Supramolecular inclusion complex formation and application of beta-cyclodextrin with heteroanthracene ring cationic dyes

beta-Cyclodextrin forms 1:1 inclusion complexes with methylene blue, azure A, toluidine blue, resorcinol blue, neutral red, safranine T, indigo carmin e and acridine orange in aqueous media. The formation constants are determi ned by differential pulse polarography and spectrophotometry. The supramole cular interaction in the inclusion complexes can be employed to immobilize dyes on an electrode. This gives high sensitivity and stable electrochemica l behavior for H2O2 detection at the mmol l(-1) level by means of the supra molecular interaction between beta-CD and dye molecules. (C) 1999 Elsevier Science B.V. AU rights reserved.