Preparation and electrochemical behavior of water-soluble inclusion complex of ferrocene with β-cyclodextrin polymer

► Water-soluble Fc-β-CD polymer inclusion complex is prepared with a supermolecular method. ► Fc-β-CDP shows better aqueous solubility remarkably than Fc and Fc-β-CD. ► It also reserves the electrochemical properties of Fc-β-CDP in aqueous solution. ► It is determined the electrochemical constants and dissociated constant. ► The method opens up aqueous applications of insoluble organic compounds in electrochemistry.