skip to main content

Title: Magnetic resonance and optical spectroscopic studies of carotenoids

It is our goal to study the role of a host lattice in the formation of radicals and excited singlet and triplet states that are relevant to photosynthesis. Particular emphasis is being placed on determining what is special about carotenoids that natural photosynthetic systems require them as antennae as well as for protection. We are thus manipulating the host matrix so as to understand the carotenoid function (protection, quenching, energy transfer and antenna) and the structure of carotenoid cations. To characterize their properties, we have carried out EPR, ENDOR, optical, molecular orbital and electrochemical studies of carotenoids and carotenoid cations produced chemically, electrochemically, radiolytically (x-ray irradiated freon matrices) and photolytically (solution photolysis by excimer radiation) as a function of the host matrix. 36 refs.
Authors:
Publication Date:
OSTI Identifier:
5618929
Report Number(s):
DOE/ER/13465-6
ON: DE91014361
DOE Contract Number:
FG05-86ER13465
Resource Type:
Technical Report
Research Org:
Alabama Univ., University, AL (USA). Dept. of Chemistry
Sponsoring Org:
DOE; USDOE, Washington, DC (USA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CAROTENOIDS; OXIDATION; EXCITED STATES; TEMPERATURE DEPENDENCE; POLYMERS; ELECTRIC CONDUCTIVITY; RADICALS; CHEMICAL PREPARATION; ELECTROLYSIS; ELECTRON SPIN RESONANCE; ELECTRON TRANSFER; EXCIMER LASERS; MOLECULAR ORBITAL METHOD; NONLINEAR OPTICS; PHOTOLYSIS; PHOTOSYNTHESIS; PROGRESS REPORT; RADIOLYSIS; VOLTAMETRY; CHEMICAL RADIATION EFFECTS; CHEMICAL REACTIONS; CHEMISTRY; DECOMPOSITION; DOCUMENT TYPES; ELECTRICAL PROPERTIES; ENERGY LEVELS; GAS LASERS; HYDROCARBONS; LASERS; LYSIS; MAGNETIC RESONANCE; OPTICS; ORGANIC COMPOUNDS; PHOTOCHEMICAL REACTIONS; PHYSICAL PROPERTIES; PIGMENTS; RADIATION CHEMISTRY; RADIATION EFFECTS; RESONANCE; SYNTHESIS; TERPENES 400500* -- Photochemistry