Intramolecular Proton Reactions in the Excited State: The Photochemistry of Heterocyclic Schiff Bases.
Abstract
The photochemistry and spectra of a number of heterocyclic Schiff bases have been investigated in the crystalline state (polycrystalline powders and thin films), in rigid glasses and in solution, in a variety of solvents over a range of temperatures and solute concentrations. All the compounds studied in the crystalline state are found to be thermochromic; a number of them present the phenomenon of negative thermochromism. All these compounds are photo-colourable (photochromic) in rigid glasses at low temperatures. Photochromism, in this class of compounds, is a property of the isolated molecule in an arbitrary rigid matrix involving proton transfer leading to quinoid type molecules. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1975
- Accession Number
- ADA013507
Entities
People
- Dina Gegiou-hadjoudis
- Eugene Hadjoudis