A neutron reflectivity study of [Os(bipy)2(PVP)10Cl]+ polymer film modified electrodes: effect of redox state and counter ion
Identifieur interne : 00C463 ( Main/Exploration ); précédent : 00C462; suivant : 00C464A neutron reflectivity study of [Os(bipy)2(PVP)10Cl]+ polymer film modified electrodes: effect of redox state and counter ion
Auteurs : Robert W. Wilson [France] ; Robert Cubitt [France] ; Andrew Glidle [Royaume-Uni] ; A. Robert Hillman [Royaume-Uni] ; Paul M. Saville [Australie] ; Johannes G. Vos [Irlande (pays)]Source :
- Electrochimica Acta [ 0013-4686 ] ; 1999.
Descripteurs français
- Pascal (Inist)
- Complexe chloro, Coordinat organique, Copolymère organométallique, Degré oxydation, Effet milieu, Electrode, Etude expérimentale, Gonflement, Ion antagoniste, Matériau modifié, Monocristal, Or, Osmium Complexe, Perchlorate, Polymère redox, Polyélectrolyte, Pyridine dérivé copolymère, Pyridine(4-vinyl)copolymère, Réflexion neutron, Tosylate.
- Wicri :
English descriptors
- KwdEn :
- Acmw, Acta, Anion, Chem, Chloro complex, Counter ion, Counter ions, Critical edge, Cyclic, Cyclic voltammograms, Cycling, Electrochemical, Electrochemical responses, Electrochimica, Electrochimica acta, Electrode, Electrodes, Electrolyte, Elsevier science, Experimental study, Gold, Gold layer, Interface, Interference fringes, Length densities, Length density, Medium effect, Modified material, Neutron, Neutron data, Neutron experiment, Neutron reflection, Nmol, Open circuit, Organic ligand, Organometallic copolymer, Osmium Complexes, Outer layer, Overall electroneutrality, Oxidation number, Oxidation state, Oxidation states, Oxidized, Oxidized state, Perchlorate, Perchlorate media, Perchlorate solution, Perchlorate solutions, Perchlorates, Polyelectrolyte, Polymer, Polymer structure, Polymer volume fraction, Positive step, Ptsa, Pyridine derivative copolymer, Pyridine(4-vinyl) copolymer, Qcmw, Quartz, Redox, Redox cycling, Redox polymer, Redox state, Single crystal, Solution contrasts, Solvent, Solvent content, Solvent penetration, Spatial distribution, Surface coverage, Swelling.
- Teeft :
- Acmw, Acta, Anion, Chem, Counter ions, Critical edge, Cyclic, Cyclic voltammograms, Cycling, Electrochemical, Electrochemical responses, Electrochimica, Electrochimica acta, Electrode, Electrolyte, Elsevier science, Gold layer, Interface, Interference fringes, Length densities, Length density, Neutron, Neutron data, Neutron experiment, Nmol, Open circuit, Outer layer, Overall electroneutrality, Oxidation state, Oxidation states, Oxidized, Oxidized state, Perchlorate, Perchlorate media, Perchlorate solution, Perchlorate solutions, Polymer, Polymer structure, Polymer volume fraction, Positive step, Ptsa, Qcmw, Quartz, Redox, Redox cycling, Redox state, Solution contrasts, Solvent, Solvent content, Solvent penetration, Spatial distribution, Surface coverage.
Abstract
Abstract: The effects of redox state (Os[II] vs. Os[III]) and counter ion (perchlorate vs. p-toluenesulphonate) on the polymer and solvent density distributions in films of electroactive [Os(bipy)2(PVP)10Cl]+ were determined using neutron reflectivity. The changes in polymer structure upon immersion in solvent and upon redox cycling the film in these electrolytes were also investigated. The as-prepared dry polymer film swelled appreciably upon immersion in aqueous solutions. Using p-toluenesulphonate as the counter ion caused pronounced changes to film structure upon both redox cycling and holding it in a fixed oxidation state; the perchlorate anion was found to be much less disruptive. Surprisingly, the effect on film structure of changing anion was much more pronounced than the effect of changing film redox state, i.e. charge density.
Url:
DOI: 10.1016/S0013-4686(99)00113-9
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="en">Abstract: The effects of redox state (Os[II] vs. Os[III]) and counter ion (perchlorate vs. p-toluenesulphonate) on the polymer and solvent density distributions in films of electroactive [Os(bipy)2(PVP)10Cl]+ were determined using neutron reflectivity. The changes in polymer structure upon immersion in solvent and upon redox cycling the film in these electrolytes were also investigated. The as-prepared dry polymer film swelled appreciably upon immersion in aqueous solutions. Using p-toluenesulphonate as the counter ion caused pronounced changes to film structure upon both redox cycling and holding it in a fixed oxidation state; the perchlorate anion was found to be much less disruptive. Surprisingly, the effect on film structure of changing anion was much more pronounced than the effect of changing film redox state, i.e. charge density.</div>
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