Films of poly(4-azulen-1-yl-2,6-bis(2-thienyl)pyridine) for heavy metal ions complexation

► Electrochemical characterization of 4-azulen-1-yl-2,6-bis(2-thienyl)pyridine (L). ► Preparation of complexing polymer-coated electrodes by electropolymerization. ► Electrochemical and scanning electron microscopy of modified electrodes. ► Investigation of complexing properties of L and polyL towards heavy metals. ► Complexation of lead and cadmium metal cations inside the polymer film.