APPLICATION OF BIFUNCTIONAL REAGENTS FOR SELECTIVE IMMOBILIZATION OF AMINO AND THIOL COMPOUNDS ON A CARBON ELECTRODE SURFACE

A new kind of bifunctional reagent was used for carbon electrode modif ication: condensed aromatic rings were used as an anchor group for che misorption on the basal surface of the carbon electrode and chemically active functional groups were used to immobilize organic compounds vi a amino or thiol functional groups. Spontaneous and selective immobili zation of naphthoquinones with an -NH2 or -SH group at the end of the side-chain was achieved, and the monolayer of immobilized quinones sho wed a reversible electrochemical process. Application of this modified electrode for the immobilization of proteins (enzymes) via lysine or cysteine amino acid residuals is suggested.