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Kinetics of Redox Processes in the Polymer Films of Ni(II) Salen Type Complexes.

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Title: Kinetics of Redox Processes in the Polymer Films of Ni(II) Salen Type Complexes.
Authors: Tomczyk, Danuta1 danuta.tomczyk@chemia.uni.lodz.pl, Bukowski, Wiktor2, Bester, Karol2
Source: Journal of The Electrochemical Society. 2019, Vol. 166 Issue 6, pH194-H204. 11p.
Subjects: Conducting polymers, Polymer films, Oxidation-reduction reaction
Abstract: The voltammetry and chronocoulometry methods were used in the research of kinetics of redox processes occurring on electrodes modified with conductive polymers, derived from the following complexes: (±)-trans- N,N'-bis(salicylidene)- 1,2-cyclohexanediaminenickel(II) (poly[Ni(salcn)]), ((±)-trans-N,N'-bis(3,-methylsalicylidene)-1,2-cyclohexanediaminenickel(II) (poly[Ni(salcn(Me))]) and ((±)-trans-N,N'-bis(3,-tert-butylsalicylidene)-1,2-cyclohexanediaminenickel(II) (poly[Ni(salcn(Bu))]). Spectroelectrochemical method and chronopotentiometry were used to determine the mechanisms of redox processes. In poly[Ni(salcn)] and poly[Ni(salcn(Bu))] the ligand is oxidized, whereas in poly[Ni(salcn(Me))] both the ligand and the central ion are oxidized. The processes take place according to the EE mechanism. The poly[Ni(salcn)] and poly[Ni(salcn(Me))] films of thickness obtained as a result of 1-30 electropolymerization cycles, as well as poly[Ni(salcn(Bu))] of thickness obtained as a result of up to 150 cycles were studied. The investigated films of each complex are limited by surface processes, diffusion and surface-diffusion processes, depending on the film thickness. For the films that generate surface-diffusion processes, the boundaries of such processes have been determined. For the diffusion processes, the boundaries of semi-infinite diffusion regime and finite diffusion regime have been defined. On this basis, the cD1/2 value for anode and cathode processes providing semi-infinite diffusion conditions has been determined as a criterion for selection of the optimal conditions for modification of the electrodes. [ABSTRACT FROM AUTHOR]
Copyright of Journal of The Electrochemical Society is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
  Group: Ti
  Data: Kinetics of Redox Processes in the Polymer Films of Ni(II) Salen Type Complexes.
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  Data: <searchLink fieldCode="AR" term="%22Tomczyk%2C+Danuta%22">Tomczyk, Danuta</searchLink><relatesTo>1</relatesTo><i> danuta.tomczyk@chemia.uni.lodz.pl</i><br /><searchLink fieldCode="AR" term="%22Bukowski%2C+Wiktor%22">Bukowski, Wiktor</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Bester%2C+Karol%22">Bester, Karol</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+The+Electrochemical+Society%22">Journal of The Electrochemical Society</searchLink>. 2019, Vol. 166 Issue 6, pH194-H204. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Conducting+polymers%22">Conducting polymers</searchLink><br /><searchLink fieldCode="DE" term="%22Polymer+films%22">Polymer films</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation-reduction+reaction%22">Oxidation-reduction reaction</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The voltammetry and chronocoulometry methods were used in the research of kinetics of redox processes occurring on electrodes modified with conductive polymers, derived from the following complexes: (±)-trans- N,N'-bis(salicylidene)- 1,2-cyclohexanediaminenickel(II) (poly[Ni(salcn)]), ((±)-trans-N,N'-bis(3,-methylsalicylidene)-1,2-cyclohexanediaminenickel(II) (poly[Ni(salcn(Me))]) and ((±)-trans-N,N'-bis(3,-tert-butylsalicylidene)-1,2-cyclohexanediaminenickel(II) (poly[Ni(salcn(Bu))]). Spectroelectrochemical method and chronopotentiometry were used to determine the mechanisms of redox processes. In poly[Ni(salcn)] and poly[Ni(salcn(Bu))] the ligand is oxidized, whereas in poly[Ni(salcn(Me))] both the ligand and the central ion are oxidized. The processes take place according to the EE mechanism. The poly[Ni(salcn)] and poly[Ni(salcn(Me))] films of thickness obtained as a result of 1-30 electropolymerization cycles, as well as poly[Ni(salcn(Bu))] of thickness obtained as a result of up to 150 cycles were studied. The investigated films of each complex are limited by surface processes, diffusion and surface-diffusion processes, depending on the film thickness. For the films that generate surface-diffusion processes, the boundaries of such processes have been determined. For the diffusion processes, the boundaries of semi-infinite diffusion regime and finite diffusion regime have been defined. On this basis, the cD1/2 value for anode and cathode processes providing semi-infinite diffusion conditions has been determined as a criterion for selection of the optimal conditions for modification of the electrodes. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of The Electrochemical Society is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1149/2.0961906jes
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 11
        StartPage: H194
    Subjects:
      – SubjectFull: Conducting polymers
        Type: general
      – SubjectFull: Polymer films
        Type: general
      – SubjectFull: Oxidation-reduction reaction
        Type: general
    Titles:
      – TitleFull: Kinetics of Redox Processes in the Polymer Films of Ni(II) Salen Type Complexes.
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            NameFull: Tomczyk, Danuta
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            NameFull: Bukowski, Wiktor
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            NameFull: Bester, Karol
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            – D: 01
              M: 04
              Text: 2019
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              Value: 166
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