Abstract
Abstract Metal ion mediated self-assembly of the ditopic ligand 1,4-bis(2,2′:6′,2′′-terpyridine-4′-yl)benzene and Co(II) results in a metallo-supramolecular coordination polyelectrolyte (Co-MEPE), which is analyzed by spectroscopic methods, elemental analysis and cyclovoltammetry. The Co-MEPE shows a reversible one-electron redox transition in the potential range from −0.15 to 0.35 V with a half-wave potential of 87 mV. Thin films of Co-MEPE are fabricated by layer-by-layer self-assembly together with poly(styrenesulfonate) (PSS) on planar substrates and are analyzed by UV/vis spectroscopy, microgravimetry, and electrochemistry. The Co-ions in the multilayer can be removed and displaced by Fe-ions. The electrochemical activity of the Co-ions is fully maintained in the films. Charge transport through the multilayer is consistent with electron self-exchange reactions. The permeability of the multilayers is investigated by electrochemistry using K3[Fe(CN)6] as electroactive probe. Compared to poly(allylamine hydrochloride) (PAH)/PSS films, the electroactive probe does not permeate through PSS/Co-MEPE multilayers. Fluorescence measurements with pyrene as polarity probe indicate that the Co-MEPE films are more hydrophobic than PAH/PSS multilayers.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call