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A neutron reflectivity study of [Os(bipy)2(PVP)10Cl]+ polymer film modified electrodes: effect of redox state and counter ion

Identifieur interne : 00D436 ( Main/Merge ); précédent : 00D435; suivant : 00D437

A 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.

RBID : ISTEX:B230E935257F716377AA95E118DD935BDC3CE307

Descripteurs français

Wicri :
- topic : Polymère, Solvant.

English descriptors

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:

https://api.istex.fr/document/B230E935257F716377AA95E118DD935BDC3CE307/fulltext/pdf

DOI: 10.1016/S0013-4686(99)00113-9

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Le document en format XML

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<term>Cyclic voltammograms</term>
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<term>Overall electroneutrality</term>
<term>Oxidation state</term>
<term>Oxidation states</term>
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<term>Perchlorate solutions</term>
<term>Polymer</term>
<term>Polymer structure</term>
<term>Polymer volume fraction</term>
<term>Positive step</term>
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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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A neutron reflectivity study of [Os(bipy)2(PVP)10Cl]+ polymer film modified electrodes: effect of redox state and counter ion

A neutron reflectivity study of [Os(bipy)2(PVP)10Cl]+ polymer film modified electrodes: effect of redox state and counter ion

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

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