Estados superficiales nanocluster-adsorbato.
2004; Volume: 37; Issue: 2 Linguagem: Espanhol
ISSN
2171-8814
AutoresIsabel López‐Tocón, Juan Soto Martín, Desiree Fernandez, Silvia P. Centeno, Juan C. Otero,
Tópico(s)Water Quality Monitoring and Analysis
ResumoespanolLos espectros SERS de pirazina registrados en electrodo de Ag han sido analizados de acuerdo al mecanismo de transferencia de carga (CT) considerando el sistema metal-adsorbato. Las propiedades de los estados electronicos superficiales de este sistema determinan las caracteristicas observadas en SERS. Para identificar los estados CT mediante calculos ab initio se propone el modelo teorico Ag2-pirazina. Se comprueba que los estados CT son similares a los del radical anion de la molecula aislada. Palabras clave: SERS, Mecanismo de transferencia de carga, Pirazina EnglishThe SERS spectra of pyrazine have been recorded on silver electrode and analyzed according to the charge transfer (CT) mechanism considering the metal-adsorbate system. The properties of the charge transfer electronic states of this system determine the SERS experimental behaviour. A theoretical model Ag2-pyrazine has been employed in order to identify the CT states from ab initio calculations. It is shown that the CT states are similar to those of the radical anion of isolated molecule.
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