Obtaining N-Enriched Mesoporous Carbon-Based by Means of Gamma Radiation

In this paper, we present the results of the gamma irradiation method to obtain N-doped mesoporous activated carbons. Nitrogen-enriched mesoporous carbons were prepared from three chosen commercial activated carbons such as Carbon Black OMCARB C-140, KETJENBLACK EC-600JD and PK 1-3 Norit. HRTEM, SEM, Raman spectra, elemental analysis, XPS studies and widely approved N2 adsorption–desorption measurements allowed us to evaluate the effectiveness of N atom insertion and its influence on the BET surface area and the pore structure of modified carbons. The obtained materials have an exceptionally high N content of up to 3.2 wt.%. Additionally, selected N-doped activated carbons were fully characterized to evaluate their applicability as carbon electrode materials with particular emphasis on Oxygen Reduction Reaction (ORR). The proposed method is a relatively facile, efficient and universal option that can be added to the already known methods of introducing heteroatoms to different carbons.Innovation Incubator 4.0 NCU (Poland) 5/2021 MNISW/2020/331NCU competition Mobility 4 edition project 60/2021/Mobilit

Unveiling the structural transformations of the PW11Co@ZIF-67 nanocomposite induced by thermal treatment

A guest@host POM@ZIF nanocomposite—PW11Co@ZIF-67—has been synthesized using an in situ strategy. This new nanocomposite exhibits (i) individually ZIF-67-cage-confined POM units, (ii) structural defects in the ZIF-67 host induced by the POM, and (iii) charge transfer from the ZIF-67 to the confined POM. In addition, it has served as a template to produce a set of derived samples by applying thermal treatment at various temperatures (200, 400, 500, 600, and 950 °C) under a N2 flow. We have used multiple characterization techniques, ICP-OES, CHNS analysis, XPS, ATR-IR, PXRD, Raman spectroscopy, N2/ CO2 adsorption analysis, CV, and TEM/EDS, to fully assess the thermally-induced variation tendencies. The first two derivatives—D200 and D400—show the same nanoarrangement as the PW11Co@ZIF-67 precursor, although with incipient signs of both POM and ZIF-67 structural decompositions. The following samples—D500, D600, and D950—exhibit a carbonaceous nature consisting of C-embedded compositionally complex nanoparticles that involve Co and W present as diverse species, metallic/oxide/phosphate/ phosphide. D500 presents the best intrinsic electrochemistry, probably due to the high proportion of pyridinic N moieties doping its C matrix combined with small-sized and highly dispersed Co-enriched nanoparticles. This study focuses on the need for a thorough physicochemical characterization of this class of highly nanostructured materials with a view to exploring their application in electrocatalysis.Portuguese Foundation for Science and Technology POCI-01-0145-FEDER-016422European CommissionPortuguese Foundation for Science and TechnologyEuropean Commission UIDB/50006/2020 UIDP/50006/2020 2021.00771.CEECIND/CP1662/CT0007 CEECIND/03877/2018 CEECIND/00793/201

Adsorptive Capacity, Inhibitory Activity and Processing Techniques for a Copper-MOF Based on the 3,4-Dihydroxybenzoate Ligand

Supplementary Materials: The following supporting information can be downloaded at: https://www.mdpi.com/article/10.3390/molecules27228073/s1Acknowledgments: E.E. is grateful to the Government of the Basque Country for the predoctoral fellowship and R.F.M for the Junior Research Position CEECIND/ 00553/2017. S.R. acknowledges the Juan de la Cierva Incorporación Fellowship (grant agreement no. IJC2019-038894-I). The authors thank for technical and human support provided by SGIker of UPV/EHU and European funding (ERDF and ESF) and also wish to acknowledge the terrific help of all reviewers of the present manuscript, whose comments helped to improve the quality of the work.Funding: This work was developed within the scope of the projects given by the University of the Basque Country (GIU 20/028 Junta de Andalucía (B-FQM-734-UGR20, ProyExcel_00386 and FQM-394), the Spanish Ministry of Science, Innovation and Universities (MCIU/AEI/FEDER, UE) (PGC2018-102052-B-C21) and the CICECO-Aveiro Institute of Materials (UIDB/50011/2020 and UIDP/50011/2020).Due to the fast, emerging development of antibiotic-resistant bacteria, the need for novel, efficient routes to battle these pathogens is crucial; in this scenario, metal-organic frameworks (MOFs) are promising materials for combating them effectively. Herein, a novel Cu-MOF—namely 1—that displays the formula [Cu3L2(DMF)2]n (DMF = N,N-dimethylformamide) is described, synthesized by the combination of copper(II) and 3,4-dihydroxybenzoic acid (H3L)—both having well-known antibacterial properties. The resulting three-dimensional structure motivated us to study the antibacterial activity, adsorptive capacity and processability of the MOF in the form of pellets and membranes as a proof-of-concept to evaluate its future application in devices.Government of the Basque Country for the predoctoral fellowship and R.F.M for the Junior Research Position CEECIND/00553/2017Juan de la Cierva Incorporación Fellowship (grant agreement no. IJC2019-038894-I)SGIker of UPV/EHUEuropean funding (ERDF and ESF)University of the Basque Country (GIU 20/028 Junta de Andalucía (B-FQM-734-UGR20, ProyExcel_00386 and FQM-394)Spanish Ministry of Science, Innovation and Universities (MCIU/AEI/FEDER, UE) (PGC2018-102052-B-C21)CICECO-Aveiro Institute of Materials (UIDB/50011/2020 and UIDP/50011/2020

Metal−Organic Frameworks Based on a Janus-Head Biquinoline Ligand as Catalysts in the Transformation of Carbonyl Compounds into Cyanohydrins and Alcohols

A new family of metal−organic frameworks (MOFs) named GR-MOFs with the chemical formula {[Mx(BCA)y]- (H2O)z(DMF)w} (x,y,z,w: 1,1,2,0; 1,1.5,0,1; 1,2,2,1; and 1,1,0,2 for GR-MOF-11 to 14, respectively) based on s-block [M: Sr (GRMOF- 11), Ba (GR-MOF-14)] and d-block [M: Y (GR-MOF-12) and Cd (GR-MOF-13)] metals together with the biquinoline ligand 2,2′-bicinchoninic acid (H2BCA) has been synthetized by a solvothermal route and fully characterized by elemental and thermogravimetric analysis, Fourier transform infrared spectroscopy, photoluminescence, particle size distribution through optical microscopy, electrophoretic mobility, and finally, X-ray singlecrystal and powder diffraction. The structural characterization reveals that these 2D and 3D MOFs possess a rich variety of coordination modes that maintained the Janus-head topology on the ligand in most of the cases. The new MOFs were studied in the catalyzed cyanosilylation and hydroboration of an extensive group of aldehydes and ketones, wherein the s-block metal-based MOFs GR-MOF-11 and GR-MOF-14 provided the highest efficiency ever reported in the MOF-catalyzed cyanosilylation of carbonyl compounds by using only 0.5 mol % of catalyst loading, room temperature, and solvent-free conditions. Furthermore, the hydroboration of ketones has been reported for the first time with this type of s-block metal catalysts obtaining from moderate to good conversions.MCIN/AEI CTQ2017-84334 R PGC2018-102052 B-C21 PGC2018-102052 A-C22ERDF A way of making EuropeJunta de Andalucia 102C2000004 CV20-78799 P20_01041UAL-FEDER UAL2020-AGR-B1781FEDER 2014-2020 A-RNM-433-UGR18ProyExcel_00386 ProyExcel_00105B-FQM-734-UGR20 FQM-376 FQM-394Basque Government IT1755-22 IT1500-22Gobierno de Espana MCIN/AEI PDC2021-121248-I00 PLEC2021-007774Juan de la Cierva Incorporacion Fellowship IJC2019-038894-IHipatia fellowship (University of Almeria)Universidad de Granada/CBU

Adsorptive Capacity, Inhibitory Activity and Processing Techniques for a Copper-MOF Based on the 3,4-Dihydroxybenzoate Ligand

Due to the fast, emerging development of antibiotic-resistant bacteria, the need for novel, efficient routes to battle these pathogens is crucial; in this scenario, metal-organic frameworks (MOFs) are promising materials for combating them effectively. Herein, a novel Cu-MOF—namely 1—that displays the formula [Cu3L2(DMF)2]n (DMF = N,N-dimethylformamide) is described, synthesized by the combination of copper(II) and 3,4-dihydroxybenzoic acid (H3L)—both having well-known antibacterial properties. The resulting three-dimensional structure motivated us to study the antibacterial activity, adsorptive capacity and processability of the MOF in the form of pellets and membranes as a proof-of-concept to evaluate its future application in devices.This work was developed within the scope of the projects given by the University of the Basque Country (GIU 20/028 Junta de Andalucía (B-FQM-734-UGR20, ProyExcel_00386 and FQM-394), the Spanish Ministry of Science, Innovation and Universities (MCIU/AEI/FEDER, UE) (PGC2018-102052-B-C21) and the CICECO−Aveiro Institute of Materials (UIDB/50011/2020 and UIDP/50011/2020)

Hyperbranched structures on carbon nanotubes to obtain supported metal nanoparticles: Attachment by means of halogenated functions and direct functionalization

The aim of the work is the functionalization of multi-wall carbon nanotubes (MWCNTs) with hyperbranched polyethyleneimines (HBPEIs) to capture metal ions which, after reduction, result in metal nanoparticles (MNPs) supported on the nanotubes. These metal nanoparticle/MWCNT hybrids have large interest as they can be used in heterogeneous catalysis, fuel cells, hydrogen storage as well as for the fabrication of chemical/biosensors. Moreover, reaching the objective of this work allows us to get insight into the control and understanding of the methodologies for the CNTs covalent bonding and also for the characterization of the materials.Tesis Univ. Granada. Departamento Química InorgánicaBeca predoctoral de Formación de Personal de Investigación, FPI, para la realización del doctorado. Y por la financiación del proyecto MAT2009-14185-C02-01: Tratamientos de CNTs y CBs mediante plasmas para su funcionalización con estructuras hiperramificadas

Hyperbranched structures on carbon nanotubes to obtain supported metal nanoparticles: Attachment by means of halogenated functions and direct functionalization

The aim of the work is the functionalization of multi-wall carbon nanotubes (MWCNTs) with hyperbranched polyethyleneimines (HBPEIs) to capture metal ions which, after reduction, result in metal nanoparticles (MNPs) supported on the nanotubes. These metal nanoparticle/MWCNT hybrids have large interest as they can be used in heterogeneous catalysis, fuel cells, hydrogen storage as well as for the fabrication of chemical/biosensors. Moreover, reaching the objective of this work allows us to get insight into the control and understanding of the methodologies for the CNTs covalent bonding and also for the characterization of the materials.Tesis Univ. Granada. Departamento Química InorgánicaBeca predoctoral de Formación de Personal de Investigación, FPI, para la realización del doctorado. Y por la financiación del proyecto MAT2009-14185-C02-01: Tratamientos de CNTs y CBs mediante plasmas para su funcionalización con estructuras hiperramificadas