Publicaciones 2011-2020

@article{RN356,
title = {Tailoring Electroactive Surfaces by Non-Template Molecular Assembly. Towards Electrooxidation of L-Cysteine},
author = { M. Santander-Nelli and C.P. Silva and J. Espinoza-Vergara and J.F. Silva and C.F. Olguin and D. Cortes-Arriagada and J.H. Zagal and F. Mendizabal and I. Diez-Perez and J. Pavez},
url = {/brokenurl#<Go to ISI>://WOS:000413239600022},
doi = {10.1016/j.electacta.2017.09.082},
issn = {0013-4686},
year = {2017},
date = {2017-01-01},
journal = {Electrochimica Acta},
volume = {254},
pages = {201-213},
publisher = {2017 Elsevier Ltd.},
abstract = {We have prepared a nanoelectrode ensemble containing vertically aligned single walled carbon nanotubes (SWCNTs) using a non-template molecular self-assembling strategy. We used a bottom-up construction approach to assemble amino functionalized SWCNTs (af-SWCNTs) in a well-defined architecture. These af-SWCNTs were linked and vertically aligned to pre-formed self-assembled monolayers of 4-MBA. A Cobalt(II) tetracarboxyphthalocyanine (Co(COOH)(4)Pc) complex was covalently bonded to external portion of af-SWCNTs to complete the final nanoelectrode ensemble. X-ray photoelectron spectroscopy (XPS) and Atomic Force Microcopy (AFM) confirmed the effectiveness of the assembling steps on the gold surface starting from the Au/MBA SAMs. The system Au/4-MBA/af-SWCNTs shows an interface with large ordered array, which exhibits a high activity for the electrooxidation of L-cysteine (L-cys). Theoretical calculations suggest that the incorporation of the af-SWCNTs increased the activity of the assembly to electronic transfer and it was observed that the electrooxidation reaction is energetically favorable.},
keywords = {arrays, assembly, bottom-up carbon chemistry, construction, dft, electrocatalytic electrode, graphite hardness, intermolecular iron metal metallophthalocyanines, model modified molecular nanoelectrode nanotube, nanotubes, phthalocyanines phthalocyanines, sams, set single substituted tetra-aminophthalocyanine, walled},
pubstate = {published},
tppubtype = {article}
}

@article{RN277,
title = {Adsorption of as (V) by Poly (N-Octyl-4-Vinylpyridinium) Bromide: Determination of as (V) by Direct Measurement of Fluorescence on the Solid Phase},
author = { J. Gonz\'{a}lez-Navarrete and M.I. Toral and A. Leiva and M. Yazdani-Pedram and H. Rios and X. Briones and M. Urz\'{u}a},
url = {/brokenurl#<Go to ISI>://WOS:000390510200015},
doi = {10.1016/j.reactfunctpolym.2016.10.011},
issn = {1381-5148},
year = {2016},
date = {2016-01-01},
journal = {Reactive & Functional Polymers},
volume = {109},
pages = {112-119},
publisher = {2016 Elsevier B.V.},
abstract = {Adsorption of As (V) by poly (N-octyl-4-vinylpyridinium) bromide (P4VPyC8), used as solid phase, was studied. Determination of As (V) was carried out by direct measurement of the fluorescence intensity on the solid phase. Adsorption variables were optimized for obtaining optimum values of pH and agitation time, where pH 9.0 and 60 min were established as optimum values. The adsorption of arsenic (V) was characterized by infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy. It was found that the fluorescence of the solid phase increases as the concentration of arsenic increases. Linearity was observed in the concentration range 6.80 to 90.0 mu g L-1. The detection limit for determination of As (V) by this method was 2.24 mu g L-1 and the relative standard deviation (RSD) was 1.72%. The amount of retained As (V) was 0.154 mg/g of solid phase. The determination of As (V) in a sample of tap water by this method was well compared with the value reported by an external certified laboratory. Therefore, the method of analysis proposed here could be used as a screening methodology for monitoring the fulfillment of the norm for arsenic concentration in tap water.},
keywords = {adsorption, arsenate, arsenic arsenic, atomic-absorption-spectrometry, carbon drinking-water, extraction, fluorescence, heavy-metal ions, nanotubes, performance phase, preconcentration, removal, samples, solid toxic water},
pubstate = {published},
tppubtype = {article}
}

@article{RN89,
title = {Layered Graphitic Carbon Host Formation During Liquid-Free Solid State Growth of Metal Pyrophosphates},
author = { C. Diaz and M.L. Valenzuela and V. Lavayen and C. O'dwyer},
url = {/brokenurl#<Go to ISI>://WOS:000304728500029},
doi = {10.1021/ic300767h},
issn = {0020-1669},
year = {2012},
date = {2012-01-01},
journal = {Inorganic Chemistry},
volume = {51},
number = {11},
pages = {6228-6236},
abstract = {We report a successful ligand- and liquid-free solid state route to form metal pyrophosphates within a layered graphitic carbon matrix through a single step approach involving pyrolysis of previously synthesized organometallic derivatives of a cyclotriphosphazene. In this case, we show how single crystal Mn2P2O7 can be formed on either the micro- or the nanoscale in the complete absence of solvents or solutions by an efficient combustion process using rationally designed macromolecular trimer precursors, and present evidence and a mechanism for layered graphite host formation. Using in situ Raman spectroscopy, infrared spectroscopy, X-ray diffraction, high resolution electron microscopy, thermogravimetric and differential scanning calorimetric analysis, and near-edge X-ray absorption fine structure examination, we monitor the formation process of a layered, graphitic carbon in the matrix. The identification of thermally and electrically conductive graphitic carbon host formation is important for the further development of this general ligand-free synthetic approach for inorganic nanocrystal growth in the solid state, and can be extended to form a range of transition metals pyrophosphates. For important energy storage applications, the method gives the ability to form oxide and (pyro)phosphates within a conductive, intercalation possible, graphitic carbon as host-guest composites directly on substrates for high rate Li-ion battery and emerging alternative positive electrode materials.},
keywords = {characterization, nanocomposites, nanoparticles, nanotubes, nanowires precursor, pyrolysis, spectroscopic},
pubstate = {published},
tppubtype = {article}
}