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Pérez AL, Kemmerer A, Zapata AJ, Sartoris R, Gonzalez PJ, Urteaga R, Baggio R, Suarez S, Ramos CA, Dalosto SD, Rizzi AC, Brondino CD. Synthesis, structure, and characterisation of a ferromagnetically coupled dinuclear complex containing Co(II) ions in a high spin configuration and thiodiacetate and phenanthroline as ligands and of a series of isomorphous heterodinuclear complexes containing different Co : Zn ratios. Dalton Trans 2023; 52:14595-14605. [PMID: 37786344 DOI: 10.1039/d3dt02115g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
We report the synthesis, crystal structure, and characterisation of a dinuclear Co(II) compound with thiodiacetate (tda) and phenanthroline (phen) as ligands (1), and of a series of metal complexes isomorphous to 1 with different Co : Zn ratios (2, 4 : 1; 3, 1 : 1; 4, 1 : 4; 5, 1 : 10). General characterisation methodologies and X-ray data showed that all the synthesised complexes are isomorphous to Zn(II) and Cu(II) analogues (CSD codes: DUHXEL and BEBQII). 1 consists of centrosymmetric Co(II) ion dimers in which the ions are 3.214 Å apart, linked by two μ-O bridges. Each cobalt atom is in a distorted octahedral environment of the N2O3S type. UV-vis spectra of 1 and 5 are in line with high spin (S = 3/2) Co(II) ions in octahedral coordination and indicate that the electronic structure of both Co(II) ions in the dinuclear unit does not significantly change relative to that of the magnetically isolated Co(II) ion. EPR spectra of powder samples of 5 (Co : Zn ratio of 1 : 10) together with spectral simulation indicated high spin Co(II) ions with high rhombic distortion of the zfs [E/D = 0.31(1), D > 0]. DC magnetic susceptibility experiments on 1 and analysis of the data constraining the E/D value obtained by EPR yielded g = 2.595(7), |D| = 61(1) cm-1, and an intradimer ferromagnetic exchange coupling of J = 1.39(4) cm-1. EPR spectra as a function of Co : Zn ratio for both powder and single crystal samples confirmed that they result from two effective S' = 1/2 spins that interact through dipolar and isotropic exchange interactions to yield magnetically isolated S' = 1 centres and that interdimeric exchange interactions, putatively mediated by hydrophobic interactions between phen moieties, are negligible. The latter observation contrasts with that observed in the Cu(II) analogue, where a transition from S = 1 to S' = 1/2 was observed. Computational calculations indicated that the absence of the interdimeric exchange interaction in 1 is due to a lower Co(II) ion spin density delocalisation towards the metal ligands.
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Affiliation(s)
- Ana L Pérez
- Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral and CONICET, Ciudad Universitaria, S3000ZAA Santa Fe, Argentina.
- Instituto de Física del Litoral, Universidad Nacional del Litoral - CONICET, Güemes 3450, 3000 Santa Fe, Argentina
| | - Axel Kemmerer
- Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral and CONICET, Ciudad Universitaria, S3000ZAA Santa Fe, Argentina.
| | - Alejandro J Zapata
- Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral and CONICET, Ciudad Universitaria, S3000ZAA Santa Fe, Argentina.
| | - Rosana Sartoris
- Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral and CONICET, Ciudad Universitaria, S3000ZAA Santa Fe, Argentina.
| | - Pablo J Gonzalez
- Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral and CONICET, Ciudad Universitaria, S3000ZAA Santa Fe, Argentina.
| | - Raul Urteaga
- Instituto de Física del Litoral, Universidad Nacional del Litoral - CONICET, Güemes 3450, 3000 Santa Fe, Argentina
- Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santiago del Estero 2829, 3000 Santa Fe, Argentina
| | - Ricardo Baggio
- Gerencia de Investigación y Aplicaciones, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Buenos Aires, Argentina
| | - Sebastián Suarez
- Gerencia de Investigación y Aplicaciones, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Buenos Aires, Argentina
| | - Carlos A Ramos
- Instituto de Nanociencia y Nanotecnología, CNEA-CONICET, Centro Atómico Bariloche, 8400, San Carlos de Bariloche, Río Negro, Argentina
| | - Sergio D Dalosto
- Instituto de Física del Litoral, Universidad Nacional del Litoral - CONICET, Güemes 3450, 3000 Santa Fe, Argentina
- Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santiago del Estero 2829, 3000 Santa Fe, Argentina
| | - Alberto C Rizzi
- Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral and CONICET, Ciudad Universitaria, S3000ZAA Santa Fe, Argentina.
| | - Carlos D Brondino
- Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral and CONICET, Ciudad Universitaria, S3000ZAA Santa Fe, Argentina.
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2
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Kharwar AK, Mondal A, Sarkar A, Rajaraman G, Konar S. Modulation of Magnetic Anisotropy and Exchange Interaction in Phenoxide-Bridged Dinuclear Co(II) Complexes. Inorg Chem 2021; 60:11948-11956. [PMID: 34314144 DOI: 10.1021/acs.inorgchem.1c00956] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a new class of four dimeric Co(II) complexes [Co2(bbpen)(X)2] (H2bbpen = N,N'-bis(2-hydroxybenzyl)-N,N'-bis(2-methylpyridyl)ethylenediamine) [X- = SCN (1), Cl (2), Br (3), and I (4)] with different coordination geometry of two Co(II) centers (trigonal-prismatic and pseudo-tetrahedral) and their magnetic study. Interestingly, the two Co(II) centers show two different types of magnetic anisotropy. State of the art ab initio CASSCF analysis reveals that the six-coordinate or the trigonal-prismatic Co(II) center possesses a consistently large negative axial zero-field splitting (negative D) parameter (∼-60 cm-1), while the four-coordinate or the pseudo-tetrahedral Co(II) center exhibits a range of D values from +13 to -23 cm-1. Ab initio calculations employing the lines model were used to estimate the magnetic exchange as both the Co(II) centers possess significant magnetic anisotropy. All the complexes display rare ferromagnetic interaction, and the strength of this interaction decreases as the ligand field on the pseudo-tetrahedral Co(II) center decreases from SCN- > Cl- > Br- > I-.
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Affiliation(s)
- Ajit Kumar Kharwar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Bhopal, Bypass Road, Bhauri, Bhopal 462066, India
| | - Arpan Mondal
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Bhopal, Bypass Road, Bhauri, Bhopal 462066, India
| | - Arup Sarkar
- Department of Chemistry, Indian Institute of Technology, Bombay, Powai, Mumbai 400076, India
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology, Bombay, Powai, Mumbai 400076, India
| | - Sanjit Konar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Bhopal, Bypass Road, Bhauri, Bhopal 462066, India
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3
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Cabrosi D, Cruz C, Paredes-García V, Alborés P. Anisotropic exchange interaction and field-induced SMM behaviour in a mixed valence {CoCo} complex. Dalton Trans 2021; 50:1402-1412. [PMID: 33433551 DOI: 10.1039/d0dt03075a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We are reporting the synthesis and structural characterization of a new hexanuclear Co(ii)/Co(iii) complex starting from a versatile pivalate cobalt precursor and the racemic mixture of a chelating Schiff base type ligand. The main [CoII4CoIII2(μ3-OH)2(μ-OR)2(μ-OR')2(μ-OR'')2]6+ core is unprecedented and exhibits an inversion center that affords only two unique Co(ii) sites. We performed DC and AC magnetic measurements and analysed them in terms of the anisotropic exchange of ground Kramers doublets at each Co(ii) site due to their unquenched angular orbital contribution to the magnetic moment. Quantum computations support the experimental data treatment. The interplay of dominant antiferromagnetic exchange, inversion symmetry and a non-collinear main quantization axis affords an exchange energy spectrum with mostly non-magnetic states. Nevertheless, field induced SMM behaviour is observed at 1500 Oe and below 3 K which might be explained by the relaxation of the first excited magnetic state (which is populated enough) through the next closest excited state. The Orbach and/or Raman mechanism could be operative from the experimental and quantum computed results.
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Affiliation(s)
- Daiana Cabrosi
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE (CONICET), Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.
| | - Carlos Cruz
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Avenida República 275, Santiago de Chile, Chile and Centro para el Desarrollo de la Nanociencia y Nanotecnología, CEDENNA, Santiago, Chile
| | - Verónica Paredes-García
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Avenida República 275, Santiago de Chile, Chile and Centro para el Desarrollo de la Nanociencia y Nanotecnología, CEDENNA, Santiago, Chile
| | - Pablo Alborés
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE (CONICET), Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.
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4
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Yao XQ, Wang XH, Yan PJ, Zhang MD. A multifunctional pseudo-polyrotaxane coordination polymer based on the trinuclear cluster [Co3(COO−)4(OH−)2]: Synthesis, structure and properties. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Pérez AL, Kemmerer A, Rey MA, Dalosto SD, Ramos CA, Passeggi MCG, Rizzi AC, Brondino CD. Coupled High Spin Co
II
Ions Linked by Symmetrical Double Hydrogen Bonds: Role of a Slowly Relaxing Cu
II
Impurity in Interrupting the Co
II
–Co
II
Exchange Interaction. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ana L. Pérez
- Departamento de Física Facultad de Bioquímica y Ciencias Biológicas Universidad Nacional del Litoral ‐ CONICET Ciudad Universitaria S3000ZAA Santa Fe Argentina
| | - Axel Kemmerer
- Departamento de Física Facultad de Bioquímica y Ciencias Biológicas Universidad Nacional del Litoral ‐ CONICET Ciudad Universitaria S3000ZAA Santa Fe Argentina
| | - Marilin A. Rey
- Departamento de Física Facultad de Bioquímica y Ciencias Biológicas Universidad Nacional del Litoral ‐ CONICET Ciudad Universitaria S3000ZAA Santa Fe Argentina
| | - Sergio D. Dalosto
- Instituto de Física del Litoral Universidad Nacional del Litoral ‐ CONICET Güemes 3450 3000 Santa Fe Argentina
| | - Carlos A. Ramos
- Centro Atómico Bariloche Comisión Nacional de Energía Atómica Av. Bustillo 9500 8400 Bariloche Río Negro Argentina
| | - Mario C. G. Passeggi
- Departamento de Física Facultad de Bioquímica y Ciencias Biológicas Universidad Nacional del Litoral ‐ CONICET Ciudad Universitaria S3000ZAA Santa Fe Argentina
- Instituto de Física del Litoral Universidad Nacional del Litoral ‐ CONICET Güemes 3450 3000 Santa Fe Argentina
| | - Alberto C. Rizzi
- Departamento de Física Facultad de Bioquímica y Ciencias Biológicas Universidad Nacional del Litoral ‐ CONICET Ciudad Universitaria S3000ZAA Santa Fe Argentina
| | - Carlos D. Brondino
- Departamento de Física Facultad de Bioquímica y Ciencias Biológicas Universidad Nacional del Litoral ‐ CONICET Ciudad Universitaria S3000ZAA Santa Fe Argentina
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6
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Assembly of a new (3,6)-connected cobalt(II) metal–organic framework via a mixed ligands approach. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.11.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Plaul D, Böhme M, Ostrovsky S, Tomkowicz Z, Görls H, Haase W, Plass W. Modeling Spin Interactions in a Triangular Cobalt(II) Complex with Triaminoguanidine Ligand Framework: Synthesis, Structure, and Magnetic Properties. Inorg Chem 2017; 57:106-119. [DOI: 10.1021/acs.inorgchem.7b02229] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniel Plaul
- Institut für
Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Michael Böhme
- Institut für
Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Serghei Ostrovsky
- Institute of Applied Physics, Academy of Sciences of Moldova, Academiei str.5, MD-2028, Chisinau, Moldova
| | - Zbigniew Tomkowicz
- Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Krakow, Poland
| | - Helmar Görls
- Institut für
Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Wolfgang Haase
- Eduard-Zintl-Institute
of Inorganic and Physical Chemistry, Darmstadt University of Technology, Alarich-Weiss-Str. 4, 64287 Darmstadt, Germany
| | - Winfried Plass
- Institut für
Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstr. 8, 07743 Jena, Germany
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8
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Peters GM, Winegrad JB, Gau MR, Imler GH, Xu B, Ren S, Wayland BB, Zdilla MJ. Synthesis and Structure of 2,5-Bis[N-(2,6-mesityl)iminomethyl]pyrrolylcobalt(II): Evidence for One-Electron-Oxidized, Redox Noninnocent Ligand Behavior. Inorg Chem 2017; 56:3377-3385. [DOI: 10.1021/acs.inorgchem.6b02898] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Garvin M. Peters
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Jacob B. Winegrad
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Michael R. Gau
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Gregory H. Imler
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Beibei Xu
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Shenqiang Ren
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Bradford B. Wayland
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Michael J. Zdilla
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
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9
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Ostrovsky SM, Tomkowicz Z, Haase W. A magnetooptical study of (4-(2-dibutylaminoethanolato-N,O,O,O) chlorido copper(II)): a cubane complex with dominant ferromagnetic interactions. Phys Chem Chem Phys 2015; 17:30037-44. [PMID: 26510129 DOI: 10.1039/c5cp05836h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper reports the experimental and theoretical study of a tetranuclear (CuClOCH2CH2N(C4H9)2)4 complex. Analysis of the magnetic circular dichroism spectrum was performed based on the Hamiltonian that includes the crystal field of the nearest ligands and the spin-orbit interaction. The crystal field parameters were evaluated in the framework of the exchange charge model that accounts for the exchange and covalence effects. The values of the crystal field parameters obtained during the analysis of the magnetic circular dichroism spectrum were used for the calculation of the principal values and the directions of the principal axes of the local g-tensors and for the simulation of both temperature dependence of the magnetic susceptibility and field dependence of the magnetization. The value of the exchange parameter (Jex = 30 cm(-1)) was obtained. It was demonstrated that the description of the low temperature magnetic properties requires taking into account the intercluster interaction.
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Affiliation(s)
- Serghei M Ostrovsky
- Institute of Applied Physics, Academy of Sciences of Moldova, Academy str. 5, MD-2028 Chisinau, Moldova.
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10
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Kozlevčar B, Jakomin K, Počkaj M, Jagličić Z, Beyer A, Burzlaff N, Kitanovski N. Dinuclear Nitrato Coordination Compounds with Bis(3,5-tert-butylpyrazol-1-yl)acetate. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500368] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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11
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Preparation and characterization of di-(μ2-CH3COO-κ2O:O′)-tetrakis[μ3-methoxo-2,4-pentanedionatometal(II,III)] complexes. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Use of magnetic circular dichroism to study dinuclear metallohydrolases and the corresponding biomimetics. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2015; 44:393-415. [DOI: 10.1007/s00249-015-1053-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2015] [Revised: 05/30/2015] [Accepted: 06/07/2015] [Indexed: 11/26/2022]
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13
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14
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Funes AV, Carrella L, Sorace L, Rentschler E, Alborés P. Switching nuclearity and Co(ii) content through stoichiometry adjustment: {CoII6CoIII3} and {CoIICo4III} mixed valent complexes and a study of their magnetic properties. Dalton Trans 2015; 44:2390-400. [DOI: 10.1039/c4dt03034f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Controlling the CoII content in polynuclear systems: {CoII6CoIII3} and {CoIICo4III} mixed valent complexes with distinct magnetic behaviours is reported.
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Affiliation(s)
- Alejandro V. Funes
- Departamento de Química Inorgánica
- Analítica y Química Física/INQUIMAE (CONICET)
- Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires
- C1428EHA Buenos Aires
- Argentina
| | - Luca Carrella
- Institute of Inorganic and Analytical Chemistry
- Johannes Gutenberg - University of Mainz
- Mainz
- Germany
| | - Lorenzo Sorace
- Dipartimento di Chimica “U. Schiff” and UdR INSTM
- Università di Firenze
- Sesto Fiorentino
- Italy
| | - Eva Rentschler
- Institute of Inorganic and Analytical Chemistry
- Johannes Gutenberg - University of Mainz
- Mainz
- Germany
| | - Pablo Alborés
- Departamento de Química Inorgánica
- Analítica y Química Física/INQUIMAE (CONICET)
- Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires
- C1428EHA Buenos Aires
- Argentina
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15
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Tirfoin R, Chamoreau LM, Li Y, Fleury B, Lisnard L, Journaux Y. Synthesis, structure and magnetic properties of phenylhydroxamate-based coordination clusters. Dalton Trans 2014; 43:16805-17. [PMID: 25287754 DOI: 10.1039/c4dt02405b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The strategic recombination of preformed coordination clusters in the presence of polymodal bridging ligands has successfully led to the characterisation of five new compounds of structural and magnetic interest. Indeed using the dinuclear complex [M2(H2O)(piv)4(Hpiv)4] (M = Co, Ni; Hpiv = pivalic acid) as starting material and reacting it with phenylhydroxamic acid (H2pha) has yielded the four tetrametallic coordination clusters [Co4(Hpha)2(piv)6(Hpiv)4] (1), [Ni4(Hpha)2(piv)6(Hpiv)2(DMF)2] (2), [Co4(Hpha)2(piv)6(EtOH)2(H2O)2] (3), [Ni4(Hpha)2(piv)6(EtOH)2(H2O)2] (4) and the hexanuclear complex [Co6(Hpha)4(piv)8(EtOH)2]·EtOH (5). All the compounds have been structurally characterised revealing a particular binding mode for the hydroxamate ligand. The study of their magnetic properties has been performed and the modelling of these properties has been done using the appropriate hamiltonians for each compound. The experimental data and their modelling show non-zero spin ground states for compounds 4 and 5.
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Affiliation(s)
- Rémi Tirfoin
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8232, Institut Parisien de Chimie Moléculaire, F-75005 Paris, France.
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16
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Zou JY, Shi W, Zhang JY, He YF, Gao HL, Cui JZ, Cheng P. Alkaline cation directed structural diversity of cubic-cage-based cobalt(ii) metal–organic frameworks: from pcu to bct net. CrystEngComm 2014. [DOI: 10.1039/c4ce00597j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Lazzarini IC, Funes AV, Carrella L, Sorace L, Rentschler E, Alborés P. Magnetic Study of a Pentanuclear {Co2IIICo3II} Cluster with a Bent {CoII3} Motif. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402089] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Neuman NI, Winkler E, Peña O, Passeggi MCG, Rizzi AC, Brondino CD. Magnetic properties of weakly exchange-coupled high spin Co(II) ions in pseudooctahedral coordination evaluated by single crystal X-band EPR spectroscopy and magnetic measurements. Inorg Chem 2014; 53:2535-44. [PMID: 24528370 DOI: 10.1021/ic402797t] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
We report single-crystal X-band EPR and magnetic measurements of the coordination polymer catena-(trans-(μ2-fumarato)tetraaquacobalt(II)), 1, and the Co(II)-doped Zn(II) analogue, 2, in different Zn:Co ratios. 1 presents two magnetically inequivalent high spin S = 3/2 Co(II) ions per unit cell, named A and B, in a distorted octahedral environment coordinated to four water oxygen atoms and trans coordinated to two carboxylic oxygen atoms from the fumarate anions, in which the Co(II) ions are linked by hydrogen bonds and fumarate molecules. Magnetic susceptibility and magnetization measurements of 1 indicate weak antiferromagnetic exchange interactions between the S = 3/2 spins of the Co(II) ions in the crystal lattice. Oriented single crystal EPR experiments of 1 and 2 were used to evaluate the molecular g-tensor and the different exchange coupling constants between the Co(II) ions, assuming an effective spin S′= 1/2. Unexpectedly, the eigenvectors of the molecular g-tensor were not lying along any preferential bond direction, indicating that, in high spin Co(II) ions in roughly octahedral geometry with approximately axial EPR signals, the presence of molecular pseudo axes in the metal site does not determine preferential directions for the molecular g-tensor. The EPR experiment and magnetic measurements, together with a theoretical analysis relating the coupling constants obtained from both techniques, allowed us to evaluate selectively the exchange coupling constant associated with hydrogen bonds that connect magnetically inequivalent Co(II) ions (|JAB(1/2)| = 0.055(2) cm(–1)) and the exchange coupling constant associated with a fumarate bridge connecting equivalent Co(II) ions (|JAA(1/2)| ≈ 0.25 (1) cm(–1)), in good agreement with the average J(3/2) value determined from magnetic measurements.
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Affiliation(s)
- Nicolás I Neuman
- Departamento de Física, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral , S3000ZAA Santa Fe, Argentina
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19
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Murphy MJ, Usov PM, Rizzuto FJ, Kepert CJ, D'Alessandro DM. Magnetic, electrochemical and optical properties of a sulfate-bridged Co(ii) imidazole dimer. NEW J CHEM 2014. [DOI: 10.1039/c4nj01401d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electrochemical, optical and magnetic properties of a sulfate-bridged high spin Co(ii) dimer, [Co2(DMIM)4(μ2-O2,O,O′-SO4)2]·2MeCN are reported. Antiferromagnetic coupling across the μ2-(O2-sulfato) bridging mode has been identified with J = −28 cm−1.
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Affiliation(s)
| | - Pavel M. Usov
- School of Chemistry
- the University of Sydney
- NSW, Australia
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20
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Chibotaru LF. Ab InitioMethodology for Pseudospin Hamiltonians of Anisotropic Magnetic Complexes. ADVANCES IN CHEMICAL PHYSICS 2013. [DOI: 10.1002/9781118571767.ch6] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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21
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Daumann LJ, Comba P, Larrabee JA, Schenk G, Stranger R, Cavigliasso G, Gahan LR. Synthesis, Magnetic Properties, and Phosphoesterase Activity of Dinuclear Cobalt(II) Complexes. Inorg Chem 2013; 52:2029-43. [DOI: 10.1021/ic302418x] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Lena J. Daumann
- School of
Chemistry and Molecular Biosciences, The University of Queensland, Brisbane QLD 4072, Australia
| | - Peter Comba
- Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld
270, 69120 Heidelberg, Germany
| | - James A. Larrabee
- Department of Chemistry and Biochemistry, Middlebury College, Middlebury, Vermont 05753, United States
| | - Gerhard Schenk
- School of
Chemistry and Molecular Biosciences, The University of Queensland, Brisbane QLD 4072, Australia
- Department of Chemistry, National University of Ireland—Maynooth, Maynooth,
Co. Kildare, Ireland
| | - Robert Stranger
- Research School of Chemistry, Australian National University, Canberra 0200, Australia
| | - German Cavigliasso
- Research School of Chemistry, Australian National University, Canberra 0200, Australia
| | - Lawrence R. Gahan
- School of
Chemistry and Molecular Biosciences, The University of Queensland, Brisbane QLD 4072, Australia
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22
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Novel polynuclear architectures incorporating Co2+ and K+ ions bound by dimethylmalonate anions: Synthesis, structure, and magnetic properties. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2012.10.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Tomkowicz Z, Ostrovsky S, Foro S, Calvo-Perez V, Haase W. Magnetooptical and Structural Investigations of Five Dimeric Cobalt(II) Complexes Mimicking Metalloenzyme Active Sites. Inorg Chem 2012; 51:6046-55. [DOI: 10.1021/ic202529p] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Z. Tomkowicz
- Eduard-Zintl-Institute
of Inorganic and Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, 64287
Darmstadt, Germany
- Institute of Physics, Jagiellonian University, Reymonta 4,
30-059 Kraków, Poland
| | - S. Ostrovsky
- Eduard-Zintl-Institute
of Inorganic and Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, 64287
Darmstadt, Germany
- Institute of Applied
Physics, Academy of Sciences of Moldova, Academy str. 5, MD-2028 Chisinau, Moldova
| | - S. Foro
- Clemens-Schoepf-Institute
of Organic Chemistry and Biochemistry, Darmstadt University of Technology, Petersenstrasse 23, 64287
Darmstadt, Germany
| | - V. Calvo-Perez
- Facultad Ciencias
Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago, Chile
| | - W. Haase
- Eduard-Zintl-Institute
of Inorganic and Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, 64287
Darmstadt, Germany
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24
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Exploring the exchange interaction in a mixed valence {CoII4CoIII2} hexanuclear cluster with novel topology. Polyhedron 2012. [DOI: 10.1016/j.poly.2011.11.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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25
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Maganas D, Sottini S, Kyritsis P, Groenen EJJ, Neese F. Theoretical Analysis of the Spin Hamiltonian Parameters in Co(II)S4 Complexes, Using Density Functional Theory and Correlated ab initio Methods. Inorg Chem 2011; 50:8741-54. [DOI: 10.1021/ic200299y] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Dimitrios Maganas
- Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, GR-15771 Athens, Greece
- Institute of Theoretical and Physical Chemistry, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - Silvia Sottini
- Department of Molecular Physics, Huygens Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands
| | - Panayotis Kyritsis
- Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, GR-15771 Athens, Greece
| | - Edgar J. J. Groenen
- Department of Molecular Physics, Huygens Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands
| | - Frank Neese
- Institute of Theoretical and Physical Chemistry, Wegelerstrasse 12, D-53115 Bonn, Germany
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26
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Chong Y, Xudong S, Zixiang C, Yangang B, Yuyou C, Chaohui Y, Xiaoming L. Two W/Mo complexes containing 2,3-dihydroxynaphthalene: synthesis and structure analysis. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.600754] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Yu Chong
- a Department of Chemistry , Capital Normal University , Beijing 100048, China
| | - Shi Xudong
- a Department of Chemistry , Capital Normal University , Beijing 100048, China
| | - Chi Zixiang
- a Department of Chemistry , Capital Normal University , Beijing 100048, China
| | - Bi Yangang
- a Department of Chemistry , Capital Normal University , Beijing 100048, China
| | - Chen Yuyou
- a Department of Chemistry , Capital Normal University , Beijing 100048, China
| | - Ye Chaohui
- b Wuhan Institute of Physics and Mathematics , Wuhan 430071, China
| | - Lu Xiaoming
- a Department of Chemistry , Capital Normal University , Beijing 100048, China
- b Wuhan Institute of Physics and Mathematics , Wuhan 430071, China
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27
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Ostrovsky S. Peculiarities of MCD C-term saturation behavior of the exchange coupled Co(II) dimers. Chem Phys 2011. [DOI: 10.1016/j.chemphys.2011.06.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Nakano M, Oshio H. Magnetic anisotropies in paramagnetic polynuclear metal complexes. Chem Soc Rev 2011; 40:3239-48. [PMID: 21475738 DOI: 10.1039/c0cs00223b] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The study of the magnetic properties of highly anisotropic paramagnetic molecules is an area of intense current research interest. Of these, single-molecule magnets (SMMs) and single-chain magnets (SCMs) showing non-equilibrium magnetization have remained a key topic over the past two decades. The slow magnetization reversals found in SMMs and SCMs are contingent on two requirements: a large ground-state spin forbidding direct quantum transitions of spin reversal, and a series of excited spin levels, due to the anisotropy of the system, which can act as steppingstones for the thermal relaxation of the spin orientations (the Orbach process). In this critical review, the latter requirement, i.e. the existence of magnetic anisotropies in paramagnetic species, is reviewed with the aim of providing clues towards the rational design of molecule-based magnets (100 references).
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Affiliation(s)
- Motohiro Nakano
- Division of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka, Japan.
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29
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Zhang JW, Wang HS, Song Y. Octacyanotungstate (V)-based square [W2Mn2] complexes: Effect of intermolecular interaction on molecule-based magnetism. INORG CHEM COMMUN 2011. [DOI: 10.1016/j.inoche.2010.09.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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Lin SY, Xu GF, Zhao L, Tang J, Liu GX. Structure and Magnetic Properties of A μ-Phenoxido-bridged Dinuclear Cobalt(II) Complex. Z Anorg Allg Chem 2010. [DOI: 10.1002/zaac.201000398] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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Ostrovsky S, Tomkowicz Z, Haase W. Exchange-Coupled Cobalt(II) Dimer with Unusual Magnetic Circular Dichroism Saturation Behavior. Inorg Chem 2010; 49:6942-7. [DOI: 10.1021/ic100556p] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. Ostrovsky
- Eduard-Zintl-Institute of Inorganic and Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, 64287 Darmstadt, Germany
- Institute of Applied Physics, Academy of Sciences of Moldova, Academy 5, MD-2028 Chisinau, Moldova
| | - Z. Tomkowicz
- Eduard-Zintl-Institute of Inorganic and Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, 64287 Darmstadt, Germany
- Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
| | - W. Haase
- Eduard-Zintl-Institute of Inorganic and Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, 64287 Darmstadt, Germany
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32
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van Slageren J, Piligkos S, Neese F. Magnetic circular dichroism spectroscopy on the Cr₈ antiferromagnetic ring. Dalton Trans 2010; 39:4999-5004. [PMID: 21491661 DOI: 10.1039/b925028j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Magnetic Circular Dichroism (MCD) spectroscopic study of the antiferromagnetic ring [Cr₈F₈Piv₁₆] (Piv = pivalate) is reported. From the splitting of the MCD bands, the single ion anisotropy parameters in the cluster spin ground state at different fields were determined to be d(Cr) = -0.33 ± 0.02 cm⁻¹, e(Cr) = 0.11 ± 0.01 cm⁻¹. Analysis of the MCD intensity as a function of field and temperature revealed the influence of spin mixing effects and yielded independent estimates of the single ion anisotropies (d(Cr) = -0.19 cm⁻¹, e(Cr) = 4.3 × 10-4 cm⁻¹), as well as yielding the isotropic exchange interaction strength (J = -6.00 cm⁻¹). Thus it is shown that MCD is a powerful method to unravel the relation between single-ion and cluster anisotropy, furthering the design of molecular magnets with desired properties.
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33
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Bassil BS, Ibrahim M, Mal SS, Suchopar A, Biboum RN, Keita B, Nadjo L, Nellutla S, van Tol J, Dalal NS, Kortz U. Cobalt, Manganese, Nickel, and Vanadium Derivatives of the Cyclic 48-Tungsto-8-Phosphate [H7P8W48O184]33−. Inorg Chem 2010; 49:4949-59. [DOI: 10.1021/ic100050r] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bassem S. Bassil
- Jacobs University, School of Engineering and Science, P.O. Box 750 561, 28725 Bremen, Germany
| | - Masooma Ibrahim
- Jacobs University, School of Engineering and Science, P.O. Box 750 561, 28725 Bremen, Germany
| | - Sib Sankar Mal
- Jacobs University, School of Engineering and Science, P.O. Box 750 561, 28725 Bremen, Germany
| | - Andreas Suchopar
- Jacobs University, School of Engineering and Science, P.O. Box 750 561, 28725 Bremen, Germany
| | - Rosa Ngo Biboum
- Laboratoire de Chimie Physique, UMR 8000 CNRS, Université Paris-Sud 11, 91405 Orsay Cedex, France
| | - Bineta Keita
- Laboratoire de Chimie Physique, UMR 8000 CNRS, Université Paris-Sud 11, 91405 Orsay Cedex, France
| | - Louis Nadjo
- Laboratoire de Chimie Physique, UMR 8000 CNRS, Université Paris-Sud 11, 91405 Orsay Cedex, France
| | - Saritha Nellutla
- Department of Chemistry and Biochemistry, Florida State University and Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Tallahassee, Florida 32306−4390
| | - Johan van Tol
- Department of Chemistry and Biochemistry, Florida State University and Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Tallahassee, Florida 32306−4390
| | - Naresh S. Dalal
- Department of Chemistry and Biochemistry, Florida State University and Center for Interdisciplinary Magnetic Resonance, National High Magnetic Field Laboratory, Tallahassee, Florida 32306−4390
| | - Ulrich Kortz
- Jacobs University, School of Engineering and Science, P.O. Box 750 561, 28725 Bremen, Germany
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