SERS and theoretical studies of arginine

A E Aliaga; C Garrido; P Leyton; G Diaz; J S Gomez-Jeria; T Aguayo; E Clavijo; M M Campos-Vallette; S Sanchez-Cortes

doi:10.1016/j.saa.2010.01.007

SERS and theoretical studies of arginine

Spectrochim Acta A Mol Biomol Spectrosc. 2010 Sep 1;76(5):458-63. doi: 10.1016/j.saa.2010.01.007. Epub 2010 Feb 4.

Authors

A E Aliaga¹, C Garrido, P Leyton, G Diaz, J S Gomez-Jeria, T Aguayo, E Clavijo, M M Campos-Vallette, S Sanchez-Cortes

Affiliation

¹ Laboratorio de Espectroscopia Vibracional, Universidad de Chile, PO Box 653, Las Palmeras 3425, Santiago, Chile.

PMID: 20471905
DOI: 10.1016/j.saa.2010.01.007

Abstract

Arginine amino acid (Arg) has been vibrationally studied through its infrared, Raman and surface-enhanced Raman scattering (SERS) spectra, and theoretical calculations. Net charge is used to predict the possibility to obtain the SERS spectrum of Arg in colloidal solution. The interpretation of the SERS spectral data suggests that the Arg-Ag nanoparticles interaction in a colloidal solution and in the case of the Arg coated by Ag is mainly verified through the guanidinium moiety. Theoretical calculations performed by using extended Hückel theory method for a model of Arg interacting with an Ag cluster support the observed SERS experimental result.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Arginine / chemistry*
Metal Nanoparticles / chemistry
Models, Molecular
Models, Theoretical
Molecular Structure
Silver / chemistry
Spectrum Analysis, Raman / methods*

Substances

Silver
Arginine