Publicaciones 2011-2020

@article{RN208,
title = {Surface Enhanced Raman Scattering Study of the Antioxidant Alkaloid Boldine Using Prismatic Silver Nanoparticles},
author = { M.A. Herrera and G.P. Jara and R. Villarroel and A.E. Aliaga and J.S. Gomez-Jeria and E. Clavijo and C. Garrido and T. Aguayo and M. Campos-Vallette},
url = {/brokenurl#<Go to ISI>://WOS:000340330900076},
doi = {10.1016/j.saa.2014.05.070},
issn = {1386-1425},
year = {2014},
date = {2014-01-01},
journal = {Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy},
volume = {133},
pages = {591-596},
publisher = {2014 Elsevier B.V.},
abstract = {Prismatic silver nanoparticles (PNps) were used in the surface enhanced Raman scattering (SEAS) study of the antioxidant alkaloid boldine (5,6,6a,7-tetrahydro-1,10-dimethoxy-6-methyl-4H-dibenzo[de,g]quinoline-2,9-diol). Prismatic and quasi-spherical (QsNps) silver nanoparticles were synthesized and characterized by UV Vis spectra, topographic profile (AFM) and zeta potential measurements. Raman and infrared (IR) spectra of the boldine were registered. Theoretical model calculations of the boldine onto the Ag surface predict a nearly coplanar orientation of the benzo[de]quinoline moiety and non-bonded interactions (electrostatic).},
keywords = {approximations, aromatic-hydrocarbons, boldine, enhanced extended hartree-fock huckel molecular-orbital nanoparticles, polycyclic prismatic raman scattering, sers silver spectroscopy, surface theories, theory, type},
pubstate = {published},
tppubtype = {article}
}

@article{RN153,
title = {Raman and Surface Enhanced Raman Scattering of a Black Dyed Silk},
author = { T. Aguayo and C. Garrido and E. Clavijo and J.S. Gomez-Jeria and C.A. Monasterio and M. Icaza and F.E. Moraga and M. Campos-Vallette},
url = {/brokenurl#<Go to ISI>://WOS:000323784900005},
doi = {10.1002/jrs.4348},
issn = {0377-0486},
year = {2013},
date = {2013-01-01},
journal = {Journal of Raman Spectroscopy},
volume = {44},
number = {9},
pages = {1238-1245},
publisher = {2013 John Wiley & Sons, Ltd.},
abstract = {The Raman and surface enhanced Raman scattering (SERS) spectra of a black dyed silk sample (BDS) were registered. The spectral analysis was performed on the basis of Raman and SERS spectral data of isolated samples of Bombyx mori silk fibroin, its motif peptide component (GAGAGS) and the synthetic reactive black 5 dye (RB5). The macro FT-Raman spectrum of the silk sample is consistent with a silk II-Cp crystalline fraction of Bombyx mori silk fibroin; the SERS spectrum is highly consistent with conformational modifications of the fibroin due to the interactions with the Ag nanoparticles. The GAGAGS peptide sequence dominates the Raman spectrum of the silk. The SERS spectrum of the peptide suggests a random coil conformation imposed by the surface interaction; the serine residue in the new conformation is exposed to the surface. Quantum chemical calculations for a model of the GAGAGS-Ag surface predict a nearly extended conformation at the Ag surface. The Raman spectrum of the dye was analysed, and a complete band assignment was proposed; it was not possible to propose a preferential orientation or organization of the molecule on the metal surface. Quantum chemical calculations for a model of the dye interacting with a silver surface predict a rather coplanar orientation of the RB5 on the Ag metal surface. The Raman spectrum of the BDS sample is dominated by signals from the dye; the general spectral behaviour indicates that the dye mainly interacts with the silk through the sulphone (-SO2-) and sulphonate (-SO2-O-) groups. Besides the presence of dye signals, mainly ascribed to the sulphone and sulphonate bands, the SERS spectrum of the BDS sample also displays bands belonging to the amino acids alanine, glycine, serine and particularly tyrosine.},
keywords = {aromatic-hydrocarbons, art, dye, fibroin, gagags, microscopy, model, nmr polycyclic raman, resonance sers, silk, spectroscopy},
pubstate = {published},
tppubtype = {article}
}

@article{RN154,
title = {The Effect of the Ph on the Interaction of L-Arginine with Colloidal Silver Nanoparticles. A Raman and Sers Study},
author = { C. Garrido and T. Aguayo and E. Clavijo and J.S. Gomez-Jeria and M. Campos-Vallette},
url = {/brokenurl#<Go to ISI>://WOS:000323180700006},
doi = {10.1002/jrs.4331},
issn = {0377-0486},
year = {2013},
date = {2013-01-01},
journal = {Journal of Raman Spectroscopy},
volume = {44},
number = {8},
pages = {1105-1110},
publisher = {2013 John Wiley & Sons, Ltd.},
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.},
keywords = {amino-acids, aromatic-hydrocarbons, enhanced extended huckel hydrochloride l-arginine, l-lysine, polycyclic potential protein, raman scattering scattering, spectra, spectroscopy, surface surface, temperature, theory zeta},
pubstate = {published},
tppubtype = {article}
}