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  1. Article: Reduced Graphene Oxide as a Platform for the Immobilization of Amino-Cyclodextrins.

    Villalobos, Elias / Marco, José F / Yáñez, Claudia

    Micromachines

    2023  Volume 14, Issue 4

    Abstract: In the present work, we reported on a method to combine amino β-cyclodextrins (CD1) with reduced graphene oxide (obtained by the electrochemical reduction of graphene oxide, erGO) to produce a glassy carbon electrode (GCE) modified with both CD1 and erGO ...

    Abstract In the present work, we reported on a method to combine amino β-cyclodextrins (CD1) with reduced graphene oxide (obtained by the electrochemical reduction of graphene oxide, erGO) to produce a glassy carbon electrode (GCE) modified with both CD1 and erGO (CD1-erGO/GCE). This procedure avoids the use of organic solvents such as hydrazine or long reaction times and high temperatures. The material combining both CD1 and erGO (CD1-erGO/GCE) was characterized by SEM, ATR-FTIR, Raman, XPS, and electrochemical techniques. As proof-of-concept, the determination of the pesticide carbendazim was carried out. The spectroscopic measurements, especially XPS, proved that CD1 was covalently attached to the surface of the erGO/GCE electrode. The attachment of cyclodextrin at the reduced graphene oxide produced an increase in the electrochemical behavior of the electrode. The cyclodextrin-functionalized reduced graphene oxide, CD1-erGO/GCE, showed a larger sensitivity (1.01 μA/μM) and a lower limit of detection for carbendazim (LOD = 0.50 μM) compared with the non-functionalized material, erGO/GCE, (sensitivity = 0.63 μA/μM and LOD = 4.32 μM, respectively). Overall, the results of the present work show that this simple method is suitable to attach cyclodextrins to graphene oxide, maintaining their inclusion abilities.
    Language English
    Publishing date 2023-03-28
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2620864-7
    ISSN 2072-666X
    ISSN 2072-666X
    DOI 10.3390/mi14040746
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Evidence of carbon-supported porphyrins pyrolyzed for the oxygen reduction reaction keeping integrity.

    Orellana, Walter / Loyola, César Zúñiga / Marco, José F / Tasca, Federico

    Scientific reports

    2022  Volume 12, Issue 1, Page(s) 8072

    Abstract: Fe(III) 5,10,15,20-(tetraphenyl)porphyrin chloride (FeTPP) and Co(III) 5,10,15,20-(tetraphenyl)porphyrin chloride (CoTPP) were adsorbed on carbon Vulcan and studied as electrocatalysts for the oxygen reduction reaction (ORR) before and after pyrolysis. ... ...

    Abstract Fe(III) 5,10,15,20-(tetraphenyl)porphyrin chloride (FeTPP) and Co(III) 5,10,15,20-(tetraphenyl)porphyrin chloride (CoTPP) were adsorbed on carbon Vulcan and studied as electrocatalysts for the oxygen reduction reaction (ORR) before and after pyrolysis. The pyrolysis process was also simulated through ab initio molecular dynamic simulations and the minimum energy path for the O
    MeSH term(s) Carbon ; Chlorides ; Ferric Compounds/chemistry ; Oxidation-Reduction ; Oxygen/chemistry ; Porphyrins/chemistry
    Chemical Substances Chlorides ; Ferric Compounds ; Porphyrins ; Carbon (7440-44-0) ; Oxygen (S88TT14065)
    Language English
    Publishing date 2022-05-16
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-022-11820-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Obtention and Characterization of Ferrous Chloride FeCl

    Alcaraz, Lorena / Sotillo, Belén / Marco, José F / Alguacil, Francisco J / Fernández, Paloma / López, Félix A

    Materials (Basel, Switzerland)

    2021  Volume 14, Issue 17

    Abstract: As a hazardous waste, water pickling liquors must be properly treated. An alternative consists of promoting the formation of ferrous salts from this residue due to their higher ferrous content. Since ... ...

    Abstract As a hazardous waste, water pickling liquors must be properly treated. An alternative consists of promoting the formation of ferrous salts from this residue due to their higher ferrous content. Since FeCl
    Language English
    Publishing date 2021-08-26
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma14174840
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: High-Voltage Stabilization of O3-Type Layered Oxide for Sodium-Ion Batteries by Simultaneous Tin Dual Modification.

    Song, Tengfei / Chen, Lin / Gastol, Dominika / Dong, Bo / Marco, José F / Berry, Frank / Slater, Peter / Reed, Daniel / Kendrick, Emma

    Chemistry of materials : a publication of the American Chemical Society

    2022  Volume 34, Issue 9, Page(s) 4153–4165

    Abstract: O3-type layered oxide materials are considered to be a highly suitable cathode for sodium-ion batteries (NIBs) due to their appreciable specific capacity and energy density. However, rapid capacity fading caused by serious structural changes and ... ...

    Abstract O3-type layered oxide materials are considered to be a highly suitable cathode for sodium-ion batteries (NIBs) due to their appreciable specific capacity and energy density. However, rapid capacity fading caused by serious structural changes and interfacial degradation hampers their use. A novel Sn-modified O3-type layered NaNi
    Language English
    Publishing date 2022-04-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1500399-1
    ISSN 1520-5002 ; 0897-4756
    ISSN (online) 1520-5002
    ISSN 0897-4756
    DOI 10.1021/acs.chemmater.2c00522
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Two Shared Icosahedral Metallacarboranes through Iron: A Joint Experimental and Theoretical Refinement of Mössbauer Spectrum in [Fe(1,2-C

    Marco, José F / Dávalos-Prado, Juan Z / Hnyk, Drahomír / Holub, Josef / Oña, Ofelia B / Alcoba, Diego R / Ferrer, Maxime / Elguero, José / Lain, Luis / Torre, Alicia / Oliva-Enrich, Josep M

    ACS omega

    2023  Volume 8, Issue 15, Page(s) 13993–14004

    Abstract: Mössbauer and X-ray photoelectron spectroscopies (XPS) are complemented with high-level quantum-chemical computations in the study of the geometric and electronic structure of the paramagnetic salt of the metallacarborane sandwich complex [Fe(1,2- ... ...

    Abstract Mössbauer and X-ray photoelectron spectroscopies (XPS) are complemented with high-level quantum-chemical computations in the study of the geometric and electronic structure of the paramagnetic salt of the metallacarborane sandwich complex [Fe(1,2-C
    Language English
    Publishing date 2023-04-07
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.3c00422
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: New Highly Charged Iron(III) Metal-Organic Cube Stabilized by a Bulky Amine.

    Cruz, Carlos / Vega Carvallo, Andrés Igor / Spodine, Evgenia / Escuer, Albert / Marco, José F / Menéndez, Nieves / Venegas-Yazigi, Diego / Paredes-García, Verónica

    ACS omega

    2020  Volume 5, Issue 35, Page(s) 22238–22247

    Abstract: In this work, we report a new octanuclear cluster based on ... ...

    Abstract In this work, we report a new octanuclear cluster based on Fe
    Language English
    Publishing date 2020-08-14
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.0c02420
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Treatment of antibiotic cephalexin by heterogeneous electrochemical Fenton-based processes using chalcopyrite as sustainable catalyst.

    Droguett, Constanza / Salazar, Ricardo / Brillas, Enric / Sirés, Ignasi / Carlesi, Carlos / Marco, José F / Thiam, Abdoulaye

    The Science of the total environment

    2020  Volume 740, Page(s) 140154

    Abstract: The development of heterogeneous Fenton-based electrochemical advanced oxidation processes is important for the removal of organic pollutants at industrial level in the near future. This work reports the application of heterogeneous photoelectro-Fenton ( ... ...

    Abstract The development of heterogeneous Fenton-based electrochemical advanced oxidation processes is important for the removal of organic pollutants at industrial level in the near future. This work reports the application of heterogeneous photoelectro-Fenton (HPEF) with UVA light as an enhanced alternative to the more widespread heterogeneous electro-Fenton (HEF) process. The treatment of the antibiotic cephalexin using chalcopyrite as a sustainable catalyst was studied using an undivided IrO
    MeSH term(s) Anti-Bacterial Agents ; Cephalexin ; Copper ; Electrochemical Techniques ; Electrodes ; Ferric Compounds ; Hydrogen Peroxide ; Oxidation-Reduction ; Water Pollutants, Chemical/analysis
    Chemical Substances Anti-Bacterial Agents ; Ferric Compounds ; Water Pollutants, Chemical ; chalcopyrite (1308-56-1) ; Copper (789U1901C5) ; Hydrogen Peroxide (BBX060AN9V) ; Cephalexin (OBN7UDS42Y)
    Language English
    Publishing date 2020-06-11
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2020.140154
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
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  8. Article: Oxygen Reduction Reaction at Penta-Coordinated Co Phthalocyanines.

    Viera, Marco / Riquelme, Jorge / Aliaga, Carolina / Marco, José F / Orellana, Walter / Zagal, José H / Tasca, Federico

    Frontiers in chemistry

    2020  Volume 8, Page(s) 22

    Abstract: From the early 60s, Co complexes, especially Co phthalocyanines (CoPc) have been extensively studied as electrocatalysts for the oxygen reduction reaction (ORR). Generally, they promote the 2-electron reduction of ... ...

    Abstract From the early 60s, Co complexes, especially Co phthalocyanines (CoPc) have been extensively studied as electrocatalysts for the oxygen reduction reaction (ORR). Generally, they promote the 2-electron reduction of O
    Language English
    Publishing date 2020-01-29
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2711776-5
    ISSN 2296-2646
    ISSN 2296-2646
    DOI 10.3389/fchem.2020.00022
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: In search of the most active MN4 catalyst for the oxygen reduction reaction. The case of perfluorinated Fe phthalocyanine

    Abarca, Gabriel / Aliaga, Carolina / Marco, José F / Orellana, Walter / Tasca, Federico / Viera, Marco / Zagal, José H

    Journal of materials chemistry A. 2019 Nov. 5, v. 7, no. 43

    2019  

    Abstract: Iron macrocyclic complexes (MN4) are promising catalysts for replacing platinum (the industrial standard) in electrocatalysis. In particular, FeN4 complexes have shown lower overpotential than Pt for the oxygen reduction reaction (ORR) in alkaline media. ...

    Abstract Iron macrocyclic complexes (MN4) are promising catalysts for replacing platinum (the industrial standard) in electrocatalysis. In particular, FeN4 complexes have shown lower overpotential than Pt for the oxygen reduction reaction (ORR) in alkaline media. To predict the electrochemical activity of metal electrodes and molecular catalysts towards the ORR, reactivity descriptors with typical volcano correlation have been demonstrated. The most important are M–O2 binding energy and M(n)+/M(n−1)+ redox potentials for the complexes. We studied a new Fe complex, which possesses powerful electron-withdrawing fluorine residues at the periphery of the phthalocyanine ring. Fe hexadecafluorophthalocyanine (16(F)FePc) was characterized by electron paramagnetic resonance (EPR), and X-ray photoelectron spectroscopy (XPS) in the presence and in absence of O2. Experimental and calculated O2–Fe binding energies, as well as electrochemical characterization confirms the excellent activity of this complex for the ORR placing this complex at the top of the MN4 volcano correlation.
    Keywords catalysts ; catalytic activity ; electrochemistry ; electrodes ; energy ; fluorine ; iron ; oxygen ; platinum ; redox potential ; X-ray photoelectron spectroscopy
    Language English
    Dates of publication 2019-1105
    Size p. 24776-24783.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 2702232-8
    ISSN 2050-7496 ; 2050-7488
    ISSN (online) 2050-7496
    ISSN 2050-7488
    DOI 10.1039/c9ta09125d
    Database NAL-Catalogue (AGRICOLA)

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  10. Article: Reduced Graphene Oxides: Influence of the Reduction Method on the Electrocatalytic Effect towards Nucleic Acid Oxidation.

    Báez, Daniela F / Pardo, Helena / Laborda, Ignacio / Marco, José F / Yáñez, Claudia / Bollo, Soledad

    Nanomaterials (Basel, Switzerland)

    2017  Volume 7, Issue 7

    Abstract: For the first time a critical analysis of the influence that four different graphene oxide reduction methods have on the electrochemical properties of the resulting reduced graphene oxides (RGOs) is reported. Starting from the same graphene oxide, ... ...

    Abstract For the first time a critical analysis of the influence that four different graphene oxide reduction methods have on the electrochemical properties of the resulting reduced graphene oxides (RGOs) is reported. Starting from the same graphene oxide, chemical (CRGO), hydrothermal (hTRGO), electrochemical (ERGO), and thermal (TRGO) reduced graphene oxide were produced. The materials were fully characterized and the topography and electroactivity of the resulting glassy carbon modified electrodes were also evaluated. An oligonucleotide molecule was used as a model of DNA electrochemical biosensing. The results allow for the conclusion that TRGO produced the RGOs with the best electrochemical performance for oligonucleotide electroanalysis. A clear shift in the guanine oxidation peak potential to lower values (~0.100 V) and an almost two-fold increase in the current intensity were observed compared with the other RGOs. The electrocatalytic effect has a multifactorial explanation because the TRGO was the material that presented a higher polydispersity and lower sheet size, thus exposing a larger quantity of defects to the electrode surface, which produces larger physical and electrochemical areas.
    Language English
    Publishing date 2017-07-04
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano7070168
    Database MEDical Literature Analysis and Retrieval System OnLINE

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