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Wittmann T, Mondal A, Tschense CBL, Wittmann JJ, Klimm O, Siegel R, Corzilius B, Weber B, Kaupp M, Senker J. Probing Interactions of N-Donor Molecules with Open Metal Sites within Paramagnetic Cr-MIL-101: A Solid-State NMR Spectroscopic and Density Functional Theory Study. J Am Chem Soc 2018; 140:2135-2144. [DOI: 10.1021/jacs.7b10148] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Thomas Wittmann
- Inorganic
Chemistry III, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Arobendo Mondal
- Institute
of Chemistry, Theoretical Chemistry/Quantum Chemistry, Technical University of Berlin, Sekr. C7, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Carsten B. L. Tschense
- Inorganic
Chemistry III, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Johannes J. Wittmann
- Institute
of Physical and Theoretical Chemistry and Institute of Biophysical
Chemistry, Goethe University Frankfurt, Max-von-Laue-Straße 7-9, 60438 Frankfurt am Main, Germany
| | - Ottokar Klimm
- Inorganic
Chemistry II, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Renée Siegel
- Inorganic
Chemistry III, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Björn Corzilius
- Institute
of Physical and Theoretical Chemistry and Institute of Biophysical
Chemistry, Goethe University Frankfurt, Max-von-Laue-Straße 7-9, 60438 Frankfurt am Main, Germany
| | - Birgit Weber
- Inorganic
Chemistry II, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Martin Kaupp
- Institute
of Chemistry, Theoretical Chemistry/Quantum Chemistry, Technical University of Berlin, Sekr. C7, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Juergen Senker
- Inorganic
Chemistry III, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
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Ramos Silva M, Coutinho JT, Pereira LCJ, Martín-Ramos P, Waerenborgh JC. Synthesis, structure and physical properties of a low dimensional compound. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 172:9-13. [PMID: 27374318 DOI: 10.1016/j.saa.2016.06.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 06/20/2016] [Accepted: 06/23/2016] [Indexed: 05/25/2023]
Abstract
The crystal structure of (μ3-oxo)hexakis(cyanoacetato-κO,O')(cyanoacetato-κO)diaquatriiron(III) cyanoacetic acid shows the formation of trinuclear complexes in a hydrogen-bond network that bonds all the molecules in a 3D arrangement. For this complex, within whose clusters the whole magnetic interaction takes place, 57Fe Mössbauer spectroscopy shows that the Fe cations are in the S=5/2 state in the temperature range 2-295K. The asymmetric broadening of the absorption peaks below 80K is consistent with strong antiferromagnetic interactions between the metal spins. The magnetization measurements also show the antiferromagnetic character of the spin ensemble and an ST=1/2 magnetic ground state typical of triangular systems with similar J between Fe-Fe pairs.
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Affiliation(s)
- Manuela Ramos Silva
- CFisUC, Department of Physics, University of Coimbra, Rua Larga, P-3004-516 Coimbra, Portugal.
| | - Joana T Coutinho
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, 2695-066 Bobadela LRS, Portugal
| | - Laura C J Pereira
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, 2695-066 Bobadela LRS, Portugal
| | - Pablo Martín-Ramos
- CFisUC, Department of Physics, University of Coimbra, Rua Larga, P-3004-516 Coimbra, Portugal; Higher Polytechnic School of Huesca, University of Zaragoza, Ctra. Cuarte s/n, 22071 Huesca, Spain
| | - João C Waerenborgh
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, 2695-066 Bobadela LRS, Portugal
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A Triazolate-Supported Fe3(μ 3 -O) Core: Crystal Structure, Fluorescence, and Hirshfeld Surface Analysis. J CLUST SCI 2016. [DOI: 10.1007/s10876-016-0989-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Abstract
The crystal structure of (µ3-Oxo)-hexakis(µ2-cyanoacetato)-triaqua-tri-iron(III) nitrate pentahydrate shows that the trinuclear ferric complex has an equilateral molecular structure which is manifested in the 57Fe Mössbauer spectrum single doublet. The magnetic measurements reveal antiferromagnetic exchange interactions of –22.85 cm-1, between the metal centers, that compel the system to a total spin ground state of S = ½.
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Sameera WMC, Piñero DM, Herchel R, Sanakis Y, McGrady JE, Raptis RG, Zueva EM. A Combined Experimental and Computational Study of the Magnetic Superexchange within a Triangular (μ3-O)-Pyrazolato-FeIII3 Complex. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200206] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Piñero D, Baran P, Boca R, Herchel R, Klein M, Raptis RG, Renz F, Sanakis Y. A pyrazolate-supported Fe(3)(mu(3)-O) core: structural, spectroscopic, electrochemical, and magnetic study. Inorg Chem 2007; 46:10981-9. [PMID: 18044951 PMCID: PMC2597296 DOI: 10.1021/ic0701460] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A comparison is made between the structural, spectroscopic, electrochemical, and magnetic properties of pyrazolate versus carboxylate complexes [Fe3(mu3(mu3O)(mu-LL)6Cl3]2- containing the Fe3(mu3-O)-motif. While the Fe3(mu3-O)-cores are structurally indistinguishable in the two types of complexes, their magnetic properties deviate from the expected values as a result of a through-pyrazole contribution to the overall antiferromagnetic exchange with J1/hc = -80.1 cm(-1) and J2/hc = -72.4 cm(-1), or J1/hc = 70.6 cm(-1) and J2/hc = -80.8 cm(-1), (Hex = -J1(S1S2 + S2S3) - J2S1S3). The magnetic properties of the pyrazolate complexes are further tuned by an antisymmetric exchange interaction term.
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Affiliation(s)
- Dalice Piñero
- Department of Chemistry and the Institute of Functional Nanomaterials, University of Puerto Rico, San Juan, PR 00931-3346
| | - Peter Baran
- Department of Chemistry and the Institute of Functional Nanomaterials, University of Puerto Rico, San Juan, PR 00931-3346
| | - Roman Boca
- Department of Inorganic Chemistry, Slovak University of Technology, SK-812 37 Bratislava, Slovakia
- Department of Inorganic Chemistry, Palacký University, Křížkovského 10, CZ-77147 Olomouc, Czech Republic
| | - Radovan Herchel
- Department of Chemistry, University of SS. Cyril and Methodius, Trnava, SK-91701, Slovakia
- Department of Inorganic Chemistry, Palacký University, Křížkovského 10, CZ-77147 Olomouc, Czech Republic
| | - Michael Klein
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University, D-55099 Mainz, Germany
| | - Raphael G. Raptis
- Department of Chemistry and the Institute of Functional Nanomaterials, University of Puerto Rico, San Juan, PR 00931-3346
| | - Franz Renz
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University, D-55099 Mainz, Germany
| | - Yiannis Sanakis
- Institute of Materials Science, NCRS “Demokritos”, 15310 Aghia Paraskevi, Athens, Greece
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The combination of ascorbic acid 6-palmitate and as a catalyst for the oxidation of unsaturated lipids. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2006.07.100] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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