Sulfide accumulation and sensing based on electrochemical processes in microdroplets of N1-[4-(dihexylamino)phenyl]-N1,N4,N4-trihexyl-1,4-phenylenediamine

Abstract

Electroanalytical sulfide detection via oxidation of N¹-[4-(dihexylamino)phenyl]-N¹,N⁴,N⁴-trihexyl-1,4-phenylene diamine (DPTPD) deposited in form of microdroplets onto basal plane pyrolytic graphite electrodes immersed in aqueous 0.1 M NaClO₄ containing sulfide is proposed to be associated with two consecutive reversible one electron processes accompanied by ClO₄^– uptake, sulfide accumulation, and formation of a methylene blue derivative.