authors.initials: JJ
authors.lastname: McGarvey
authors.forename: Johannes G
authors.initials: JG
authors.lastname: Vos