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Redox processes in the solution of Ni(II) complex with salen type ligand and in the polymer films.

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Title: Redox processes in the solution of Ni(II) complex with salen type ligand and in the polymer films.
Authors: Tomczyk, Danuta1 tomczyk@chemia.uni.lodz.pl, Bukowski, Wiktor2, Bester, Karol2
Source: Electrochimica Acta. Mar2018, Vol. 267, p181-194. 14p.
Subjects: Polymer films, Nickel compounds, Electrolysis, Ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy
Abstract: The investigations of oxidation processes of (±)-trans-N,N′-bis(3,5-di-methylsalicylidene)-1,2-cyclohexanediaminenickel(II)) [Ni(salcn(2Me))] and ligands with Me substituents attached in o- (H2salcn(Me)) or o- and p-positions (H2salcn(2Me)) in CH2Cl2 were performed by CV, exhaustive electrolysis, UV VIS NIR and IR methods. H2salcn(Me) and H2salcn(2Me) are irreversibly oxidized to phenoxyl radicals and bis-phenoxyl radicals. The hydrogen bonds stabilize both forms of the oxidized ligands. [Ni(salcn(2Me))] is oxidized in three steps. The overall process involves ligand and partially nickel ion. In the I step, [Ni(salcn(2Me))] is oxidized to phenoxyl radical complex, which is well stabilized by the nickel ion. In the II step the oxidation is realized by forming bis-phenoxyl radicals and phenoxonium cations complexes. The films derived from salen complexes deposited on the Pt electrode surface ( poly [Ni(salcn)], poly [Ni(salcn(Me))], poly [Ni(salcn(Bu))]) were obtained as a result of anodic electropolymerization processes. On the basis of FTIR ATR spectroscopy and CV experiments, the relationship of the polymer films structures, charge transport and the potential range of the applied electrosynthesis was shown. [ABSTRACT FROM AUTHOR]
Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science 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.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 128278039
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  Label: Title
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  Data: Redox processes in the solution of Ni(II) complex with salen type ligand and in the polymer films.
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  Data: <searchLink fieldCode="AR" term="%22Tomczyk%2C+Danuta%22">Tomczyk, Danuta</searchLink><relatesTo>1</relatesTo><i> 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="%22Electrochimica+Acta%22">Electrochimica Acta</searchLink>. Mar2018, Vol. 267, p181-194. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Polymer+films%22">Polymer films</searchLink><br /><searchLink fieldCode="DE" term="%22Nickel+compounds%22">Nickel compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Electrolysis%22">Electrolysis</searchLink><br /><searchLink fieldCode="DE" term="%22Ultraviolet-visible+spectroscopy%22">Ultraviolet-visible spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Fourier+transform+infrared+spectroscopy%22">Fourier transform infrared spectroscopy</searchLink>
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  Data: The investigations of oxidation processes of (±)-trans-N,N′-bis(3,5-di-methylsalicylidene)-1,2-cyclohexanediaminenickel(II)) [Ni(salcn(2Me))] and ligands with Me substituents attached in o- (H2salcn(Me)) or o- and p-positions (H2salcn(2Me)) in CH2Cl2 were performed by CV, exhaustive electrolysis, UV VIS NIR and IR methods. H2salcn(Me) and H2salcn(2Me) are irreversibly oxidized to phenoxyl radicals and bis-phenoxyl radicals. The hydrogen bonds stabilize both forms of the oxidized ligands. [Ni(salcn(2Me))] is oxidized in three steps. The overall process involves ligand and partially nickel ion. In the I step, [Ni(salcn(2Me))] is oxidized to phenoxyl radical complex, which is well stabilized by the nickel ion. In the II step the oxidation is realized by forming bis-phenoxyl radicals and phenoxonium cations complexes. The films derived from salen complexes deposited on the Pt electrode surface ( poly [Ni(salcn)], poly [Ni(salcn(Me))], poly [Ni(salcn(Bu))]) were obtained as a result of anodic electropolymerization processes. On the basis of FTIR ATR spectroscopy and CV experiments, the relationship of the polymer films structures, charge transport and the potential range of the applied electrosynthesis was shown. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science 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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        Value: 10.1016/j.electacta.2018.02.051
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      – Code: eng
        Text: English
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        PageCount: 14
        StartPage: 181
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      – SubjectFull: Polymer films
        Type: general
      – SubjectFull: Nickel compounds
        Type: general
      – SubjectFull: Electrolysis
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      – SubjectFull: Ultraviolet-visible spectroscopy
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      – SubjectFull: Fourier transform infrared spectroscopy
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      – TitleFull: Redox processes in the solution of Ni(II) complex with salen type ligand and in the polymer films.
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              Text: Mar2018
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