Resonance Raman spectra and excitation profiles of tris(.alpha.-diimine) complexes of iron(II)

Vibrational spectra of specifically deuteriated 2,2′‐bipyridine complexes of Fe(II), Ru(II) and Os(II)

“…In both Ru(bpy-d8)32+ and Fe(bpy-d8)32+, this mode shifts by 31-33 cm-', comparable to the shift observed in the IR for the 1595 cm-' band of Pd(bpy)C12 on perdeuteriation (30 ~m -' ) .~~ A similar ring stretching mode occurs in the free ligand at 1 5 9 6~m -' , '~,~~ but its shift on perdeuteriation is unknown. In the case of pyridine (py), this mode shifts 30 cm-' on perdeuteriation, from 1580 to 1550 ~m-'.~' For the Ru(I1) complexes, the intensity deuterium shifts observed in py-3,5-d2 (Ad = 5 cm-')26 and py-2,6-d2 (Ad = 12 cm-1)25 are comparable to those observed in the bpy-3,3'-d2 and bpy-6,6'-d2 ruthenium ( 11) complexes.…”

Resonance Raman spectrum of [Ru(bipyridine)3]2+ in water, acetonitrile and their deuterated derivatives: the possible role of solvent in excited‐state charge localization

“…Figure 2 shows the resonance Raman spectrum of [Ru(bpy) 3 of 457.9 nm. As summarized in Table 1 21 Taking the error in the depolarization ratio to be about š10%, there is no significant effect of solvent isotopic substitution on the observed values. For the most part, there is no dramatic change in on going from water to acetonitrile.…”

Understanding excited-state structure in metal polypyridyl complexes using resonance Raman excitation profiles, time-resolved resonance Raman spectroscopy and density functional theory

“…One of the early examples of using resonance Raman spectroscopy to analyse electronic transitions is a study of tris(␣-diimine)iron(II) complexes including [Fe(bpy) 3 ] 2+ and [Fe(phen) 3 ] 2+ (phen = 1,10-phenanthroline; for ligands see Fig. 8) [66]. These studies demonstrated that the electronic spectra of these complexes in the visible region show a single MLCT transition with a vibronic sideband.…”