Selective molecular recognition of polycyclic aromatic hydrocarbons (PAHs) on calix[4]arene-functionalized Ag nanoparticles by surface-enhanced Raman scattering

Leyton, P.; Sanchez-Cortes, S; Garcia-Ramos, JV; Domingo C.; Campos-Vallette, M; Saitz C.; Clavijo, RE

Abstract

Trace concentrations of polycyclic aromatic hydrocarbons (PAHs) have been successfully detected using surface-enhanced Raman scattering (SERS) spectroscopy. For such purpose, new SERS substrates have been developed, consisting of Ag nanoparticles, either in suspension or immobilized on glass, obtained by a new method and covered by adsorbed self-assembled calix[4]arene molecules. Among the assayed calix[4]arenes, the 25,27-dicarboethoxy-26,28- dihydroxy-p-tert-butylcalix[4]arene host molecule displays analytical selectivity to the PAH guest systems bearing four benzene rings, mainly pyrene. The host - guest interaction mechanism seems to take place through a ?-? stacking interaction leading to a charge transfer between the complex and the metallic surface, which may also induce a notable influence on the surface charge of the metallic nanoparticle.

Más información

Título según WOS: Selective molecular recognition of polycyclic aromatic hydrocarbons (PAHs) on calix[4]arene-functionalized Ag nanoparticles by surface-enhanced Raman scattering
Título según SCOPUS: Selective molecular recognition of polycyclic aromatic hydrocarbons (PAHs) on Calix[4]arene-functionalized Ag nanoparticles by surface-enhanced raman scattering
Título de la Revista: JOURNAL OF PHYSICAL CHEMISTRY B
Volumen: 108
Número: 45
Editorial: AMER CHEMICAL SOC
Fecha de publicación: 2004
Página de inicio: 17484
Página final: 17490
Idioma: English
URL: http://pubs.acs.org/doi/abs/10.1021/jp047949i
DOI:

10.1021/jp047949i

Notas: ISI, SCOPUS