Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/4154
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Title

Detección de PAHs mediante espectroscopía SERS sobre superficies metálicas funcionalizadas con calixarenos

Other TitlesDetection of PAHs on calixarene-functionalized metal surfaces by means of SERS spectroscopy
AuthorsSánchez-Cortés, Santiago CSIC ORCID; Leyton, P.; Campos-Vallette, Marcelo; García-Ramos, José Vicente CSIC ORCID
KeywordsSERS
Calixareno
Funcionalización de Superficies
Hidrocarburos Policíclicos Aromáticos
Calixarenes
Surface Functionalization
PAHs
Issue Date2007
PublisherSociedad Española de Óptica
CitationOptica Pura y Aplicada 40 (2) 227-233 (2007)
Abstract[ES]Se han detectado trazas de hidrocarburos aromaticos policiclicos (PAHs) por espectroscopia SERS. Para conseguir este fin, se han desarrollado nuevos sustratos SERS formados por nanoparticulas de plata, tanto en suspension como inmovilizadas sobre vidrio. Estas nanoparticulas se cubrieron de moleculas de calix[4]arenos autoensambladas. Entre las moleculas de calixarenos ensayadas, el 25,27-dicarboethoxy-26,28-dihydroxy-p-tert-butylcalix[4]areno presenta una mayor selectividad analitica hacia los PAHs formados por cuatro anillos bencenicos, principalmente el pireno. El mecanismo de la interaccion entre el calixareno y el PAH parece tener lugar a traves de un empaquetamiento ƒÎ . ƒÎ que conduce a una transferencia de carga entre el complejo y la superficie metalica. Esta interccion puede inducir tambien cambios en la carga superficial de las nanoparticulas metalicas
[EN]Polycyclic Aromatic Hydrocarbons (PAHs) were detected at trace concentrations. In order to accomplish that, new SERS substrates were developed based on silver nanoparticles, both in suspension and immobilized in glass. These nanoparticles were covered by self-assembled calix[4]arene molecules. Among the assayed calixarene molecules, the 25,27-dicarboethoxy- 26,28-dihydroxy-p-tert-butylcalix[4]arene shows a higher analytical selectivity towards PAHs integrated by four benzene rings, mainly pyrene. The interaction mechanism between the calixarene and PAHs seems to take place through a ð–ð stacking leading to a charge-transfer between the complex and the metal surface. This interaction seems to also induce changes in the surface charge of the metallic particles
URIhttp://hdl.handle.net/10261/4154
ISSN0030-3917
Appears in Collections:(CFMAC-IEM) Artículos




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