Study of room-temperature phosphorescence of 1-bromonaphthalene in sodium dodecylbenzene sulfonate and beta-cyclodextrin solution

Intense room-temperature phosphorescence (RTP) of 1-bromo-naphthalene (1-BrN) was studied in aerated aqueous solutions containing sodium dodecylbenzene sulfonate (SDBS) and beta-cyclodextrin (beta-CD). It has been found that considerably enhanced RTP arises from the formation of the 1:1:1/SDBS:1-BrN:beta-CD ternary inclusion complex in premicellar solutions. The spectral and structural analyses of molecules indicate that the phenyl ring of SDBS is included in the apolar cavity of beta-CD and the polar head group and a part of hydrocarbon chain located outside the cavity. Surface tension of the solutions demonstrates that the presence of micelles results in serious phosphorescence quenching. (C) 1997 Elsevier Science B.V.