Mechanism of the cooperative vibronic emission of /sup 1/. delta. /sub g/ singlet oxygen in solutions

Journal Article · Sat Mar 01 04:00:00 EST 1986 · Theor. Exp. Chem. (Engl. Transl.); (United States)

OSTI ID:6057232

Minaev, B F

The mechanism for inducing the probability of the ..cap alpha.. /sup 1/..delta../sub g/-X /sup 3/..sigma../sub g//sup -/ transition in an oxygen molecule with the simultaneous excitation of a vibration state of the solvent has been considered. The intensification of the O-O band of this transition under the influence of the solvent is attributed to the induction of the electric dipole moment of the b/sup 1/..sigma../sub g//sup +/-..cap alpha.. /sup 1/..delta../sub g/ (m/sub ba/) transition during a collision between O/sub 2/ and solvent molecules. It has been shown that m/sub ba/ is strongly dependent on the intermolecular distance and, consequently, on the normal coordinate of the vibrations of the solvent (Q) at a given collision parameter. Calculation of the derivative deltam/sub ba//deltaQ (with consideration of the strong spin-orbit coupling of the b /sup 1/..sigma../sub g//sup +/ and X /sup 3/..sigma../sub g//sup -/ states) makes it possible to account for the intensity of the new luminescence band of /sup 1/..delta../sub g/ singlet oxygen, which is shifted toward longer wavelengths relative to the O-O band of the ..cap alpha.. /sup 1/..delta../sub g/-X /sup 3/..sigma../sub g//sup -/ by the value of the vibrational quantum of the solvent.

• Research Organization: Karagand Univ., USSR
• OSTI ID: 6057232
• Journal Information: Theor. Exp. Chem. (Engl. Transl.); (United States), Journal Name: Theor. Exp. Chem. (Engl. Transl.); (United States) Vol. 21:5; ISSN TEXCA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ATOMIC MODELS
COLLISIONS
COMPUTER CODES
COMPUTERIZED SIMULATION
COUPLING
DIPOLE MOMENTS
DISTANCE
ELECTRIC DIPOLE MOMENTS
ELECTRIC MOMENTS
ELEMENTS
EMISSION SPECTRA
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FUNCTIONS
HALOGENATED ALIPHATIC HYDROCARBONS
INTERATOMIC DISTANCES
INTERMEDIATE COUPLING
L-S COUPLING
LUMINESCENCE
M CODES
MATHEMATICAL MODELS
MECHANICS
MOLECULE COLLISIONS
MOLECULE-MOLECULE COLLISIONS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC SOLVENTS
OSCILLATOR STRENGTHS
OXYGEN
PERTURBATION THEORY
PHOTOLUMINESCENCE
QUANTUM MECHANICS
SIMULATION
SOLVENTS
SPECTRA
VIBRATIONAL STATES
WAVE FUNCTIONS