Percorrer por autor "Christensen, Paul A."
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- New Insigths into the structure and properties of electroactive polymer filmes derived from Ni(salen)polymerPublication . Vilas-Boas, Miguel; Freire, Cristina; Castro, Baltazar de; Christensen, Paul A.; Hillman, A. RobertOxidative 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 polymerization and oxidative switching of the polymer were also assessed by ex situ EPR experiments.
- Spectroelectrochemical characterisation of a poly[Ni(saltMe)] modified electrodePublication . Vilas-Boas, Miguel; Freire, Cristina; Castro, Baltazar de; Christensen, Paul A.; Hillman, A. RobertElectrogenerated 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 abundant Ni and 61Ni-enriehed polymers.