Raman and surface enhanced Raman scattering (SERS) spectroscopies were used to study the pH effect (7 to 9) on the interaction of arginine (Arg) with colloidal Ag nanoparticles (AgNps). A new methodology was implemented in order to obtain reproducible SERS spectra in solution. The dependence of the Arg concentration on the stability of the AgNps is discussed. A pH increasing of the colloidal solution to the limits of the Arg pKa(2) value induces a preferential and stable Arg-metal interaction. potential measurements of the Arg-AgNps system at different pH conditions studied provide information about the Arg-AgNps interaction; the pH increasing favors the interaction. SERS spectra at pH 7 indicate that the molecule interacts with the Ag surface only through the guanidinium fragment. By increasing the pH to 9, the molecule adopts a new conformation on the surface; the metal-analyte interaction is verified through the guanidinium, carboxylate and the aliphatic moieties. In addition, theoretical calculations performed by using the extended Huckel method for a model of Arg interacting with an Ag surface support the observed SERS results.
%0 Journal Article
%1 RN154
%A Garrido, C.
%A Aguayo, T.
%A Clavijo, E.
%A Gomez-Jeria, J.S.
%A Campos-Vallette, M.M.
%D 2013
%I 2013 John Wiley & Sons, Ltd.
%J Journal of Raman Spectroscopy
%K (eht), (sers), (xi), amino-acids, aromatic-hydrocarbons, dqcauchile enhanced extended huckel hydrochloride l-arginine, l-lysine, polycyclic potential protein, raman scattering scattering, spectra, spectroscopy, surface surface, temperature, theory zeta
%N 8
%P 1105-1110
%R 10.1002/jrs.4331
%T The Effect of the Ph on the Interaction of L-Arginine with Colloidal Silver Nanoparticles. A Raman and Sers Study
%U /brokenurl#<Go to ISI>://WOS:000323180700006
%V 44
%X Raman and surface enhanced Raman scattering (SERS) spectroscopies were used to study the pH effect (7 to 9) on the interaction of arginine (Arg) with colloidal Ag nanoparticles (AgNps). A new methodology was implemented in order to obtain reproducible SERS spectra in solution. The dependence of the Arg concentration on the stability of the AgNps is discussed. A pH increasing of the colloidal solution to the limits of the Arg pKa(2) value induces a preferential and stable Arg-metal interaction. potential measurements of the Arg-AgNps system at different pH conditions studied provide information about the Arg-AgNps interaction; the pH increasing favors the interaction. SERS spectra at pH 7 indicate that the molecule interacts with the Ag surface only through the guanidinium fragment. By increasing the pH to 9, the molecule adopts a new conformation on the surface; the metal-analyte interaction is verified through the guanidinium, carboxylate and the aliphatic moieties. In addition, theoretical calculations performed by using the extended Huckel method for a model of Arg interacting with an Ag surface support the observed SERS results.
@article{RN154,
abstract = {Raman and surface enhanced Raman scattering (SERS) spectroscopies were used to study the pH effect (7 to 9) on the interaction of arginine (Arg) with colloidal Ag nanoparticles (AgNps). A new methodology was implemented in order to obtain reproducible SERS spectra in solution. The dependence of the Arg concentration on the stability of the AgNps is discussed. A pH increasing of the colloidal solution to the limits of the Arg pKa(2) value induces a preferential and stable Arg-metal interaction. potential measurements of the Arg-AgNps system at different pH conditions studied provide information about the Arg-AgNps interaction; the pH increasing favors the interaction. SERS spectra at pH 7 indicate that the molecule interacts with the Ag surface only through the guanidinium fragment. By increasing the pH to 9, the molecule adopts a new conformation on the surface; the metal-analyte interaction is verified through the guanidinium, carboxylate and the aliphatic moieties. In addition, theoretical calculations performed by using the extended Huckel method for a model of Arg interacting with an Ag surface support the observed SERS results.},
added-at = {2019-12-04T03:57:35.000+0100},
author = {Garrido, C. and Aguayo, T. and Clavijo, E. and Gomez-Jeria, J.S. and Campos-Vallette, M.M.},
biburl = {https://www.bibsonomy.org/bibtex/2784275a056716c217e509f93d8cddc61/dqcauchile},
doi = {10.1002/jrs.4331},
interhash = {f44cda56052adccb12854fbd0b80b80f},
intrahash = {784275a056716c217e509f93d8cddc61},
issn = {0377-0486},
journal = {Journal of Raman Spectroscopy},
keywords = {(eht), (sers), (xi), amino-acids, aromatic-hydrocarbons, dqcauchile enhanced extended huckel hydrochloride l-arginine, l-lysine, polycyclic potential protein, raman scattering scattering, spectra, spectroscopy, surface surface, temperature, theory zeta},
number = 8,
pages = {1105-1110},
publisher = {2013 John Wiley & Sons, Ltd.},
timestamp = {2019-12-04T03:58:17.000+0100},
title = {The Effect of the Ph on the Interaction of L-Arginine with Colloidal Silver Nanoparticles. A Raman and Sers Study},
type = {Journal Article},
url = {/brokenurl#<Go to ISI>://WOS:000323180700006},
volume = 44,
year = 2013
}