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Electrochemical behaviour of a new percursor for the design of Poly[Ni(saltMe)]...
Vilas-Boas, Miguel; Santos, I.C.; Henderson, M.J.; Freire, C.; Hillman, A.R.; Vieil, E.Wedescribe the potentiodynamic preparation and subsequent characterization of poly[Ni(3-MeOsaltMe)] films (surface concentration, 3 < ¡/nmol cm-2 < 350) in acetonitrile media. Coulometric and gravimetric (electrochemical quartz crystal microbalance, EQCM) data allow one to monitor the deposition process and show that the resultant films are physically and chemically stable.
Oxidation of ferrocene derivatives at a Poly[Ni(saltMe)] modified electrode
Vilas-Boas, Miguel; Pereira, E.M.; Freire, C.; Hillman, A.R.The characterization of film permeability and mediation properties of poly[Ni(saltMe)] modified electrodes were evaluated by studying the oxidation of ferrocene and 1,1’-dimethylferrocene at these electrodes by rotating-disk voltammetry. The effects of varying the substrate and its solution concentration, film thickness, rotation speed and electrode potential on the limiting current density were analysed using ...
Spectroelectrochemical characterisation of a poly[Ni(saltMe)] modified electrode
Vilas-Boas, Miguel; Freire, C.; Castro, B.; Christensen, P.A.; Hillman, A.R.Electrogenerated polymers based on the nickel(II) compIex 2,3-dimetbyl- N,N -bis(salicylidene )butane-2,3- diaminatoniekel(II), poly[Ni(saltMe)], were characterized by in situ FTIR and UV/Vis spectroscopy and ex-situ EPR spectroscopy in order to gain insights into film structure, electronic states and charge conduction. The role of the nickel ions during film oxidation was probed by using EPR to study naturally...
A combined electrochemical quartz-crystal microbalance probe beam deflection (E...
Vilas-Boas, Miguel; Henderson, M.J.; Freire, C.; Hillman, A.R.; Vieil, E.The oxidative polymerization of the complex2,3-dimelhyl-N,N-bis( salicylidene)butane-2,3-diaminatonickel( n), [Ni(saltMe)], was monitored by the electrochemical quartz microbalance (EQCM) and crystal impedance techniques. Polymerisation efficiency was maintained throughout deposition of a film, which behaved rigidly, on the electrode.
Electrochemical characterization of a novel salen type modified electrode
Vilas-Boas, Miguel; Freire, C.; Castro, B.; Hillman, A.R.The nickel(II) complex with H2saltMe, a N2O2 Schiff base ligand derived from salicylaldehyde, was oxidatively electropolymerized on Pt electrodes in CH3CN/0.1 mol dm-3 tetraethylammonium perchlorate (TEAP) to generate polymer films that exhibit reversible oxidative electrochemical behavior in a wide potential range (0.0-1.3 V), high conductivity, and stability/durability.
New Insigths into the structure and properties of electroactive polymer filmes ...
Vilas-Boas, Miguel; Freire, C.; Castro, B.; Christensen, P.A.; Hillman, A.R.Oxidative electrochemical polymerization of (N,N'-ethylenebis(salicylideneaminato)) nickel(II), [Ni(salen)], in acetonitrile/TEAP was reinvestigated. The polymers were characterized by in situ FTIR and UV-visible spectroscopies in order to explore film structure and to clarify the electronic states as a function of the electrochemically controlled applied redox potential; oxidized species involved in polymeriza...
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