Browsing by Author "c0f6d337-8b1c-4f61-95aa-d89dce5b1e44"

Now showing items 21-33 of 33

    • SERS and theoretical studies of arginine 
      Aliaga, A. E.; Garrido, C.; Leyton, P.; Díaz Fleming, Guillermo; Gómez Jeria, Juan; Aguayo, T.; Clavijo Campos, Ernesto; Campos Vallette, Marcelo; Sánchez Cortés, S. (PERGAMON-ELSEVIER SCIENCE LTD, 2010-01-27)
      Arginine amino acid (Arg) has been vibrationally studied through its infrared, Raman and surfaceenhanced Raman scattering (SERS) spectra, and theoretical calculations. Net charge is used to predict the possibility to ...
    • SERS spectrum of gallic acid obtained from a modified silver colloid 
      Garrido, C.; Díaz Fleming, Guillermo; Campos Vallette, Marcelo (Elsevier, 2016)
      Two different crystals of the gallic acid were microscopically separated from a p.a. commercial product. The Raman spectra analysis allowed distinguishing monomeric and dimeric structures. The vibrational wave numbers were ...
    • SERS spectrum of red dyes in the Mapuche belts from the beginning of the XXth century 
      Campos Vallette, Marcelo; Rodríguez, M. J.; Chapanoff, M. A.; Clavijo Campos, Ernesto; Gómez Jeria, Juan; Aliaga, A. E.; Jara, G. P.; Celis, F.; Paipa, C.; Leyton, P. (Wiley, 2017)
      Red dyes in seven belts (trariwe) belonging to the Mapuche culture, dated as beginning of the XXth century and stored in Museo Regional de la Araucania, Chile, were studied by using ultraviolet-visible, liquid chromatography ...
    • SERS, Molecular Dynamics and Molecular Orbital Studies of the MRKDV Peptide on Silver and Membrane Surfaces 
      Aliaga, Alvaro E.; Ahumada, Hernán; Sepúlveda, K.; Gómez Jeria, Juan; Garrido, C.; Weiss López, Boris; Campos Vallette, Marcelo (AMER CHEMICAL SOC, 2011-03-17)
      The MRKDV peptide, structurally associated 9 with an immunomodulatory protein, was studied using surface 10 enhanced Raman scattering (SERS), molecular dynamics (MD) 11 simulations, and quantum chemical calculations. ...
    • Study of the effect of branching in degradation of polyethylenes obtained via metallocene catalyst 
      Escudero Acevedo, Mario; Quijada Abarca, Juan; Campos Vallette, Marcelo (SOC CHILENA QUIMICA, 2008-06)
      Polyethylenes, homo and copolymers obtained via metallocene catalyst, were synthesized and used to study the effect of comonomer size and content in the main linear backbone polymer on its degradation. Homoethylene metallocene ...
    • Surface Enhanced Raman Spectrum of Nanometric Molecular Systems 
      Leyton, Patricio; Lizama Vergara, P. A.; Campos Vallette, Marcelo; Becker, María Inés; Clavijo Campos, Ernesto; Córdova Reyes, I.; Vera, M.; Jerez Guevara, Carlos (SOCIEDAD CHILENA DE QUIMICA, 2005-12)
      Surface-enhanced Raman spectroscopy (SERS) was demonstrated to be a useful and sensitive structural spectroscopic tool for the characterization of different types of supramolecular architectures, ideally suited for trace ...
    • Surface enhanced vibrational (IR and Raman) spectroscopy in the design of chemosensors based on ester ... 
      Leyton, Patricio; Domingo, C.; Sánchez Cortés, S.; Campos Vallette, Marcelo; García Ramos, J. V. (AMER CHEMICAL SOC, 2005-12-06)
      Surface-enhanced IR (SEIR) and Raman scattering (SERS) have been employed to study the adsorption of ester functionalized tert-butyl calix[4]arenes on Ag and Au nanostructured surfaces as well as their complexes with pyrene. ...
    • Surface-Enhanced Raman Scattering and Theoretical Studies of the C-Terminal Peptide of the beta-Subunit ... 
      Aliaga, A. E.; Aguayo, T.; Garrido, C.; Clavijo Campos, Ernesto; Hevia, E.; Gómez Jeria, Juan; Leyton, P.; Campos Vallette, Marcelo; Sánchez Cortés, S. (JOHN WILEY & SONS INC, 2011-09-08)
      Raman and surface-enhanced Raman scattering (SERS) spectra of the synthetic carboxy terminal peptide of human chorionic gonadatropin b-subunit free of carbohydrate moieties (P37) are reported. The spectral analysis is ...
    • Theoretical study of the syn and anti thiophene-2-aldehyde conformers using density functional theory and ... 
      Díaz Fleming, Guillermo; Koch, Rainer; Campos Vallette, Marcelo (PERGAMON-ELSEVIER SCIENCE LTD, 2006-11)
      An extensive computational study of thiophene-2-aldehyde conformers syn and anti has been carried out using density functional (DFT). From these calculations, B3LYP/6-31G(d) has been chosen as it produces results remarkably ...
    • Theoretical surface-enhanced Raman spectra study of substituted benzenes I. Density functional theoretical ... 
      Díaz Fleming, Guillermo; Golsio, Italo; Aracena, Andrés; Celis, Freddy; Vera, Leticia; Koch, Rainer; Campos Vallette, Marcelo (PERGAMON-ELSEVIER SCIENCE LTD, 2008-12-01)
      This paper reports a DFT modelling of SERS spectra for benzene and benzonitrile on the basis of a simple noncoordinate substrate-adsorbate model. Assignment of normal modes was obtained from internal force constants and ...
    • Theoretical surface-enhanced Raman spectra study of substituted benzenes II. Density functional theoretical ... 
      Díaz Fleming, Guillermo; Golsio, Italo; Aracena, Andrés; Celis, Freddy; Vera, Leticia; Koch, Rainer; Campos Vallette, Marcelo (PERGAMON-ELSEVIER SCIENCE LTD, 2008-12-01)
      The SERS modelling of o-, m-, and p-methoxybenzonitrile has been performed following the same methodology that in Part I. Optimized structure obtained from DFT calculations in a B3LYP-LANL2DZ level of calculation shows ...
    • Thermal oxidation of metallocene ethylene-1-olefin copolymer films during one year oven aging 
      Escudero Acevedo, Mario; Quijada Abarca, Juan; Campos Vallette, Marcelo (ELSEVIER, 2008-10)
      Metallocene ethylene homopolymer, ethylene-1-hexene and ethylene-1-octadecene copolymer films were characterized and analysed during their aging in a forced draft oven at 60 degrees C and compared to commercial polymers ...
    • Vibrational analysis of metal diimine dithiolate mixed ligand complexes 
      Díaz, Guillermo; Diez, Sylvia; Campos Vallette, Marcelo; Zink, Jeffrey I. (Elsevier, 1999)
      The IR spectra of the M(mnt)(baba) where M = Ni and Pd, mnt = 1,2-maleonitrile and baba = biacetylbisanyline, were recorded in the high as well in the low energy region. A complete assignment of the observed bands was ...