THE KINETICS OF EXCIMER FORMATION IN FLUID MEDIA.
Abstract
The ratio of molecular to excimer fluorescence intensities has been measured as a function of temperature for concentrated solutions of 2-methylnaphthalene, 1-fluoronaphthalene, acenaphthene and 1,2-benzanthracene in low-viscosity solvents. Values of 5-6 kcal/mole obtained for the heats of photoassociation are significantly lower than that of 11 kcal/mole found for pyrene, and indicate that the repulsion energy between unexcited molecules in the excimer configuration is largely responsible for the red-shift of some 6000cm-1 to the-1 power of the excimer band with respect to the molecular spectrum. The corresponding entropies of photoassociation are estimated to lie within the range of -20 to -28 e.u.. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 30, 1963
- Accession Number
- AD0430510
Entities
People
- Brian Stevens
- Michael S. Walker
- Miklos I. Ban
Organizations
- University of Sheffield