ROOM-TEMPERATURE LUMINESCENCE PROPERTIES OF BENZO[F]QUINOLINE AND PHENANTHRENE ADSORBED ON ALPHA-CYCLODEXTRIN-SODIUM CHLORIDE MIXTURES

The room-temperature fluorescence (RTF) and room-temperature phosphorescence (RTP) intensities of benzo[f]quinoline (B[f]Q) and phenanthrene were obtained from several .alpha.-cyclodextrin-sodium chloride mixtures. The results showed the importance of the initial wet chemistry in the sample preparation procedures for the observation of luminescence signal for compounds adsorbed on .alpha.-cyclodextrin-sodium chloride mixtures. The data indicated that in order to obtain the optimum RTP and RTF signals, the solvent used to adsorb the analytes had to be saturated with .alpha.-cyclodextrin. Also, the solid-surface fluorescence and phosphorescence quantum yield, triplet formation efficiency, and phosphorescence lifetime values were obtained for B[f]Q and phenanthrene adsorbed on 0.05% and 80% .alpha.-cyclodextrin-sodium chloride mixtures. From these data, rate constants for phosphorescence and for radiationless transition from the triplet state were obtained.