Luminescence of ruthenium(II) and osmium(II) polypyridyls in acetonitrile at high pressures
Description
The spectra, quantum yield, and lifetime of excited Ru(II) and Os(II) tris(bipyridine) and tris(phenanthroline) complexes have been studied in acetonitrile as a function of pressure (0.1-300 MPa) and temperature (2-700C). The radiative and nonradiative transition rates between the luminescent CT level and the ground states are generally increased by 5-10% at pressures of 300 MPa. A pressure effect of greater magnitude and opposite direction is observed for the luminescence lifetime tau of Ru(II) complexes, because a third CT → LF nonradiative decay channel is thermally accessible and made inaccessible by pressure. The measurement of activation volumes for tau at different temperatures gives ΔV = 11.5 mL/mol for the CT → LF deactivation path of Ru(bpy)3Cl2 in CH3CN. 34 references, 5 figures, 8 tables
Additional details
Publishing Information
- Journal Title
- J. Phys. Chem.
- Journal Volume
- 89
- Journal Issue
- 15
- Series
- J. Phys. Chem.
- Journal Page Range
- 3320-3323
- ISSN
- 0022-3654
- CODEN
- JPCHA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 17027196
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ACETONITRILE; BIPYRIDINES; EMISSION SPECTRA; EXCITED STATES; EXPERIMENTAL DATA; LIFETIME; LIGANDS; LUMINESCENCE; OSMIUM; PHENANTHROLINES; PRESSURE DEPENDENCE; QUANTUM EFFICIENCY; RADIATIONLESS DECAY; RUTHENIUM; TEMPERATURE DEPENDENCE
- Descriptors DEC
- AZINES; DATA; DE-EXCITATION; EFFICIENCY; ELEMENTS; EMISSION; ENERGY LEVELS; ENERGY TRANSFER; ENERGY-LEVEL TRANSITIONS; HETEROCYCLIC COMPOUNDS; INFORMATION; METALS; NITRILES; NUMERICAL DATA; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; PHOTON EMISSION; PLATINUM METALS; PYRIDINES; SPECTRA; TRANSITION ELEMENTS