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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/3849

    Título
    Study of Adenine and Guanine Oxidation Mechanism by Surface-Enhanced Raman Spectroelectrochemistry
    Autor
    Ibáñez Martínez, DavidUBU authority Orcid
    Santidrian, Ana
    Heras Vidaurre, AránzazuUBU authority Orcid
    Kalbáč, Martin
    Colina Santamaría, ÁlvaroUBU authority Orcid
    Publicado en
    Journal of Physical chemistry C. 2015, V. 119, n. 15, p. 8191-8198
    Editorial
    American Chemical Society
    Fecha de publicación
    2015-03
    ISSN
    1932-7447
    DOI
    10.1021/acs.jpcc.5b00938
    Abstract
    Metal nanoparticles are systems largely employed in surface-enhanced Raman spectroscopy (SERS). In particular, gold nanoparticles are one of the best substrates used in this field. In this work, the optimal conditions for gold nanoparticles electrodeposition on single-walled carbon nanotubes electrodes have been established to obtain the best SERS response. Using this substrate and analyzing the changes of in situ Raman spectra obtained at different potentials, we have been able to explain simultaneously the oxidation mechanism of purine bases, differentiating the oxidation intermediates and their orientation during the different oxidation steps. Adenine orientation hardly changes during the whole oxidation; the molecule maintains a parallel configuration and only shows a slightly tilted orientation after the first oxidation step. On the other hand, guanine orientation changes completely during its oxidation. Initially, guanine is perpendicular respect to gold nanoparticles, changing its orientation after the first oxidation process when the molecule shows a slightly tilted orientation, and it finishes parallel respect to the electrode surface after the second oxidation step.
    Materia
    Química analítica
    Chemistry, Analytic
    URI
    http://hdl.handle.net/10259/3849
    Versión del editor
    http://dx.doi.org/10.1021/acs.jpcc.5b00938
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