ANALYTICAL AND MECHANISTIC ASPECTS OF THE ROOM-TEMPERATURE PHOSPHORESCENCE OF ERYTHROSINE-B ADSORBED ON SOLID SUPPORTS AS OXYGEN SENSING PHASES

Room temperature phosphorescence (RTP) lifetime measurements and spect ra of different concentrations of Erythrosine B immobilized on anion e xchangers and non-ionic resins have been employed to unveil mechanisti c aspects of the RTP of immobilized Erythrosine B. The existence of a definite number of RTP decaying components in some experimental condit ions has been confirmed. The effects of humidified argon and air on RT P lifetimes and the changes in luminescence intensities were used to i nvestigate some of the interactions responsible for the multiple compo nent RTP emission. The experiments performed also proved the suitabili ty of the phases prepared using non-ionic resins, for the quantificati on of molecular oxygen by RTP-quenching measurements. Moreover, the so lid phases with anion-exchanger resins showed good potential for the a nalytical sensing of humidity.