AN FT-IR INVESTIGATION OF PARABACTIN ADSORBED ONTO ALUMINUM

A detailed FT-IR study has shown that the catecholate siderophore para bactin isolated from the bacterium Paracoccus denitrificans adsorbs fr om solution onto the oxide-covered aluminum surface. Comparision of th e FT-IR spectra for bulk parabactin and for parabactin adsorbed from s olution suggests that the parabactin molecule forms a complex with the aluminum oxide film through the -OH groups present in the aromatic ri ngs in parabactin and that the molecule adsorbs in a horizontal config uration on the oxide-covered aluminum surface.