Supramolecular inclusion complex formation and application of β-cyclodextrin with heteroanthracene ring cationic dyes Original Research Article

β-Cyclodextrin forms 1:1 inclusion complexes with methylene blue, azure A, toluidine blue, resorcinol blue, neutral red, safranine T, indigo carmine and acridine orange in aqueous media. The formation constants are determined by differential pulse polarography and spectrophotometry. The supramolecular interaction in the inclusion complexes can be employed to immobilize dyes on an electrode. This gives high sensitivity and stable electrochemical behavior for H2O2 detection at the mmol l−1 level by means of the supramolecular interaction between β-CD and dye molecules.