Browsing by Author "Campos Vallette, Marcelo"

Now showing items 21-40 of 43

    • Raman study of the shockwave effect on collagens 
      Cárcamo, José J.; Aliaga, Alvaro E.; Clavijo Campos, Ernesto; Brañes, Manuel R.; Campos Vallette, Marcelo (Elsevier, 2012)
      The Raman spectra (1800–200 cm−1) of isolated dried collagen types I and III were recorded at different times after shockwave (SW) application in aqueous media. SWs were applied in a single session. One week after the ...
    • Raman, infrared, SERS and theoretical study of 3-(1-phenylpropan-2-ylamino) propanenitrile, fenproporex 
      Díaz Fleming, Guillermo; Célis, Freddy; Campos Vallette, Marcelo; Aliaga, Alvaro E.; Escobar, Marcela; Koch, Rainer (2011)
      Infrared, Raman and surface-enhanced Raman scattering (SERS) spectra of 3-(1-phenylpropan-2-ylamino)propanenitrile (fenproporex) have been recorded. Density functional theory (DFT) with the B3LYP functional was used for ...
    • Spectra and structure of polyamine-copper(II) complexes. Infrared spectrum and normal coordinate calculations ... 
      Díaz, Guillermo; Diez, Sylvia; López, Luis; Muñoz, René; Campos Vallette, Marcelo; Manríquez, Víctor; Wittke, Oscar (1993)
      The infrared spectrum of mono(diethylenetriamine)copper(II) nitrate has been obtained in the frequency range 4000-80 cm-1. Assignments of fundamental frequencies in the coordination site, as well as in the free and bonded ...
    • Specular reflectance infrared spectra of the macrocycles cyclam and cyclamdione and their Cu( II) complexes ... 
      Diaz, G. F.; Clavijo Campos, Ernesto; Campos Vallette, Marcelo; Saavedra, M. S.; Diez, S.; Muñoz, R. (1997)
      An infrared study of the macrocycles cyclam, cyclamdione and its Cu(II) complexes has been performed. The specular reflectance infrared spectrum was recorded and analyzed for the ligands and complexes deposited onto a ...
    • Surface enhanced Raman scattering study of l-lysine 
      Aliaga, A. E.; Osorio Román, Igor; Garrido, C.; Leyton, P.; Cárcamo Vega, José; Clavijo Campos, Ernesto; Gómez Jeria, Juan; Díaz Fleming, Guillermo; Campos Vallette, Marcelo (2009)
      Different SERS spectra of lysine (Lys) in Ag colloidal surface were obtained. No identical SERS spectra of Lys were observed after a stabilization period, suggesting that a unique conformation and orientation on the metal ...
    • Surface enhanced Raman scattering study of the antioxidant alkaloid boldine using prismatic silver nanoparticles 
      Herrera, M .A.; Jara, G. P.; Villarroel, R.; Aliaga, A. E.; Gómez Jeria, Juan; Clavijo Campos, Ernesto; Garrido, C.; Aguayo, T.; Campos Vallette, Marcelo (Elsevier, 2013)
      Prismatic silver nanoparticles (PNps) were used in the surface enhanced Raman scattering (SERS) study of the antioxidant alkaloid boldine (5,6,6a,7-tetrahydro-1,10-dimethoxy-6-methyl-4H-dibenzo[de,g]quinoline-2,9-diol). ...
    • Surface vibrational study of macrocycle complexes: Co(II), Ni(II), Cu(II) and Zn(II) bis(phenylhydrazine) ... 
      Díaz Fleming, Guillermo; Campos Vallette, Marcelo; Saavedra, M. S.; Clavijo Campos, Ernesto; Canales, J. C.; Costamagna, J.; Vargas, J. (Elsevier, 2002)
      A complete assignment of the infrared spectra of the title macrocycles was carried out on the basis of well-documented references and a normal coordinate analysis based on a simplified molecular model. The structure of the ...
    • Surface-enhanced Raman scattering and density functional theory studies of bis(4-aminophenyl)sulfone 
      Díaz Fleming, Guillermo; Célis, Freddy; Fredes, Carlos; Campos Vallette, Marcelo; Aliaga, Alvaro E.; Koch, Rainer (2010)
      Raman and surface-enhanced Raman scattering (SERS) spectra of dapsone by using colloidal silver nanoparticles have been recorded. Density functional theory was used for the optimization of ground state geometries and ...
    • Surface-enhanced Raman scattering and theoretical studies of the C-terminal peptide of the β-subunit human ... 
      Aliaga, A. E.; Aguayo, T.; Garrido, C.; Clavijo Campos, Ernesto; Hevia, E.; Gómez Jeria, Juan; Leyton, P.; Campos Vallette, Marcelo; Sánchez Cortés, S. (2011)
      Raman and surface-enhanced Raman scattering (SERS) spectra of the synthetic carboxy terminal peptide of human chorionic gonadatropin β-subunit free of carbohydrate moieties (P37) are reported. The spectral analysis is ...
    • Surface-enhanced Raman scattering and theoretical study of the bilichromes biliverdin and bilirubin 
      Celis, F.; Campos Vallette, Marcelo; Gómez Jeria, Juan; Clavijo Campos, Ernesto; Jara, G. P.; Garrido, C. (Taylor and Francis Inc., 2016)
      © 2016, Copyright © Taylor & Francis Group, LLC. The surface-enhanced Raman scattering spectra of biliverdin and bilirubin were obtained and analyzed; a physical silver ligand interaction was inferred. The structural ...
    • Surface-enhanced Raman scattering study of L-tryptophan 
      Aliaga, A. E.; Osorio Román, Igor; Leyton, P.; Garrido, C.; Cárcamo, J.; Caniulef, C.; Célis, F.; Díaz Fleming, Guillermo; Clavijo Campos, Ernesto; Gómez Jeria, Juan; Campos Vallette, Marcelo (2009)
      Surface-enhanced Raman scattering (SERS) spectra of tryptophan (Trp) were obtained. A unique SERS spectrum of Trp, corresponding to the most stable conformation and orientation on the metal surface, is observed after a ...
    • Surface-enhanced vibrational study of azabipiridyl and its Co(II), Ni(II) and Cu(II) complexes 
      Campos Vallette, Marcelo; Saavedra, M. S.; Diaz, G. F.; Clavijo Campos, Ernesto; Martinez, Y.; Mendizábal Emaldía, Fernando; Costamagna, Juan; Canales, J. C.; Garcı́a-Ramos, J. V.; Sánchez Cortés, S. (2001)
      The FT-Raman spectra and surface-enhanced Raman scattering (SERS) on silver colloid of the azabipiridyl ligand and its Co(II), Ni(II) and Cu(II) complexes are reported. A resonance Raman (RR) study of the solids and a ...
    • Vanadyl naphthalocyanine and vanadyl porphine phenyl substituted macrocycles: SERS and thin film organisation ... 
      Carrasco, E. A.F.; Campos Vallette, Marcelo; Saavedra, M. S.; Díaz Fleming, Guillermo; Clavijo Campos, Ernesto; García-Ramos, J. V.; Sánchez Cortés, S. (2001)
      Infrared (middle and far) and Raman spectroscopy were used to study the adsorption of vanadylnaphthalocyanine and vanadylporphine tetraphenyl substituted macrocycles adsorbed onto metallic surfaces. The IR spectra of the ...
    • Vibrational and scaled quantum chemical study of O,O-dimethyl S-methylcarbamoylmethyl phosphorodithioate, ... 
      Díaz Fleming, Guillermo; Celis, Freddy; Aracena, Andrés; Campos Vallette, Marcelo; Aliaga, Alvaro E.; Koch, Rainer (2012)
      Infrared and Raman spectra of O,O-dimethyl S- methylcarbamoylmethylphosphorodithioate, dimethoate, have been recorded. Density functional theory, DFT, with the B3LYP functional was used for the optimization of the ground ...
    • Vibrational and theoretical study of azabipiridyl macrocycle and its Ni(II), Cu(II) and Zn(II) complexes ... 
      Campos Vallette, Marcelo; Clavijo Campos, Ernesto; Costamagna, Juan; Canales, J.; Díaz Fleming, Guillermo; Mendizábal Emaldía, Fernando; Ramirez, J. M.; Saavedra, M. S. (Elsevier, 2000)
      The infrared spectra of the azabipiridyl macrocycle complexes of Ni(II), Cu(II) and Zn(II) were registered between 4000 and 200 cm-1. The spectral assignment allowed to identify the complex formation and structural differences ...
    • Vibrational interpretation of the structure of Co(II), VO2+ and Pb(II) naphthalocyanine complexes 
      Clavijo Campos, Ernesto; Campos Vallette, Marcelo; Saavedra, S. M.; Alvarado, A.; Díaz Fleming, Guillermo (1997)
      The FT-IR and Raman spectra for the solid naphthalocyanine (H2Nc) and their Co(II), VO2+ and Pb(II) complexes were registered, and a band assignment was proposed. On this basis, the structure of the complexes was inferred: ...
    • Vibrational spectra and surface-enhanced vibrational spectra of 1-nitropyrene 
      Carrasco-Flores, E. A.; Clavijo Campos, Ernesto; Campos Vallette, Marcelo; Aroca, R. F. (2004)
      The present report on the vibrational spectra of 1-nitropyrene (1-NP) describes the infrared and Raman spectra; their interpretation is aided by local density functional theory (DFT) calculations at the B3LYP/6-311G(d,p) ...
    • Vibrational study of hydrotris(pyrazolyl)borato complexes of rhenium(I) tricarbonyl 
      Guillermo Díaz, F.; Campos Vallette, Marcelo; Hugo Klahn O., A. (Elsevier, 1995)
      The Fourier transform infrared and Raman spectra of the complexes hydrotris(pyrazolyl)borato rhenium tricarbonyl [TpRe(CO)3] and hydrotris(3,5-dimethylpyrazolyl)borato rhenium tricarbonyl [Tp*Re(CO)3] and their ligand salts ...
    • Vibrational study of N-phenyl-substituted hydroxynaphthylaldiminate copper(II) complexes 
      Campos Vallette, Marcelo; Figueroa, K.; Latorre, Ramón; Díaz Fleming, Guillermo; Costamagna, J.; Canales, J. C.; Rey-Lafon, M.; Derouault, J. (1993)
      The infrared spectra of seven bis(N-phenyl-substituted hydroxynaphthylaldiminate) complexes of Cu(II) were scanned from 4000 to 100 cm-1. Particular emphasis is given to the low-energy region. The assignment of the chelate ...
    • Vibrational study of polyamine copper(II) complexes. Infrared spectra and normal coordinate analysis of ... 
      Díaz, Guillermo; Diez, Sylvia; López, Luis; Muñoz, René; Pessoa Mahana, Hernán; Campos Vallette, Marcelo (1992)
      The results of an investigation of the infrared spectra of mono(diethylenetriamine)copper(II) compounds are reported, with particular reference to the low-energy region. Most assignments are based on the available literature. ...