A supramolecular compound with the formula (C₁₀H₁₈N)₆As₂Mo₁₈O₆₂·6CH₂CN·8H₂O has been synthesized by the reaction of Dawson type molybdoarsenate acid and amantadine, and characterized by elemental analysis, IR and 1H NMR.The results of X-ray diffraction indicated that amantadine and polyanion were linked together through electrostatic interactions and intermolecular forces (hydrogen bonding).Moreover, amantadine and polyanion preserved their original framework in this new compound.The title compound has a reversible photochromic property.A possible photochromic mechanism was proposed based on the ESR spectra of colour-changed samples.The bulk-modified carbon paste electrode (APM-CPE) using this compound as modifier shows a good electrocatalytic activity toward the reduction of peroxide.

Key words: amantadine, Dawson type polyoxometalate, X0ray crystal structure, photochromism, electrocatalytic activity