Anthracene was used to forman inclusion complex withmethylated-b-cyclodextrin (Me-b-CD) inwater. In aqueousMe-b-CD solution, typical ?uorescence emission of anthracene was observed. Benesi–Hildebrand’s method was used to obtain the stoichiometry of the anthracene–Me-b-CD complex. The Stern–Volmer quenching constants, Ksv, and ?uorescence quantum yields were calculated according to changes in the ?uorescence emission intensity of anthracene–Me-b-CD inclusion complexes by adding various amounts of Pb2þ
and Cd2þ salts inwater. The Ksv values and ?uorescence quantumyields indicate
that Pb2þ salts quench the anthracene–Me-b-CD inclusion complexes more ef?ciently than Cd2þ salts.