Accession Number : ADA329694

Title :   A Novel Photochemical Interfacial Approach to the Degradation of Hazardous Materials

Descriptive Note : Final rept. 1 Jun 93-31 May 97

Corporate Author : COLUMBIA UNIV NEW YORK DEPT OF CHEMISTRY

Personal Author(s) : Turro, Nicholas J.

PDF Url : ADA329694

Report Date : 01 JUL 1997

Pagination or Media Count : 5

Abstract : Two studies are described. The first involved the use of time resolved electron spin resonance as a mechanistic and spectroscopic probe of two fundamental reactions of ketone photochemistry: intermolecular hydrogen abstraction by the triplet state of benzophenone and triplet state alpha-cleavage of 1,3-diphenylacetone (dibenzyl ketone). It was found that the forces restricting the ground state conformations of these ketones also restrict the triplet state conformations. The second study used steady-state spectroscopies and laser flash photolysis techniques to define the mechanism involved in biologically and medicinally related compounds employed as anticancer agents and a compound called A2-E, a bis-retinoid found inocular cells, believed to be associated with age-related macular degeneration.

Descriptors :   *DEGRADATION, *PHOTOCHEMICAL REACTIONS, *HAZARDOUS MATERIALS, SPECTROSCOPY, PHOTOLYSIS, INTERFACES, LASERS, ELECTRON SPIN RESONANCE, HYDROGEN, MOLECULE MOLECULE INTERACTIONS, METHYLENES, PHENYL RADICALS, KETONES, BENZOPHENONES.

Subject Categories : Organic Chemistry
      Radiation and Nuclear Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE