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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/21092

    Título
    Improvement of electrocatalytic effect in voltammetric sensors based on phthalocyanines
    Autor
    Rodríguez Méndez, María LuzAutoridad UVA Orcid
    Medina Plaza, CristinaAutoridad UVA
    García Hernández, CeliaAutoridad UVA
    Rodríguez, Silvia
    García Cabezón, Ana CristinaAutoridad UVA Orcid
    Paniagua Albillos, David
    Rodríguez Pérez, Miguel ÁngelAutoridad UVA Orcid
    Saja Saez, José Antonio DeAutoridad UVA Orcid
    Año del Documento
    2016
    Editorial
    World Scientific
    Descripción
    Producción Científica
    Documento Fuente
    Journal of Porphyrins and Phthalocyanines, Enero 2016, vol. 20, p. 1-8
    Abstract
    Voltammetric sensors based on phthalocyanines have been used to detect a variety of compounds. In this paper, the state of the art of sensors prepared using classical techniques will be revised. Then, new strategies to improve the performance of the sensors will be described using as example sensors chemically modified with lutetium bisphthalocyanine (LuPc2) dedicated to the detection of phenols of interest in the food industry. Classical LuPc2 carbon paste electrodes can detect phenols such as catechol, caffeic acid or pyrogallol with limits of detection in the range of 10-4–10-5 M. The performance can be improved by using nanostructured Langmuir–Blodgett (LB) or Layer by Layer (LbL) films. The enhanced surface to volume ratio produce an increase in the sensitivity of the sensors. Limits of detection of 10-5–10-7 M are attained, which are one order of magnitude lower than those obtained using conventional carbon paste electrodes. Moreover, these techniques can be used to coimmobilize two electrocatalytic materials in the same device. The limits of detection obtained in LB sensors combining LuPc2/AuNPs or LuPc2/CNT are further improved. Finally, the LB technique has been used to prepare biosensors where a phenol oxydase (such as tyrosinase or lacasse) is immobilized in a biomimetic environment that preserves the enzymatic activity. Moreover, LuPc2 can be co-immobilized with the enzyme in a lipidc film formed by arachidic acid (AA). LuPc2 can act as an electron mediator facilitating the electron transfer. These biomimetic sensors formed by LuPc2/AA/enzyme show Limits of detection of 10-8 M and an enhanced selectivity.
    Materias (normalizadas)
    Voltammetric sensors
    Phthalocyanine
    Bisphthalocyanine
    Phenols
    Nanoparticles
    Biosensors
    ISSN
    1088-4246
    Revisión por pares
    SI
    DOI
    10.1142/S1088424616500218
    Patrocinador
    CM-P agradece a la Universidad de Valladolid por su beca PIF-UVa y CG-H por su contrato pre-doctoral JCYL (BOCYL-D-24112015-9).
    Ministerio de Economía, Industria y Competitividad – FEDER (Grant CICYT AGL2012-33535)
    Junta de Castilla y León (programa de apoyo a proyectos de investigación - Ref. VA-032U13)
    Version del Editor
    http://www.worldscientific.com/doi/abs/10.1142/S1088424616500218
    Propietario de los Derechos
    World Scientific
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/21092
    Derechos
    openAccess
    Collections
    • BioEcoUVa - Artículos de revista [195]
    • DEP63 - Artículos de revista [322]
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    Universidad de Valladolid

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