Listar por autor "Vallejo, William"
Mostrando ítems 1-9 de 9
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Article Comparative Study of ZnO Thin Films Doped with Transition Metals (Cu and Co) for Methylene Blue Photodegradation under Visible Irradiation
Vallejo, William (BarranquillaSede Norte, 2020-05-11)We synthesized and characterized both Co-doped ZnO (ZnO:Co) and Cu-doped ZnO (ZnO:Cu) thin films. The catalysts’ synthesis was carried out by the sol–gel method while the doctor blade technique was used for thin film ...
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Design, characterization and quantum chemical computations of a novel series of pyrazoles derivatives with potential anti-proinflammatory response
Burboa-Schettino, Pia (BarranquillaQuímicaSede Norte, 2020-06-24)The synthesis and characterization of the full family of 11 pyrazoles were performed by means of UV–Vis, FTIR, 1 H NMR, 13C NMR, two-dimensional NMR experiments and DFT simulations. As pyrazoles are known for showing ...
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Do-it-yourself methodology for calorimeter construction based in Arduino data acquisition device for introductory chemical laboratories
Vallejo, William (BarranquillaSede Norte, 2020-03-10)Many experimental thermochemical laboratories require monitoring temperatures during a reaction or physical procedure. Nowadays, there are many alternatives to fulfill this requirement; however, they are expensive for basic ...
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Google Colab and Virtual Simulations: Practical e‑Learning Tools to Support the Teaching of Thermodynamics and to Introduce Coding to Students
Vallejo, William (BarranquillaLicenciatura en Ciencias NaturalesSede Norte, 2022-02-18)Various studies have reported the versatility and great scope of programming tools in all areas of knowledge. Coding is generally of paramount importance to chemistry students regardless of whether they intend to work with ...
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In vitro anti-leishmanial effect of metallic meso-substituted porphyrin derivatives against Leishmania braziliensis and Leishmania panamensis promastigotes properties
Espitia-Almeida, Fabian (BarranquillaSede Norte, 2020-04-19)In this study, a family of porphyrins based on 5,10,15,20-Tetrakis(4-ethylphenyl)porphyrin (1, Ph) and six metallo-derivatives (Zn2+(2, Ph-Zn), Sn4+(3, Ph-Sn), Mn2+ (4, Ph-Mn), Ni2+ (5, Ph-Ni), Al3+ (6, Ph-Al), and V3+ ...
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Methylene Blue Photodegradation under Visible Irradiation on Ag-Doped ZnO Thin Films
Vallejo, William (BarranquillaSede Norte, 2019-09-04)This study synthesized and characterized Ag-doped ZnO thin films. Doped ZnO powders were synthesized using the sol-gel method, and thin films were fabricated using the doctor blade technique. The Ag content was determined ...
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Photophysical study and in vitro approach against Leishmania panamensis of dicloro-5,10,15,20-tetrakis(4- bromophenyl)porphyrinato Sn(IV)
Espitia-Almeida, Fabián (BarranquillaSede Norte, 2021-11-08)Background: Photodynamic therapy activity against different biological systems has been reported for porphyrins. Porphyrin modifications through peripheral groups and/or by metal insertion inside the ring are main ...
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TiO2 thin films sensitization with natural dyes extracted from Bactris guineensis for photocatalytic applications: Experimental and DFT study
Diaz-Uribe, Carlos (BarranquillaQuímicaSede Norte, 2020-03-11)TiO2 thin films, sensitized by an anthocyanins-rich extract of a common species found in the Colombian Caribbean region (Bactris guineensis fruits), were used for the photocatalytic degradation of methylene blue. The ...
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Zn(II)-tetracarboxy-phthalocyanine-Sensitized TiO2 Thin Films as Antimicrobial Agents under Visible Irradiation: a Combined DFT and Experimental Study
Vallejo, William (BarranquillaQuímicaSede Norte, 2021-05-20)In this article, we studied the antimicrobial activity of TiO2 sensitized by the Zn(II)-tetracarboxy-phthalocyanine (TcPcZn) complex using TiO2-Degussa P25 as a semiconductor source. The TiO2 thin films were deposited by ...
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