Quenching of excited tris(2,2'-bipyridine)ruthenium(II) by metal 1,2-dithiolene complexes
Journal Article
·
· J. Phys. Chem.; (United States)
The quenching of excited Ru(bpy)/sub 3//sup 2 +/ by MS/sub 4/C/sub 4/(C/sub 6/H/sub 5/)/sub 4/ and MS/sub 4/C/sub 4/(CN)/sub 4//sup 2 -/ (M = Ni, Pt) has been studied in CH/sub 3/CN and DMF. The dynamic quenching rate constants, which are nearly diffusion controlled, have been analyzed in terms of diffusional parameters and unimolecular quenching constants. The unimolecular quenching constants for the MS/sub 4/C/sub 4/(CN)/sub 4//sup 2 -/ quenchers are lower by 2 orders of magnitude than those for the MS/sub 4/C/sub 4/(C/sub 6/H/sub 5/)/sub 4/ quenchers, and this effect has been attributed to a different degree of adiabaticity. The quenching mechanism has been investigated by using sacrificial scavengers for oxidized or reduced (Ru(bpy)/sub 3//sup 2 +/. Evidence for oxidative quenching by the MS/sub 4/C/sub 4/(C/sub 6/H/sub 5/)/sub 4/ complexes was obtained. For the MS/sub 4/C/sub 4/(CN)/sub 4//sup 2 -/ quenchers, either energy transfer or reductive electron transfer followed by very efficient cage recombination is a possible quenching mechanism. 48 references, 4 figures, 2 tables.
- Research Organization:
- Universita and Centro di Fotochimica C.N.R., Ferrara, Italy
- OSTI ID:
- 5598538
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:10; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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OSTI ID:5992571
Surfactant tris(2,2'-bipyridine)ruthenium(II) derivatives in aqueous micellar solutions. Absorption and emission spectroscopy and luminescence quenching
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Journal Article
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Mon Jul 01 00:00:00 EDT 1985
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·
OSTI ID:5492672
Related Subjects
14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
AZINES
BIPYRIDINES
COMPLEXES
DATA
DE-EXCITATION
DIFFUSION
ELECTRON TRANSFER
ENERGY LEVELS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PYRIDINES
RADIATIONLESS DECAY
RUTHENIUM COMPLEXES
TRANSITION ELEMENT COMPLEXES
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
AZINES
BIPYRIDINES
COMPLEXES
DATA
DE-EXCITATION
DIFFUSION
ELECTRON TRANSFER
ENERGY LEVELS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PYRIDINES
RADIATIONLESS DECAY
RUTHENIUM COMPLEXES
TRANSITION ELEMENT COMPLEXES