Model systems for chlorophyll photochemistry: retention of fluorescence at high chlorophyll density at a hydrophobic-hydrophilic interface

Technical Report · Fri Jan 01 04:00:00 EST 1982

OSTI ID:6733558

Seely, G R; Senthilathipan, V

Many model systems containing chlorophyll show concentration quenching of fluorescence at quite moderate occupancies of the available phase space. A new kind of model system has been introduced, involving adsorption of chlorophyll and certain other amphiphilic substances to particles of polyethylene swollen with hydrocarbons, in which fluorescence is retained at coverages approaching a monolayer. In the example illustrated, the fluorescence lifetime is undiminished in spite of evidence for the prescence of associated chlorophyll species along with the monomer. The preservation of fluorescence is probably owing to a combination of high viscosity in the swollen polyethylene phase and the presence of a surfactant to keep the chlorophyll in monomeric and well-defined associated forms.

• Research Organization: Charles F. Kettering Research Lab., Yellow Springs, OH (USA)
• DOE Contract Number: AC02-82ER12039
• OSTI ID: 6733558
• Report Number(s): DOE/ER/12039-T4; ON: DE83000350
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
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Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ADSORPTION
BIOMIMETIC PROCESSES
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
CHEMISTRY
CHLOROPHYLL
FLUORESCENCE
FUNCTIONAL MODELS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
LUMINESCENCE
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
PHOTOCHEMICAL REACTIONS
PHOTOCHEMISTRY
PHOTOSYNTHESIS
PHYTOCHROMES
PIGMENTS
POLYETHYLENES
POLYMERS
POLYOLEFINS
PORPHYRINS
SORPTION
SURFACTANTS
SYNTHESIS