Intramolecular energy transfer in ruthenium(II)-chromium(III) chromophore-luminophore complexes. Ru(bpy) sub 2 (Cr(cyclam)(CN) sub 2 ) sub 2 sup 4+
Journal Article
·
· Inorganic Chemistry; (United States)
- Ferrara Univ. (Italy)
A new trinuclear Ru(II)-Cr(III) chromophore-luminophore complex, Ru(bpy){sub 2}(Cr(cyclam)(CN){sub 2}){sub 2}{sup 4+}, has been synthesized and characterized. Visible light absorption by the Ru(bpy){sub 2}{sup 2+} chromophore leads to emission from the Cr(cyclam)(CN){sub 2}{sup +} luminophore, as a consequence of very efficient ({ge} 99%) and fast (subnanosecond time scale) chromophore-luminophore exchange energy-transfer process. The emission is intense ({Phi} = 5.3 {times} 10{sup {minus}3} in H{sub 2}O) and long-lived ({tau} = 260 {mu}s in H{sub 2}O). The photophysical properties of the luminophore are slightly perturbed by interaction with the chromophore, resulting in a sharper emission band shape and shorter radiative and radiationless lifetimes. The presence of a Ru(II) {yields} Cr(III) intervalence transfer state, hardly detectable in the ground-state spectrum, is clearly revealed by the excited-state absorption spectrum of the chromophore-luminophore complex.
- OSTI ID:
- 7058911
- Journal Information:
- Inorganic Chemistry; (United States), Journal Name: Inorganic Chemistry; (United States) Vol. 31:2; ISSN 0020-1669; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500 -- Photochemistry
ABSORPTION SPECTRA
AMBIENT TEMPERATURE
AZINES
BIPYRIDINES
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMIUM COMPLEXES
COMPLEXES
CYANIDES
DECOMPOSITION
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
HETEROCYCLIC COMPOUNDS
INFRARED SPECTRA
KINETICS
LASER RADIATION
LIGANDS
MASS SPECTRA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PYRIDINES
RADIATIONS
REACTION KINETICS
RUTHENIUM COMPLEXES
SPECTRA
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
VOLTAMETRY
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500 -- Photochemistry
ABSORPTION SPECTRA
AMBIENT TEMPERATURE
AZINES
BIPYRIDINES
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMIUM COMPLEXES
COMPLEXES
CYANIDES
DECOMPOSITION
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
HETEROCYCLIC COMPOUNDS
INFRARED SPECTRA
KINETICS
LASER RADIATION
LIGANDS
MASS SPECTRA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PYRIDINES
RADIATIONS
REACTION KINETICS
RUTHENIUM COMPLEXES
SPECTRA
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
VOLTAMETRY