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Solid-surface luminescence analysis [electronic resource]

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Bibliographic Details
Online Access:	Online Access
Corporate Authors:	University of Wyoming. Department of Chemistry (Researcher), United States. Department of Energy. Chicago Operations Office (Researcher)
Format:	Government Document Electronic eBook
Language:	English
Published:	Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Defense ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1991.
Subjects:	Silica. Acetates. Organic Compounds. Silicon Oxides. Document Types. Phosphorescence. Energy-level Transitions. Separation Processes. Oxide Minerals. Moisture. Oxygen Compounds. Minerals. Progress Report. Liquid Column Chromatography. Fluorescence. Carbohydrates. Quenching. Carboxylic Acid Salts. Silicon Compounds. Chromatography. Polysaccharides. Paper. Saccharides. Dextrin. Oxides. Luminescence. Chalcogenides. Inorganic, Organic, Physical And Analytical Chemistry.

Description
Abstract:	We have characterized several interactions that are very important in solid-matrix luminescence. With silica gel chromatoplates and filter paper, simple equations were derived for calculating the individual contributions to the percent decrease in luminescence due to either moisture or to a quenching gas. For sodium acetate as a solid matrix and p-aminobenzoate as a model compound, it was concluded that p-aminobenzoate was incorporated into the crystal structure of sodium acetate, and the triplet energy was lost be skeletal vibrations in sodium acetate. Also, with the same system is was shown that p-aminobenzoate did not undergo rotational relaxation, and thus rotational processes did not contribute to the deactivation of the triplet state. Several results were obtained from model compounds adsorbed on filter paper under different temperature and humidity conditions and with a variety of heavy atoms present. Fundamental photophysical equations were used in calculating several basic parameters that revealed information on rate processes and how the absorbed energy was distributed in an adsorbed lumiphor. The most important advancement with filter paper was the development of equations that relate phosphorescence parameters of adsorbed phosphors to the Young's modulus of filter paper. These equations are based on a fundamental theory that relates the hydrogen-bonding network of paper to the modulus of paper.
Item Description:	Published through the Information Bridge: DOE Scientific and Technical Information. 01/01/1991. "doe/er/13547-3" "DE92007740" Hurtubise, R.J.
Physical Description:	Pages: (13 p) : digital, PDF file.