Ground- and excited-state electronic structure of an emissive pyrazine-bridged ruthenium(II) dinuclear complex.
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.
Browne
Wesley R
WR
National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Dublin 9, Ireland.
O'Boyle
Noel M
NM
Henry
William
W
Guckian
Adrian L
AL
Horn
Sabine
S
Fett
Thomas
T
O'Connor
Christine M
CM
Duati
Marco
M
De Cola
Luisa
L
Coates
Colin G
CG
Ronayne
Kate L
KL
McGarvey
John J
JJ
Vos
Johannes G
JG