Room-temperature luminescence properties of p-aminobenzoic acid and 4-phenylphenol adsorbed on. cap alpha. -cyclodextrin/NaCl mixtures
The solid-surface fluorescence and phosphorescence quantum yield values and phosphorescence lifetime values were obtained for p-aminobenzoic acid (PABA) and 4-phenylphenol adsorbed on ..cap alpha..-cyclodexrin/NaCl mixtures. From the luminescence quantum yield and phosphorescence lifetime data, the triplet formation efficiency values, the phosphorescence rate constants, and the rate constants for radiationless transition from the triplet state were determined for PABA and 4-phenylphenol on ..cap alpha..-cyclodexctrin/NaCl mixtures. In addition, the percentages of radiative and nonradiative transitions were calculated for the two compounds. The various luminescence parameters obtained in this work provided important insights into the analyte/..cap alpha..-cyclodextrin substrate interactions responsible for the observed solid-surface room-temperature fluorescence (RTF) and phosphorescence (RTP). Furthermore, the RTF and RTP intensities of PABA and 4-phenylphenol were obtained from several ..cap alpha..-cyclodextrin/NaCl mixtures. The data showed the importance of the initial wet chemistry in the sample preparation procedure.
- Research Organization:
- Chemistry Department, University of Wyoming, Laramie, Wyoming 82071
- OSTI ID:
- 6950118
- Journal Information:
- Appl. Spectrosc.; (United States), Journal Name: Appl. Spectrosc.; (United States) Vol. 42:4; ISSN APSPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400500* -- Photochemistry
ALKALI METAL COMPOUNDS
AMINO ACIDS
AROMATICS
CARBOHYDRATES
CARBOXYLIC ACIDS
CHLORIDES
CHLORINE COMPOUNDS
DE-EXCITATION
DEXTRIN
DISPERSIONS
EFFICIENCY
EMISSION SPECTROSCOPY
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
FLUORESCENCE SPECTROSCOPY
HALIDES
HALOGEN COMPOUNDS
HYDROXY COMPOUNDS
LUMINESCENCE
MEDIUM TEMPERATURE
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
PABA
PHENOLS
PHOSPHORESCENCE
POLYSACCHARIDES
QUANTUM EFFICIENCY
RADIATIONLESS DECAY
SACCHARIDES
SODIUM CHLORIDES
SODIUM COMPOUNDS
SPECTROSCOPY
SUBSTRATES