Resonance Raman and time-resolved resonance Raman evidence for enhanced localization in the [sup 3]MLCT states of ruthenium(II) complexes with the inherently asymmetric ligand 2-(2-pyridyl)pyrazine

Journal Article · Wed Sep 22 04:00:00 EDT 1993 · Journal of the American Chemical Society; (United States)

DOI:https://doi.org/10.1021/ja00072a018· OSTI ID:5147425

Danzer, G D; Golus, J A; Kincaid, J R ^[1]

---

1. Marquette Univ., Milwaukee, WI (United States)

The resonance Raman (RR) and time-resolved resonance Raman (TR[sup 3]) spectra of ruthenium(II) complexes containing the inherently asymmetric 2-(2-pyridyl)pyrazine (pypz) and its selectively deuteriated analogue are reported. The spectrum of the ground-state species is interpretable in terms of vibrationally isolated fragments with the exception of several modes which involve the interring and adjacent bonds. More importantly, the TR[sup 3] spectra of the (triplet) metal-to-ligand-charge-transfer state are shown to be consistent with the presence of a coordinated pypz in which the electronic charge is polarized toward the pyrazine fragment. A detailed discussion of the spectral analysis which leads to this conclusion is provided, and the potential implication of the effect for the design of practical devices is discussed. 19 refs., 4 figs., 1 tab.

• OSTI ID: 5147425
• Journal Information: Journal of the American Chemical Society; (United States), Journal Name: Journal of the American Chemical Society; (United States) Vol. 115:19; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140500 -- Solar Energy Conversion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AZINES
COMPLEXES
CONVERSION
ELECTRONIC STRUCTURE
ENERGY CONVERSION
HETEROCYCLIC COMPOUNDS
LIGANDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PYRAZINES
PYRIDYL RADICALS
RADICALS
RAMAN SPECTRA
RESOLUTION
RESONANCE
RUTHENIUM COMPLEXES
SOLAR ENERGY CONVERSION
SPECTRA
TIME RESOLUTION
TIMING PROPERTIES
TRANSITION ELEMENT COMPLEXES