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Proceedings Paper

Some Studies In Solid Matrices And Facile Micellar Luminescence
Author(s): Syang Y Su; William J Long; Andrae K Spencer; Tae J Chung
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Paper Abstract

A study was performed to show the effect of heavy atoms, matrices and a filler on the solid matrix room temperature luminescence of fluorescamine derivatized amino acids and drugs. Fluorescamine derivatized p-aminobenzoic acid (PABA), phenylpropanolamine hydrochloride (PPA) and alanine were used as model compounds for this study. Heavy atom species exhibited the following descending _order _of luminescence enhancement for the fluorescamine derivatized products: I > Br > Cl . The derivatized PABA showed more enhancement from heavy atoms than derivatized PPA or alanine. Derivatized PPA and alanine experienced equivalent heavy atom enhancement. Quenching was observed when AgNO, was used as the heavy atom for the phosphorescence measurement of fluorescamine derivatized products. Filler effects were observed by the addition of sodium acetate (NaAc) onto the solid matrices. Luminescence signals increased with increasing concentration of the filler. Matrices were observed to enhance the luminescence signal in the descending order of DE-81 > S&S 903 > P-81. It was found that the pH of a facile micellar solution enhanced the phosphorescence signal and decreased the rise time of a phosphor, such as biphenyl, naphthalene and pyrene. Attempts were being made to study the pH effect on the luminescence of aromatic acids. Compounds, 1- and 2-naphthoic acids were used for such a study. The effect of changes in pH of water and 0.05 M SLS solutions on fluorescence characteristics has been obtained for both acids. A weak phosphorescence signal of 2-naphthoic acid has been observed under certain conditions which needs further study. The pH of the solution, nonetheless, was found to drastically affect the fluorescence of 2-naphthoic acid.

Paper Details

Date Published: 27 April 1988
PDF: 6 pages
Proc. SPIE 0910, Fluorescence Detection II, (27 April 1988); doi: 10.1117/12.945447
Show Author Affiliations
Syang Y Su, Virginia Commonwealth University (United States)
William J Long, Virginia Commonwealth University (United States)
Andrae K Spencer, Virginia Commonwealth University (United States)
Tae J Chung, Virginia Commonwealth University (United States)

Published in SPIE Proceedings Vol. 0910:
Fluorescence Detection II
E. Roland Menzel, Editor(s)

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