Solid-surface luminescence analysis
Several fundamental luminescence parameters were calculated for model compounds on {beta}-cyclodextrin/salt mixtures. A number of correlations were developed for the interactions of the model compounds with the {beta}-CD matrices. With model compounds adsorbed on filter paper, several basic equations were developed that relate radiative and nonradiative rate constants to activation energies. These equations will be important in defining specific processes that occur in filter paper. The modulus of filter paper has been related to various luminescence processes of the adsorbed compounds. Also, it has been possible to develop linear equations that relate the modulus of filter paper to the phosphorescence lifetimes of the adsorbed compounds. As reported previously, {beta}-cyclodextrin ({beta}-CD)/salt mixtures are excellent solid matrices for obtaining room-temperature fluorescence (RTF) and room-temperature phosphorescence (RTP) from adsorbed compounds. By using benzo(f)quinoline (B(f)Q) and 4-phenylphenol (4-PP) as model compounds adsorbed in {beta}-CD/salt mixtures, fluorescence and phosphorescence quantum yields, fluorescence and phosphorescence polarization values, and phosphorescence lifetimes were obtained as a function of temperature from 296 K to 93 K. As mentioned in the last progress report, it is possible to relate the heat capacity of sodium acetate to the nonradiative rate constant of the triplet state of the adsorbed anion of p-aminobenzoic acid. From the RTF lifetimes of B(f)Q and 4-PP adsorbed on filter paper and earlier luminescence data, several photophysical parameters were calculated. In addition, a number of equations that relate radiative and nonradiative rate constants to preexponential factors and activation energy terms were considered.
- Research Organization:
- Wyoming Univ., Laramie, WY (USA). Dept. of Chemistry
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- FG02-86ER13547
- OSTI ID:
- 5936866
- Report Number(s):
- DOE/ER/13547-2; ON: DE91010000
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360603 -- Materials-- Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACETATES
ACTIVATION ENERGY
ADSORPTION
ALKALI METAL COMPOUNDS
AROMATICS
AZAARENES
AZINES
CARBOHYDRATES
CARBOXYLIC ACID SALTS
DEXTRIN
DOCUMENT TYPES
ENERGY
FLUORESCENCE
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
LUMINESCENCE
MECHANICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PAPER
PHENOLS
PHOSPHORESCENCE
PHOSPHORS
POLARIZATION
POLYSACCHARIDES
PROGRESS REPORT
PYRIDINES
QUINOLINES
SACCHARIDES
SODIUM COMPOUNDS
SORPTION
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
YOUNG MODULUS