Selective Molecular Recognition of Polycyclic Aromatic Hydrocarbons (PAHs) on Calix[4]arene-Functionalized Ag Nanoparticles by Surface-Enhanced Raman Scattering

Autor:	Santiago Sánchez-Cortés, P. Leyton, R. E. Clavijo, José Vicente García-Ramos, C. Saitz, M. Campos-Vallette, Concepción Domingo
Rok vydání:	2004
Předmět:	Chemistry Stacking Nanoparticle Photochemistry Surfaces Coatings and Films chemistry.chemical_compound Adsorption Molecular recognition Materials Chemistry Molecule Pyrene Surface charge Physical and Theoretical Chemistry Benzene
Zdroj:	JOURNAL OF PHYSICAL CHEMISTRY B Artículos CONICYT CONICYT Chile instacron:CONICYT
ISSN:	1520-5207 1520-6106
DOI:	10.1021/jp047949i
Popis:	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 π−π 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb433dfb665f6b92d6d35d35699979bd https://doi.org/10.1021/jp047949i Zobrazit plný text záznamu