Solid-matrix luminescence interactions and analytical aspects of phenylphenol isomers on filter paper
The solid-matrix luminescence limits of detection, percent relative standard deviation, and linear concentration ranges were obtained for model compounds adsorbed on four different solid-matrices. Filter paper showed the best analytical merit. Several solid-matrix luminescence properties of phenylphenol isomers adsorbed on Whatman filter paper were investigated. In the presence of sodium halide salts, the luminescence intensity, lifetime, quantum yield and modulus data were obtained to study heavy-atom effects, quenching effects by salts and moisture, and photophysical processes and molecular interactions in the solid-matrix. For 4-phenylphenol, 3-phenylphenol, and 2-phenylphenol, heavy-atom effects were observed for the room-temperature luminescence intensities. The room-temperature phosphorescence was sensitive to the structural differences among the isomers. The quenching of room-temperature fluorescence by halides was best described by a modified Perrin quenching model which considered a quenching sphere volume and residual fluorescence. At room temperature, the phosphorescence intensities were quenched by moisture while the phosphorescence lifetimes and fluorescence intensities were slightly affected by moisture for 4-phenylphenol and 2-phenylphenol with sodium halides. It was concluded that the adsorption of moisture on the filter paper matrix decreased the matrix rigidity, and thus the phosphorescence intensities of adsorbed phosphors were diminished. The phosphors were well-protected in the matrix, and water molecules could not diffuse effectively to the phosphor molecules. The photophysical data showed how the absorbed energy was channeled into the various radiative and nonradiative processes. Modulus experiments showed there were no differences in the Young's modulus values of filter paper containing NaCl, NaBr, or NaI. A correlation was found between Young's modulus and phosphorescence intensity as a function of the water content adsorbed on paper.
- Research Organization:
- Wyoming Univ., Laramie, WY (United States)
- OSTI ID:
- 5517631
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ADSORPTION
ALKALI METAL COMPOUNDS
AROMATICS
ARYL RADICALS
FILTERS
FLUORESCENCE
HALIDES
HALOGEN COMPOUNDS
HUMIDITY
HYDROXY COMPOUNDS
ISOMERS
LUMINESCENCE
MATRICES
MECHANICAL FILTERS
MECHANICAL PROPERTIES
MOISTURE
ORGANIC COMPOUNDS
PAPER
PHENOLS
PHENYL RADICALS
PHOSPHORESCENCE
PHOSPHORS
RADICALS
SALTS
SODIUM COMPOUNDS
SORPTION
TEMPERATURE DEPENDENCE
YOUNG MODULUS