Accession Number:

ADA090791

Title:

Photophysical Behavior of Polyatomic Molecules.

Descriptive Note:

Final rept. 1 Aug 72-31 Dec 79,

Corporate Author:

UNIVERSITY OF WESTERN ONTARIO LONDON DEPT OF CHEMISTRY

Personal Author(s):

• Ware,William R.

Report Date:

1980-10-01

Pagination or Media Count:

69.0

Abstract:

Part one of this report deals with attempts over the past several years to devise a more sophisticated theory of diffusion controlled reactions than that presented by Collins and Kimball. In particular, the investigators were interested in a more realistic formulation of the problem of high concentration quenching where quenches in the vicinity of the molecular to be quenched must be considered. It was desired however, to obtain a formalism which was tractable mathematically and which contained parameters which would be related to experiment. Part two deals with the photophysics of systems exhibiting molecular association both in the ground and excited states has been studied. The emphasis has been on kinetic models, the measurement of rate constants associated with these models, and the determination of activation parameters and equilibrium thermodynamic parameters associated with the exciplex formation and disappearance. Studies of solvent effects and steric effects on the behavior of exciplex systems have been carried out. The case of rapid equilibrium where the monomer and exciplex decay with the same rate constant has also been examined. Author

Descriptors:

• *FLUORESCENCE
• *REACTION KINETICS
• *POLYATOMIC MOLECULES
• *EXCITATION
• *QUENCHING(INHIBITION)
• MATHEMATICAL MODELS
• ACTIVATION
• QUENCHING
• SOLVENTS
• GROUND STATE
• DIFFUSION
• KINETICS
• MOLECULAR ASSOCIATION
• STEREOCHEMISTRY

Subject Categories:

• Quantum Theory and Relativity

Distribution Statement:

APPROVED FOR PUBLIC RELEASE