%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 }