2026-04-28T19:53:09Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/38492021-11-10T09:38:17Zcom_10259_3844com_10259_5086com_10259_2604col_10259_3845
Ibáñez Martínez, David
290
500
Santidrian, Ana
bbb94135-a70f-448d-94ca-aa188357a1f4
500
Heras, Aránzazu
273
500
Kalbáč, Martin
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Colina, Álvaro
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2015-09-29T08:31:57Z
2016-04-01T02:45:06Z
2015-03
1932-7447
http://hdl.handle.net/10259/3849
10.1021/acs.jpcc.5b00938
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.
Junta de Castilla y Leon (GR71, BU349-U13) and Ministerio de Economia y Competitividad (CTQ2010-17127) is gratefully acknowledged. D.I. thanks Ministerio de Economia y Competitividad for his predoctoral FPI fellowship. A.S. and M.K. acknowledge the support from MSMT ERC-CZ project: LL1301.
This document is the Accepted Manuscript version of a Published Work that appeared in final form in
Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher
application/pdf
eng
American Chemical Society
Journal of Physical chemistry C. 2015, V. 119, n. 15, p. 8191-8198
http://dx.doi.org/10.1021/acs.jpcc.5b00938
info:eu-repo/grantAgreement/JCyL/BU349-U13
info:eu-repo/grantAgreement/JCyL/GR71
info:eu-repo/grantAgreement/MINECO/CTQ2010-17127
Química analítica
Chemistry, Analytic
Study of Adenine and Guanine Oxidation Mechanism by Surface-Enhanced Raman Spectroelectrochemistry
info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
info:eu-repo/semantics/openAccess
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oai:riubu.ubu.es:10259/3849
2021-11-10 10:38:17.783
Repositorio Institucional de la Universidad de Burgos
bubrep@ubu.es
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