Publicaciones 2011-2020

@article{RN422,
title = {Effect of the Nature of the Nucleophile and Solvent on an Snar Reaction},
author = { M. Gazitua and R.A. Tapia and R. Contreras and P.R. Campodonico},
url = {/brokenurl#<Go to ISI>://WOS:000418369000027},
doi = {10.1039/c7nj03212a},
issn = {1144-0546},
year = {2018},
date = {2018-01-01},
journal = {New Journal of Chemistry},
volume = {42},
number = {1},
pages = {260-264},
abstract = {The reaction of 2,4-dinitrobenzenesulfonyl chloride toward propylamine was kinetically evaluated in 19 organic solvents and 10 ionic liquids as reaction media. This study was compared with a previous study to experimentally show that solvent effects and the nature of the reacting pair drastically affect the reaction rate and the reaction mechanism. While the reaction of the reference electrophile 2,4-dinitrobenzenesulfonyl chloride with piperidine is favored in polar solvents with the ability to donate or accept hydrogen bonds, the reaction with propylamine is favored in solvents with the ability to accept hydrogen bonds.},
keywords = {amines, aromatic aryl azides, conventional ionic kinetics, liquids, preferential reaction-mechanism, regioselectivity solvation, solvents, substitutions, temperature},
pubstate = {published},
tppubtype = {article}
}

@article{RN402,
title = {Influence of the Anion Nature and Alkyl Substituents in the Behavior of Ionic Liquids Derived from Phenylpyridines},
author = { P. Dreyse and D.A. Alarcon and A. Gald\'{a}mez and I. Gonz\'{a}lez and D. Cortes-Arriagada and F. Castillo and A. Mella},
url = {/brokenurl#<Go to ISI>://WOS:000418212000043},
doi = {10.1016/j.molstruc.2017.10.062},
issn = {0022-2860},
year = {2018},
date = {2018-01-01},
journal = {Journal of Molecular Structure},
volume = {1154},
pages = {382-391},
publisher = {2017 Elsevier B.V.},
abstract = {Quaternary alkyl 2-phenylpyridinium and 2-(2,4-difluorophenyl)pyridinium amines with iodide, hexafluorophosphate and bis(trifluoromethylsulfonyl)imide anions have been fully characterized by H-1 NMR, FT-IR and MALDI mass spectroscopic methods and studied by quantum chemistry calculations. The compounds with bis(trifluoromethylsulfonyl)imide anion can be classified as ionic liquids, because they melt at room temperature. The quaternary amines with iodide and hexafluorophosphate anions are solid at 25 degrees C. The X-ray diffraction characterization of the 2-(2,4-difiuorophenyl)-1-methylphenylpyridinium hexafluorophosphate and 1-ethyl-2-(2,4-difluorophenyl)phenylpyridinium hexafluorophosphate show an extensive series of C-H center dot center dot center dot F, C-F center dot center dot center dot pi and P-F center dot center dot center dot pi it intermolecular interactions, which give rise to a supramolecular network. The relationship between the solid-state structures and the melting points is discussed by the evaluation of the thermal behavior based on experimental data from Differential Scanning Calorimetry (DSC) studies, and also using the analysis of the ion pairs binding energies. These new compounds based on phenylpyridine allow us to grow the diversity of ionic liquids and their crystalline salts, increasing the knowledge about the chemical and physical properties of these ionic species.},
keywords = {binding compounds, crystal design electrochemical-cells, emitting energies, gold ion ionic liquids, nanoparticles, pairs phenylpyridiniums, salts, solvents, structure, temperature, transition, transport, water},
pubstate = {published},
tppubtype = {article}
}

@article{RN363,
title = {Effect of the Seed Layer on the Growth and Orientation of the Zno Nanowires: Consequence on Structural Optical Properties},
author = { A. Serrano and A. Arana and A. Gald\'{a}mez and A. Dutt and B.M. Monroy and F. Guell and G. Santana},
url = {/brokenurl#<Go to ISI>://WOS:000416184600065},
doi = {10.1016/j.vacuum.2017.03.010},
issn = {0042-207x},
year = {2017},
date = {2017-01-01},
journal = {Vacuum},
volume = {146},
pages = {509-516},
publisher = {2017 Elsevier Ltd.},
abstract = {High quality vertically aligned zinc oxide (ZnO) nanowires (NWs) were grown on Au-coated aluminum doped zinc oxide (AZO) thin films via vapor-liquid-solid (VLS) technique. AZO seed layers were deposited using two different techniques named as ultrasonic spray pyrolysis (USP) and magnetron sputtering. Structural, morphological and compositional properties of the NWs grown on the two distinct seed layers were analyzed in detail by using X-ray diffraction (XRD), scanning electronic microscopy (SEM) and energy dispersive spectroscopy (EDS) techniques, respectively. In the first case, (seed layer grown by USP technology), NWs showed the (101) orientation, whereas in the second case, (seed layer grown by sputtering) NWs showed (002) orientation. It was confirmed by the SEM images, that NWs with (002) orientation shown better vertical alignment than NWs with (101) orientation. In addition, optical properties were also studied using photoluminescence (PL) spectroscopy and irrespective of the preferred orientation, NWs showed a strong green emission at room temperature. The study made in the present work on the seed layer preparation by two techniques and hence, deposition conditions to achieve fully controllable ZnO nanowires with precise distance, shape, position and orientation could provide opportunities for the fabrication of future optoelectronic devices.},
keywords = {fabrication, layer, luminescence, nanostructures, networks, photoluminescence pressure properties, pyrolysis, seed spray sputtering, temperature, thin-films, ultrasonic zinc-oxide zno},
pubstate = {published},
tppubtype = {article}
}

@article{aliaga2015onepot,
title = {An Easy One-Pot Solvothermal Synthesis of Poorly Crystalline Solid Res2/C Microspheres},
author = { J.A. Aliaga and J.F. Araya and H. Lozano and E. Benavente and G. Alonso-Nunez and G. Gonz\'{a}lez},
url = {/brokenurl#<Go to ISI>://WOS:000348263600051},
doi = {10.1016/j.matchemphys.2014.12.012},
issn = {0254-0584},
year = {2015},
date = {2015-01-01},
journal = {Materials Chemistry and Physics},
volume = {151},
pages = {372-377},
publisher = {2014 Elsevier B.V.},
abstract = {Dense microspheres consisting of poorly crystalline ReS2 embedded in carbon were synthesized with a high yield via a facile one-pot solvothermal route, by reacting dirhenium decacarbonyl, elemental sulfur and an aromatic solvent (benzene, toluene or p-xylene) for 24 h at 180 degrees C. X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS), Raman spectroscopy, and Fourier transform infrared spectroscopy (Fr-IR) techniques were used to characterize the samples. The resulting microspheres were dense, with average diameters between 0.79 and 1.40 mu m, had smooth surfaces and were constructed of ReS2 sheet-like structures with 4.5-9.8 wt % of structural amorphous carbon, which is retained as a textural stabilizer after calcination at 800 degrees C. The synthesis was repeated using isopropanol and cyclohexane, whose products were agglomerated grains and botryoidal quasi-spherical particles, respectively. A possible formation mechanism of ReS2/C microspheres was preliminarily presented, in order to clarify the mechanistic differences between the rhenium carbonyl and other transition metal carbonyls used in similar syntheses.},
keywords = {amorphous carbon chalcogenides, composite growth-mechanism, material, nanoparticles, reduction, rhenium sulfide, technetium, temperature},
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}
}