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Adhikari S, Sheikh AH, Kansız S, Dege N, Baildya N, Mahmoudi G, Choudhury NA, Butcher RJ, Kaminsky W, Talledo S, Lopato EM, Bernhard S, Kłak J. Supramolecular Co(II) Complexes Based on Dithiolate and Dicarboxylate Ligands: Crystal structures, Theoretical studies, Magnetic Properties, and Catalytic Activity Studies in Photocatalytic Hydrogen Evolution. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
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Gil-Hernández B, Millan S, Gruber I, Quirós M, Marrero-López D, Janiak C, Sanchiz J. Improvement of the Proton Conduction of Copper(II)-Mesoxalate Metal-Organic Frameworks by Strategic Selection of the Counterions. Inorg Chem 2022; 61:11651-11666. [PMID: 35838657 PMCID: PMC9377511 DOI: 10.1021/acs.inorgchem.2c01241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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Three copper(II)/mesoxalate-based MOFs with formulas
(H3O)[Cu9(Hmesox)6(H2O)6Cl]·8H2O (1), (NH2Me2)0.4(H3O)0.6[Cu9(Hmesox)6(H2O)6Cl]·8H2O (2), and (enH2)0.25(enH)1.5[Cu6(Hmesox)3(mesox)(H2O)6Cl0.5]Cl0.5·5.25H2O (3) were synthesized (H4mesox = mesoxalic
acid = 2,2-dihydroxypropanedioic acid, en = ethylenediamine). Essentially,
all of the compounds display the same anionic network with a different
arrangement of the cations, which have a remarkable effect on the
proton conduction of the materials, ranging from 1.16 × 10–4 S cm–1 for 1 to 1.87
× 10–3 S cm–1 for 3 (at 80 °C and 95% RH). These compounds also display antiferromagnetic
coupling among the copper(II) ions through both the carboxylate and
alkoxido bridges. The values of the principal magnetic coupling constants
were calculated by density functional theory (DFT), leading to congruent
values that confirm the predominant antiferromagnetic nature of the
interactions. Three copper(II)-mesoxalate
metal−organic frameworks
were synthesized in the presence of three different cations: hydronium,
dimethylammonium, and ethylenediammonium, which neutralize the charge
of the anionic networks. Besides the crystallographic characterization
and the investigation of the magnetic properties, the compounds show
varying proton conductivities depending on the included cations. The
proton conductivity increases 1 order of magnitude in the case of
compound 3 (1.87 × 10−3 S cm−1 at 80 °C and 95% RH), which contains ethylenediammonium
cations.
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Affiliation(s)
- Beatriz Gil-Hernández
- Departamento de Química, Facultad de Ciencias, Sección Química, Universidad de La Laguna, La Laguna 38206, Tenerife, Spain.,Institute of Materials and Nanotechnology, Universidad de La Laguna, P.O. Box 456, La Laguna E-38200, Tenerife, Spain
| | - Simon Millan
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine Universität Düsseldorf, 40204 Düsseldorf, Germany
| | - Irina Gruber
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine Universität Düsseldorf, 40204 Düsseldorf, Germany
| | - Miguel Quirós
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
| | - David Marrero-López
- Departamento de Física Aplicada I, Universidad de Málaga, Campus Teatinos s/n, 29071 Málaga, Spain
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine Universität Düsseldorf, 40204 Düsseldorf, Germany
| | - Joaquín Sanchiz
- Departamento de Química, Facultad de Ciencias, Sección Química, Universidad de La Laguna, La Laguna 38206, Tenerife, Spain.,Institute of Materials and Nanotechnology, Universidad de La Laguna, P.O. Box 456, La Laguna E-38200, Tenerife, Spain
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