Room-temperature phosphorescence of 1-bromonaphthalene induced by straight-line alcohols in the presence of beta-cyclodextrin

Room-temperature phosphorescence of 1-bromonaphthalene (1-BrN) induced byaliphatic alcohols(A) was investigated in aqueous aerated g-cyclodextrin(P-CD) solution. Itfollows that 1-BrN phosphorescence intensity initially increases with the increasing numberof the carbon atoms in an alcohol. n-Pentanol exhibits the most pronounced phosphorescenceenhancement, and subsequently the phosphorescence intensity gradually decreases from n-hexanol to n-octanol. The stoichiometry and the equilibrium constants of a ternary complexwere determined. It has been found that the binding of 1-BrN to A: P-CD complex is a pre-dominant factor of phosphorescence enhancement. The effect of alcohols on RTP was ex-plained on the basis of the molecular size.