TY  - JOUR
AU  - Zinola, C.F.
AU  - Rodríguez, J.L.
AU  - Arévalo, M.C.
AU  - Pastor, E.
T1  - FTIR studies of tyrosine oxidation at polycrystalline Pt and Pt(1 1 1) electrodes
LA  - eng
PY  - 2005
SP  - 230
EP  - 239
T2  - Journal of Electroanalytical Chemistry
SN  - 1572-6657
VL  - 585
IS  - 2
PB  - Elsevier
AB  - The electrochemical oxidation of tyrosine has been studied on polycrystalline and (1 1 1) single crystal platinum electrodes in 0.1 M HClO4. No surface sensitivity of bulk tyrosine reactions has been detected for these two electrodes, although the adsorption process seems to be structure-sensitive. The onset for tyrosine electrooxidation is observed at ca. 0.7 V for both surfaces. In situ FTIR technique was used to discern the nature of the products formed during the oxidation processes. The early stages of tyrosine oxidation occur via a decarboxylation to carbon dioxide. Two complex parallel reactions were found at E > 1.10 V vs. RHE: one of them leading to a γ-lactone of hydroxy-substituted benzofurane, and the second with the formation of p-benzoquinone. The assignment of these products is based on the corresponding transmission spectra. © 2005 Elsevier B.V. All rights reserved.
DO  - 10.1016/j.jelechem.2005.08.014
UR  - https://portalciencia.ull.es/documentos/5e3add5e299952629a024f14
DP  - Dialnet - Portal de la Investigación
ER  -