A new 2-amino-3-pynanopyrane-3- carbonitrile derivative for electrocatalytic oxidation and determination of hydrazine.

A noble glassy carbon electrode modified with Au nanoparticles and 2-amino-4-(3,4-dihydroxyphenyl)-6-(hydroxymethyl)-8-oxo-4,8-dihydropyrano[3,2-b]pyran-3-carbonitrile, was fabricated for electrocatalytic determination of hydrazine (AuNPs/APP/GCE). Large over-potential and interference of some species are two limitation factors for the determination of hydrazine at bare electrode. This modified electrode is able to shift a signal to the negative potential, and can amplify the oxidation current of hydrazine by 28.0 time, compared to bare electrode. The diffusion coefficient, D, and the heterogeneous rate constant, k, for the oxidation of hydrazine at the modified surface were calculated by chronoamperometric studies. Finally, the fabricated sensor was agreeably utilized for the determination of hydrazine in real samples.