TIME-RESOLVED PHOSPHORESCENCE SPECTROMETRY WITH A SILICON INTENSIFIED TARGET VIDICON AND REGRESSION-ANALYSIS METHODS

This paper describes the development of a silicon intensified target vidicon camera system for phosphorescence studies and describes applications to room-temperature phosphorescence of salts of organic acids deposited on filter paper. The instrument permits time resolved spectra to be recorded with a minimum scan time of 8 ms/scan. Spectral decay data are processed by a variety of regression methods to obtain rate constants, lifetimes, and initial intensity. The methods include provision for multiple data rates, multiwavelength data for each component, and for an internal standard procedure that reduces effects of experimental variables. The internal-standard method reduces overall imprecision by factors of 2 to 5 depending upon the component. Results are reported for one-, two-, and three-component mixtures of 1-naphthoic acid, 2-naphthoic acid, 4-biphenylcarboxylic acid, 2-naphthol-6,8-disulfonic acid, and p-aminobenzoic acid. © 1979, American Chemical Society. All rights reserved.