Zobrazeno 1 - 10 of 10 pro vyhledávání: '"J. H. Vélez"'
1
Akademický článek
Critical Comparison between Modified Monier-Williams and Electrochemical Methods to Determine Sulfite in Aqueous Solutions
Autor: C. Montes, J. H. Vélez, G. Ramírez, M. Isaacs, R. Arce, M. J. Aguirre
Publikováno v: The Scientific World Journal, Vol 2012 (2012)
In the present work, known concentration of sulfite aqueous solutions in the presence and absence of gallic acid was measured to corroborate the validity of modified Monier-Williams method. Free and bound-sulfite was estimated by differential pulse v
Externí odkaz: https://doaj.org/article/d617c6144e30459fb8ed8a75bcfe7801
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3
Critical Comparison between Modified Monier-Williams and Electrochemical Methods to Determine Sulfite in Aqueous Solutions
Autor: Mauricio Isaacs, J. H. Vélez, María J. Aguirre, Galo Ramírez, Roxana Arce, C. Montes
Publikováno v: The Scientific World Journal
THESCIENTIFICWORLDJOURNAL
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
The Scientific World Journal, Vol 2012 (2012)
In the present work, known concentration of sulfite aqueous solutions in the presence and absence of gallic acid was measured to corroborate the validity of modified Monier-Williams method. Free and bound-sulfite was estimated by differential pulse v
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83805476507f8655ab28359598a40711
https://doi.org/10.1100/2012/168148
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4
Synthesis, characterization and polymerization of thiophene units anchored with an imine-type mesogen group
Autor: J. H. Vélez, F. R. Diaz, G. A. East, Juan Pablo Soto, M. A. del Valle
Publikováno v: Polymer Bulletin. 59:127-134
Thiophene structures anchored in position 3 of the ring were synthesized using spacers of different lengths (6,8,10, and 12 carbon atoms linked to a 2-((4-octylphenylimino)methyl)phenol) group. The thermal studies of the units demonstrated that they
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7ed818d686139a6066faecc2038da9b2
https://doi.org/10.1007/s00289-007-0752-2
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6
Small molecules organic photovoltaic devices based on the planar heterojunction porphyrin derivates/fullerene
Autor: M. Jesús Aguirre, J. C. Bernède, J. H. Vélez, Mohammed Makha, Linda Cattin
Publikováno v: Journal of Porphyrins and Phthalocyanines
Journal of Porphyrins and Phthalocyanines, World Scientific Publishing, 2014, 18, pp.347-432. ⟨10.1142/S1088424613501253⟩
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
In this paper, we studied of photoelectric properties of multilayer organic photovoltaic cells (OPV cells). The active organic layers consisted of a planar heterojunction between a layer of (meso-tetrakis(5-bromo-2-thienyl)porphyrin), (TBrTP) as elec
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a3a97bad2068971fb7dc72d1116d6588
https://hal.univ-angers.fr/hal-03350409/file/1350125-velez.pdf
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7
Electropolymerization of 3 ,4 -disubstituted 2,2 :5 ,2 -terthiophene derivatives. A theoretical and photovoltaic characterization
Autor: J. C. Bernède, J. H. Vélez, Alejandro Toro-Labbé, Fernando R. Díaz, Gaston A. East, María Angélica del Valle, Soledad Gutiérrez-Oliva
Publikováno v: JOURNAL OF MOLECULAR MODELING
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
In the present work a series of β-substituted thiophenes have been synthesized and their electrochemical behavior studied. The products obtained by electro-oxidation are highly dependent on the substituent, affording sometimes conducting polymers, i
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d2b8381a5818283d0cd7cd592791c416
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8
Nucleation and growth mechanisms during electropolymerization of substituted 3-alkylthiophenes
Autor: G. A. East, M. A. del Valle, J. H. Vélez, Juan Pablo Soto, F. R. Diaz
Publikováno v: APPLIED SURFACE SCIENCE
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
In the present work the electrochemical study of compounds based on 3-((ω-bromoalkyloxy) methyl) thiophene, varying the length of the alkyl chain between 6 and 12 carbon atoms, is reported. Electropolymerization of the monomers was achieved by poten
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb82b618dd6840344df7bd7a161165ae
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10
Akademický článek
Arsenic extraction using polypyrrole modified electrodes.
Autor: M. A. del Valle, G. M. Soto, L. Guerra, J. H. Vélez, F. R. Díaz
Publikováno v: Polymer Bulletin; Feb2004, Vol. 51 Issue 4, p301-305, 5p
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