THEORETICAL STUDIES OF COMPLEXED TRANSITION METAL PHOTOTROPIC SYSTEMS.
Abstract
The purpose of this research was to study the mechanism of the light- or heat-induced darkening of polymer films containing high concentrations of CuBr2. The studies, mainly spectrophotometric, indicated that the darkening reaction is basically thermotropic, with the reaction in polymer films being essentially the same as in analogous solutions and depending on trapped solvent in the films. The important reactions are related to the equilibria between different CuBr2 complexes, with temperature change causing the large absorbance increase. Interactions between the Cu ions and color-intensifying organic functional groups on the resin appear to be solvation interactions rather than complex formation, so that by supplying these functional groups in the form of solvent, the system can be made relatively independent of resin type. At least part of the effect of H3PO4 appears to be a general acidity effect. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 18, 1965
- Accession Number
- AD0470074
Entities
People
- Jerome Goodman
- Joseph Steigman
- Sarah Mook