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Electrochemical Quartz Crystal Microbalance Study of the Behaviour of Bis(2,2--Bipyridyl)Copper(II) Complex Immobilized on a Self-Assembled Monolayer Modified Gold Electrode

Received: 25 September 2014     Accepted: 8 October 2014     Published: 30 October 2014
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Abstract

Modification of a gold electrode of an electrochemical quartz crystal microbalance (EQCM) has been achieved by immobilizing a bis(2,2--bipyridyl)copper(II) complex on a self-assembled monolayer (SAM) of 1-mercapto-11-undecanoic acid (MUA). The electrostatic interaction of the negatively charged SAM with a di-positive copper complex allowed the attachment. The modified electrode exhibited excellent redox behavior. Electro-statically immobilized on a SAM gold modified electrode is reported. A carboxylic acid terminated monolayer was utilized to provide a chemically uniform surface. The dependence of the modified electrode response was investigated in terms of pH, supporting electrolyte and ionic strength. X-ray photoelectron spectroscopy (XPS) was also employed to study the chemical interactions between bis(2,2--bipyridyl)copper(II) and 1-mercapto-11-undecanoic acid (MUA). XPS provides identification of the sorption sites involved in the accumulation of bis(2,2--bipyridyl)copper(II), as well as the forms of species sorbed on the self-assembled monolayer. It is found that sorption occurs on carboxlic functional groups.

Published in American Journal of Physical Chemistry (Volume 3, Issue 5)
DOI 10.11648/j.ajpc.20140305.13
Page(s) 67-71
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

Self-Assembled Monolayer, Quartz Crystal Microbalance, XPS, Adsorption, Modified Electrode

References
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    Abdunnaser Mohamed Etorki, Haddi Omar Reghei. (2014). Electrochemical Quartz Crystal Microbalance Study of the Behaviour of Bis(2,2--Bipyridyl)Copper(II) Complex Immobilized on a Self-Assembled Monolayer Modified Gold Electrode. American Journal of Physical Chemistry, 3(5), 67-71. https://doi.org/10.11648/j.ajpc.20140305.13

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    ACS Style

    Abdunnaser Mohamed Etorki; Haddi Omar Reghei. Electrochemical Quartz Crystal Microbalance Study of the Behaviour of Bis(2,2--Bipyridyl)Copper(II) Complex Immobilized on a Self-Assembled Monolayer Modified Gold Electrode. Am. J. Phys. Chem. 2014, 3(5), 67-71. doi: 10.11648/j.ajpc.20140305.13

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    AMA Style

    Abdunnaser Mohamed Etorki, Haddi Omar Reghei. Electrochemical Quartz Crystal Microbalance Study of the Behaviour of Bis(2,2--Bipyridyl)Copper(II) Complex Immobilized on a Self-Assembled Monolayer Modified Gold Electrode. Am J Phys Chem. 2014;3(5):67-71. doi: 10.11648/j.ajpc.20140305.13

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  • @article{10.11648/j.ajpc.20140305.13,
      author = {Abdunnaser Mohamed Etorki and Haddi Omar Reghei},
      title = {Electrochemical Quartz Crystal Microbalance Study of the Behaviour of Bis(2,2--Bipyridyl)Copper(II) Complex Immobilized on a Self-Assembled Monolayer Modified Gold Electrode},
      journal = {American Journal of Physical Chemistry},
      volume = {3},
      number = {5},
      pages = {67-71},
      doi = {10.11648/j.ajpc.20140305.13},
      url = {https://doi.org/10.11648/j.ajpc.20140305.13},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajpc.20140305.13},
      abstract = {Modification of a gold electrode of an electrochemical quartz crystal microbalance (EQCM) has been achieved by immobilizing a bis(2,2--bipyridyl)copper(II) complex on a self-assembled monolayer (SAM) of 1-mercapto-11-undecanoic acid (MUA). The electrostatic interaction of the negatively charged SAM with a di-positive copper complex allowed the attachment. The modified electrode exhibited excellent redox behavior. Electro-statically immobilized on a SAM gold modified electrode is reported. A carboxylic acid terminated monolayer was utilized to provide a chemically uniform surface. The dependence of the modified electrode response was investigated in terms of pH, supporting electrolyte and ionic strength. X-ray photoelectron spectroscopy (XPS) was also employed to study the chemical interactions between bis(2,2--bipyridyl)copper(II) and 1-mercapto-11-undecanoic acid (MUA). XPS provides identification of the sorption sites involved in the accumulation of bis(2,2--bipyridyl)copper(II), as well as the forms of species sorbed on the self-assembled monolayer. It is found that sorption occurs on carboxlic functional groups.},
     year = {2014}
    }
    

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  • TY  - JOUR
    T1  - Electrochemical Quartz Crystal Microbalance Study of the Behaviour of Bis(2,2--Bipyridyl)Copper(II) Complex Immobilized on a Self-Assembled Monolayer Modified Gold Electrode
    AU  - Abdunnaser Mohamed Etorki
    AU  - Haddi Omar Reghei
    Y1  - 2014/10/30
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    N1  - https://doi.org/10.11648/j.ajpc.20140305.13
    DO  - 10.11648/j.ajpc.20140305.13
    T2  - American Journal of Physical Chemistry
    JF  - American Journal of Physical Chemistry
    JO  - American Journal of Physical Chemistry
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    EP  - 71
    PB  - Science Publishing Group
    SN  - 2327-2449
    UR  - https://doi.org/10.11648/j.ajpc.20140305.13
    AB  - Modification of a gold electrode of an electrochemical quartz crystal microbalance (EQCM) has been achieved by immobilizing a bis(2,2--bipyridyl)copper(II) complex on a self-assembled monolayer (SAM) of 1-mercapto-11-undecanoic acid (MUA). The electrostatic interaction of the negatively charged SAM with a di-positive copper complex allowed the attachment. The modified electrode exhibited excellent redox behavior. Electro-statically immobilized on a SAM gold modified electrode is reported. A carboxylic acid terminated monolayer was utilized to provide a chemically uniform surface. The dependence of the modified electrode response was investigated in terms of pH, supporting electrolyte and ionic strength. X-ray photoelectron spectroscopy (XPS) was also employed to study the chemical interactions between bis(2,2--bipyridyl)copper(II) and 1-mercapto-11-undecanoic acid (MUA). XPS provides identification of the sorption sites involved in the accumulation of bis(2,2--bipyridyl)copper(II), as well as the forms of species sorbed on the self-assembled monolayer. It is found that sorption occurs on carboxlic functional groups.
    VL  - 3
    IS  - 5
    ER  - 

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Author Information
  • Department of Chemistry, University of Tripoli, Tripoli, Libya

  • Department of Chemistry, University of Tripoli, Tripoli, Libya

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