Room temperature phosphorescence of 6-bromo-2-naphthol in micelles of poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) block copolymers and in their mixed aggregates with sodium dodecyl sulfate

Abstract

Room temperature phosphorescence (RTP) of 6-bromo-2-naphthol has been investigated in aqueous micellar solutions of poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) block copolymers as well as in their mixed aggregates with sodium dodecyl sulfate. RTP of the phosphorophor was enhanced to some extent in the micelles of the block copolymers. However, marked enhancement of RTP was observed in the mixed aggregates. The enhancement of RTP is attributed to effective incorporation of the phosphorophor into the micelles and the aggregates, resulting in suppression of nonradiative deactivation of the phosphorescent state.