1
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Cabrosi D, Cruz C, Paredes-García V, Alborés P. A dinuclear Co( iii)/Co( ii) complex based on the H 2pmide ligand showing field-induced SMM behaviour. Dalton Trans 2023; 52:175-184. [DOI: 10.1039/d2dt03492a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We report a combined computational and experimental study of the field-induced SMM behaviour of a Co(ii)/Co(iii) dinuclear complex with a pair-like H-bond intermolecular interaction.
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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
- 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
- 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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2
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Matos CRMO, Sarmiento CV, C Silva H, Ferreira GB, Guedes GP, Nunes WC, Ronconi CM. Field-induced single-ion magnets exhibiting tri-axial anisotropy in a 1D Co(II) coordination polymer with a rigid ligand 4,4'-(buta-1,3-diyne-1,4-diyl)dibenzoate. Dalton Trans 2021; 50:15003-15014. [PMID: 34726676 DOI: 10.1039/d1dt01961a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein a 1D Co(II) coordination polymer of formula [Co(η1-L1)(η2-L1)(py)2(H2O)]n (CoCP) has been synthesised using the rigid H2L1 proligand, containing a long spacer bearing two triple bonds. Single-crystal X-ray diffraction showed that Co(II) adopts a distorted octahedral geometry. The state-averaged complete active self-consistent field (SA-CASSCF) calculation showed that the ground state of CoCP is a high spin quartet with a highly multiconfigurational character of its electronic structure. Due to the large intra- and intermolecular distances between the spin carriers, the magnetic interactions are negligible and the zero-field splitting (ZFS) effects of cobalt(II) ions are predominant. This behavior was confirmed by direct current (DC) magnetic measurements and theoretical calculations using the broken-symmetry approach. Quantum chemical calculations indicate that CoCP has a negative axial component possessing mixed tri-axial anisotropy. The DC magnetic susceptibility data were fitted with a Griffith-Figgis Hamiltonian and the obtained parameters are in good agreement with those simulated by the ab initio calculation. Alternating current (AC) magnetic measurements showed a field induced slow magnetic relaxation in CoCP, which is attributed to the hyperfine interaction effects.
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Affiliation(s)
- Catiúcia R M O Matos
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Outeiro de São João Batista, s/n, Campus do Valonguinho, Centro, 24020-141, Niterói, RJ, Brazil.
| | - Charlie V Sarmiento
- Instituto de Física, Universidade Federal Fluminense (UFF), Niterói, RJ, 24210-346, Brazil
| | - Henrique C Silva
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Outeiro de São João Batista, s/n, Campus do Valonguinho, Centro, 24020-141, Niterói, RJ, Brazil.
| | - Glaucio B Ferreira
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Outeiro de São João Batista, s/n, Campus do Valonguinho, Centro, 24020-141, Niterói, RJ, Brazil.
| | - Guilherme P Guedes
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Outeiro de São João Batista, s/n, Campus do Valonguinho, Centro, 24020-141, Niterói, RJ, Brazil.
| | - Wallace C Nunes
- Instituto de Física, Universidade Federal Fluminense (UFF), Niterói, RJ, 24210-346, Brazil
| | - Célia M Ronconi
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Outeiro de São João Batista, s/n, Campus do Valonguinho, Centro, 24020-141, Niterói, RJ, Brazil.
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3
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Korchagin DV, Gureev YE, Yureva EA, Shilov GV, Akimov AV, Misochko EY, Morgunov RB, Zakharov KV, Vasiliev AN, Palii AV, Lohmiller T, Holldack K, Aldoshin SM. Field-induced single-ion magnet based on a quasi-octahedral Co(II) complex with mixed sulfur-oxygen coordination environment. Dalton Trans 2021; 50:13815-13822. [PMID: 34519734 DOI: 10.1039/d1dt02413b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis and characterization of structure and magnetic properties of the quasi-octahedral complex (pipH2)[Co(TDA)2] 2H2O (I), (pipH22+ = piperazine dication, TDA2- = thiodiacetic anion) are described. X-ray diffraction studies reveal the first coordination sphere of the Co(II) ion, consisting of two chelating tridentate TDA ligands with a mixed sulfur-oxygen strongly elongated octahedral coordination environment. SQUID magnetometry, frequency-domain Fourier-transform (FD-FT) THz-EPR spectroscopy, and high-level ab initio SA-CASSCF/NEVPT2 quantum chemical calculations reveal a strong "easy-plane" type magnetic anisotropy (D ≈ +54 cm-1) of complex I. The complex shows field-induced slow relaxation of magnetization at an applied DC field of 1000 Oe.
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Affiliation(s)
- D V Korchagin
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1, Acad. Semenov Av., Chernogolovka, Russian Federation, 142432.
| | - Ya E Gureev
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1, Acad. Semenov Av., Chernogolovka, Russian Federation, 142432. .,M.V. Lomonosov Moscow State University, Moscow 119991, Russia
| | - E A Yureva
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1, Acad. Semenov Av., Chernogolovka, Russian Federation, 142432.
| | - G V Shilov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1, Acad. Semenov Av., Chernogolovka, Russian Federation, 142432.
| | - A V Akimov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1, Acad. Semenov Av., Chernogolovka, Russian Federation, 142432.
| | - E Ya Misochko
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1, Acad. Semenov Av., Chernogolovka, Russian Federation, 142432.
| | - R B Morgunov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1, Acad. Semenov Av., Chernogolovka, Russian Federation, 142432.
| | - K V Zakharov
- M.V. Lomonosov Moscow State University, Moscow 119991, Russia
| | - A N Vasiliev
- M.V. Lomonosov Moscow State University, Moscow 119991, Russia.,National University of Science and Technology "MISiS", Moscow, 119049, Russia
| | - A V Palii
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1, Acad. Semenov Av., Chernogolovka, Russian Federation, 142432. .,Institute of Applied Physics, Academy of Sciences of Moldova, Kishinev, Moldova
| | - T Lohmiller
- EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - K Holldack
- Institut für Methoden und Instrumentierung der Forschung mit Synchrotronstrahlung, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - S M Aldoshin
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1, Acad. Semenov Av., Chernogolovka, Russian Federation, 142432.
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4
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de Campos NR, Simosono CA, Landre Rosa IM, da Silva RMR, Doriguetto AC, do Pim WD, Gomes Simões TR, Valdo AKSM, Martins FT, Sarmiento CV, Nunes WC, Guedes GP, Pedroso EF, Pereira CLM, Stumpf HO, Lloret F, Julve M, Marinho MV. Building-up host-guest helicate motifs and chains: a magneto-structural study of new field-induced cobalt-based single-ion magnets. Dalton Trans 2021; 50:10707-10728. [PMID: 34308946 DOI: 10.1039/d1dt01693h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we present the synthetic pathway, a refined structural description, complete solid-state characterization and the magnetic properties of four new cobalt(ii) compounds of formulas [Co(H2O)6][Co2(H2mpba)3]·2H2O·0.5dmso (1), [Co(H2O)6][Co2(H2mpba)3]·3H2O·0.5dpss (2), [Co2(H2mpba)2(H2O)4]n·4nH2O (3), and [Co2(H2mpba)2(CH3OH)2(H2O)2]n·0.5nH2O·2ndpss (4) [dpss = 2,2'-dipyridyldisulfide and H4mpba = 1,3-phenylenebis(oxamic) acid], where 2 and 4 were obtained from [Co(dpss)Cl2] (Pre-I) as the source of cobalt(ii). All four compounds are air-stable and were prepared under ambient conditions. 1 and 2 were obtained from a slow diffusion method [cobalt(ii) : H2mpba2- molar ratio used 1 : 1] and their structures are made up of [Co2(H2mpba)3]2- anionic helicate units and [Co(H2O)6]2+ cations, exhibiting supramolecular three-dimensional structures. Interestingly, a supramolecular honeycomb network between the helicate units interacting with each other through R22(10) type hydrogen bonds occurs in 2 hosting one co-crystallized dpss molecule. On the other hand, for the first time, linear (3) and zigzag (4) cobalt(ii) chains were isolated by slow evaporation of stirred solutions of mixed solvents with cobalt(ii) : H2mpba2- in 1 : 2 molar ratio at room temperature. Magnetic measurements of Pre-I revealed a quasi magnetically isolated S = 3/2 spin state with a significant second-order spin-orbit contribution as expected for tetrahedrally coordinated cobalt(ii) ions. The analysis of the variable temperature static (dc) magnetic susceptibility data through first- (1 and 3) and second-order spin-orbit coupling models (2 and 4) reveals the presence of magnetically non-interacting high-spin cobalt(ii) ions with easy-axis (1 and 4)/easy-plane magnetic anisotropies (2 and 4) with low rhombic distortions. Dynamic (ac) magnetic measurements for Pre-I and 1-4 below 8.0 K show that they are examples of field-induced Single-Ion Magnets (SIMs).
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Affiliation(s)
- Nathália R de Campos
- Instituto de Química, Universidade Federal de Alfenas, Campus Santa Clara, Alfenas, MG 37133-840, Brazil.
| | - Cintia A Simosono
- Instituto de Química, Universidade Federal de Alfenas, Campus Santa Clara, Alfenas, MG 37133-840, Brazil.
| | - Iara M Landre Rosa
- Instituto de Química, Universidade Federal de Alfenas, Campus Santa Clara, Alfenas, MG 37133-840, Brazil.
| | - Rafaela M R da Silva
- Instituto de Química, Universidade Federal de Alfenas, Campus Santa Clara, Alfenas, MG 37133-840, Brazil.
| | - Antônio C Doriguetto
- Instituto de Química, Universidade Federal de Alfenas, Campus Santa Clara, Alfenas, MG 37133-840, Brazil.
| | - Walace D do Pim
- Departamento de Química, Centro Federal de Educação Tecnológica de Minas Gerais, Belo Horizonte, MG 30421-169, Brazil
| | | | - Ana Karoline S M Valdo
- Instituto de Física, Universidade Federal de Goiás, Campus Samambaia, Goiânia, GO 74690-900, Brazil
| | - Felipe T Martins
- Instituto de Física, Universidade Federal de Goiás, Campus Samambaia, Goiânia, GO 74690-900, Brazil
| | - Charlie V Sarmiento
- Instituto de Física, Universidade Federal Fluminense, Niterói, Rio de Janeiro, RJ 24210-346, Brazil
| | - Wallace C Nunes
- Instituto de Física, Universidade Federal Fluminense, Niterói, Rio de Janeiro, RJ 24210-346, Brazil
| | - Guilherme P Guedes
- Instituto de Química, Universidade Federal Fluminense, Niterói, Rio de Janeiro, 24020-141, Brazil
| | - Emerson F Pedroso
- Departamento de Química, Centro Federal de Educação Tecnológica de Minas Gerais, Belo Horizonte, MG 30421-169, Brazil
| | - Cynthia L M Pereira
- Departamento de Química-ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Humberto O Stumpf
- Departamento de Química-ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Francesc Lloret
- Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMol), Universitat de València, C/catedrático José Beltrán 2, 46980 Paterna, València, Spain.
| | - Miguel Julve
- Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMol), Universitat de València, C/catedrático José Beltrán 2, 46980 Paterna, València, Spain.
| | - Maria Vanda Marinho
- Instituto de Química, Universidade Federal de Alfenas, Campus Santa Clara, Alfenas, MG 37133-840, Brazil.
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5
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Cirulli M, Salvadori E, Zhang Z, Dommett M, Tuna F, Bamberger H, Lewis JEM, Kaur A, Tizzard GJ, van Slageren J, Crespo‐Otero R, Goldup SM, Roessler MM. Rotaxane Co II Complexes as Field-Induced Single-Ion Magnets. Angew Chem Int Ed Engl 2021; 60:16051-16058. [PMID: 33901329 PMCID: PMC8361961 DOI: 10.1002/anie.202103596] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Indexed: 12/02/2022]
Abstract
Mechanically chelating ligands have untapped potential for the engineering of metal ion properties. Here we demonstrate this principle in the context of CoII -based single-ion magnets. Using multi-frequency EPR, susceptibility and magnetization measurements we found that these complexes show some of the highest zero field splittings reported for five-coordinate CoII complexes to date. The predictable coordination behaviour of the interlocked ligands allowed the magnetic properties of their CoII complexes to be evaluated computationally a priori and our combined experimental and theoretical approach enabled us to rationalize the observed trends. The predictable magnetic behaviour of the rotaxane CoII complexes demonstrates that interlocked ligands offer a new strategy to design metal complexes with interesting functionality.
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Affiliation(s)
- Martina Cirulli
- School of Biological and Chemical SciencesQueen Mary University of LondonMile End RoadLondonE1 4NSUK
| | - Enrico Salvadori
- School of Biological and Chemical SciencesQueen Mary University of LondonMile End RoadLondonE1 4NSUK
- Department of ChemistryUniversity of TorinoVia Giuria 710125TorinoItaly
| | - Zhi‐Hui Zhang
- ChemistryUniversity of SouthamptonHighfieldSO 17 1BJUK
| | - Michael Dommett
- School of Biological and Chemical SciencesQueen Mary University of LondonMile End RoadLondonE1 4NSUK
| | - Floriana Tuna
- Department of Chemistry and Photon Science InstituteUniversity of ManchesterOxford RoadManchesterM13 0PLUK
| | - Heiko Bamberger
- Institut für Physikalische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - James E. M. Lewis
- ChemistryUniversity of SouthamptonHighfieldSO 17 1BJUK
- Department of ChemistryImperial College LondonMolecular Sciences Research HubWood LaneLondonW12 0BZUK
| | | | - Graham J. Tizzard
- EPSRC National Crystallographic ServiceUniversity of SouthamptonHighfieldSouthamptonSO17 1BJUK
| | - Joris van Slageren
- Institut für Physikalische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Rachel Crespo‐Otero
- School of Biological and Chemical SciencesQueen Mary University of LondonMile End RoadLondonE1 4NSUK
| | | | - Maxie M. Roessler
- School of Biological and Chemical SciencesQueen Mary University of LondonMile End RoadLondonE1 4NSUK
- Department of ChemistryImperial College LondonMolecular Sciences Research HubWood LaneLondonW12 0BZUK
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6
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Cirulli M, Salvadori E, Zhang Z, Dommett M, Tuna F, Bamberger H, Lewis JEM, Kaur A, Tizzard GJ, Slageren J, Crespo‐Otero R, Goldup SM, Roessler MM. Rotaxane Co
II
Complexes as Field‐Induced Single‐Ion Magnets. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103596] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Martina Cirulli
- School of Biological and Chemical Sciences Queen Mary University of London Mile End Road London E1 4NS UK
| | - Enrico Salvadori
- School of Biological and Chemical Sciences Queen Mary University of London Mile End Road London E1 4NS UK
- Department of Chemistry University of Torino Via Giuria 7 10125 Torino Italy
| | - Zhi‐Hui Zhang
- Chemistry University of Southampton Highfield SO 17 1BJ UK
| | - Michael Dommett
- School of Biological and Chemical Sciences Queen Mary University of London Mile End Road London E1 4NS UK
| | - Floriana Tuna
- Department of Chemistry and Photon Science Institute University of Manchester Oxford Road Manchester M13 0PL UK
| | - Heiko Bamberger
- Institut für Physikalische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - James E. M. Lewis
- Chemistry University of Southampton Highfield SO 17 1BJ UK
- Department of Chemistry Imperial College London Molecular Sciences Research Hub Wood Lane London W12 0BZ UK
| | - Amanpreet Kaur
- Chemistry University of Southampton Highfield SO 17 1BJ UK
| | - Graham J. Tizzard
- EPSRC National Crystallographic Service University of Southampton Highfield Southampton SO17 1BJ UK
| | - Joris Slageren
- Institut für Physikalische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Rachel Crespo‐Otero
- School of Biological and Chemical Sciences Queen Mary University of London Mile End Road London E1 4NS UK
| | | | - Maxie M. Roessler
- School of Biological and Chemical Sciences Queen Mary University of London Mile End Road London E1 4NS UK
- Department of Chemistry Imperial College London Molecular Sciences Research Hub Wood Lane London W12 0BZ UK
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7
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Abstract
Octahedral tris(ethylenediamine) coordination complexes demonstrate helicoidal chirality, due to the arrangement of the ligands around the metal core. The enantiomers of the nitrate salts [Ni(en)3](NO3)2 and [Zn(en)3](NO3)2 spontaneously resolve to form a mixture of conglomerate crystals, which present a reversible phase transition from space group P6322 to enantiomorphic P6522 or P6122, with the latter depending on the handedness of the enantiomer. We report here the synthesis and characterization of [Mn(en)3](NO3)2 and [Co(en)3](NO3)2, which are isostructural to the Zn(II) and Ni(II) derivatives. The Mn(II) analogue undergoes the same phase transition centered at 150(2) K, as determined by single-crystal X-ray diffraction, Raman spectroscopy, and differential scanning calorimetry. The Co(II) derivative does not demonstrate a phase transition down to 2 K, as evidenced by powder X-ray diffraction and heat capacity measurements. The phase transition does not impact the magnetic properties of the Ni(II) and Mn(II) analogues; these high spin compounds display Curie behavior that is consistent with S = 1 and 5/2, respectively, down to 20 K, while the temperature-dependent magnetic moment for the Co(II) compound reveals a significant orbital contribution.
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8
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Gransbury GK, Boulon ME, Mole RA, Gable RW, Moubaraki B, Murray KS, Sorace L, Soncini A, Boskovic C. Single-ion anisotropy and exchange coupling in cobalt(ii)-radical complexes: insights from magnetic and ab initio studies. Chem Sci 2019; 10:8855-8871. [PMID: 31803460 PMCID: PMC6853083 DOI: 10.1039/c9sc00914k] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 07/27/2019] [Indexed: 01/18/2023] Open
Abstract
The concurrent effects of single-ion anisotropy and exchange interactions on the electronic structure and magnetization dynamics have been analyzed for a cobalt(ii)-semiquinonate complex. Analogs containing diamagnetic catecholate and tropolonate ligands were employed for comparison of the magnetic behavior and zinc congeners assisted with the spectroscopic characterization and assessment of intermolecular interactions in the cobalt(ii) compounds. Low temperature X-band (ν ≈ 9.4 GHz) and W-Band (ν ≈ 94 GHz) electron paramagnetic resonance spectroscopy and static and dynamic magnetic measurements have been used to elucidate the electronic structure of the high spin cobalt(ii) ion in [Co(Me3tpa)(Br4cat)] (1; Me3tpa = tris[(6-methyl-2-pyridyl)methyl]amine, Br4cat2- = tetrabromocatecholate) and [Co(Me3tpa)(trop)](PF6) (2(PF6); trop- = tropolonate), which show slow relaxation of the magnetization in applied field. The cobalt(ii)-semiquinonate exchange interaction in [Co(Me3tpa)(dbsq)](PF6)·tol (3(PF6)·tol; dbsq- = 3,5-di-tert-butylsemiquinonate, tol = toluene) has been determined using an anisotropic exchange Hamiltonian in conjunction with multistate restricted active space self-consistent field ab initio modeling and wavefunction analysis, with comparison to magnetic and inelastic neutron scattering data. Our results demonstrate dominant ferromagnetic exchange for 3+ that is of similar magnitude to the anisotropy parameters of the cobalt(ii) ion and contains a significant contribution from spin-orbit coupling. The nature of the exchange coupling between octahedral high spin cobalt(ii) and semiquinonate ligands is a longstanding question; answering this question for the specific case of 3+ has confirmed the considerable sensitivity of the exchange to the molecular structure. The methodology employed will be generally applicable for elucidating exchange coupling between orbitally-degenerate metal ions and radical ligands and relevant to the development of bistable molecules and their integration into devices.
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Affiliation(s)
- Gemma K Gransbury
- School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia .
| | - Marie-Emmanuelle Boulon
- UdR INSTM , Department of Chemistry "U. Schiff" , University of Florence , 50019 Sesto Fiorentino (FI) , Italy
| | - Richard A Mole
- Australian Nuclear Science and Technology Organisation , Locked Bag 2001 , Kirrawee DC , New South Wales 2232 , Australia
| | - Robert W Gable
- School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia .
| | - Boujemaa Moubaraki
- School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia
| | - Keith S Murray
- School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia
| | - Lorenzo Sorace
- UdR INSTM , Department of Chemistry "U. Schiff" , University of Florence , 50019 Sesto Fiorentino (FI) , Italy
| | - Alessandro Soncini
- School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia .
| | - Colette Boskovic
- School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia .
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9
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Kobayashi F, Ohtani R, Nakamura M, Lindoy LF, Hayami S. Slow Magnetic Relaxation Triggered by a Structural Phase Transition in Long-Chain-Alkylated Cobalt(II) Single-Ion Magnets. Inorg Chem 2019; 58:7409-7415. [PMID: 31117627 DOI: 10.1021/acs.inorgchem.9b00543] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The behavior of single-ion magnets (SIMs) that reflects large distortions of their coordination environments caused by the packing of long alkyl chains for two Co(II) complexes of the type [Co(C n-terpy)2](BF4)2 (C n-terpy = 4'-alkoxy-2,2':6',2″-terpyridine; n = 10 (1), 16 (2)) is reported. 1·2MeOH, which features a highly distorted octahedral high-spin Co(II) center, exhibits field-induced slow magnetic relaxation under an applied dc field of 1000 Oe. Further detailed analysis of the relaxation process indicated the prevalence of the Raman process at low temperature. Surprisingly, 2 shows a reverse spin transition (rST) and also exhibits remarkable field-induced SIM behavior, revealing the presence of magnetic anisotropy for this high-spin Co(II) species that is triggered by a structural phase transition. We present here the first examples of the coexistence of field-induced slow magnetic relaxation and rST associated with structural phase transitions involving long-alkyl-chain conformational changes from gauche to anti. These results indicate the prospect of inducing SIM properties in other distorted high-spin Co(II) species bearing long alkyl chains.
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Affiliation(s)
- Fumiya Kobayashi
- Department of Chemistry, Graduate School of Science and Technology , Kumamoto University , 2-39-1 Kurokami , Chuo-ku, Kumamoto 860-8555 , Japan
| | - Ryo Ohtani
- Department of Chemistry, Graduate School of Science and Technology , Kumamoto University , 2-39-1 Kurokami , Chuo-ku, Kumamoto 860-8555 , Japan
| | - Masaaki Nakamura
- Department of Chemistry, Graduate School of Science and Technology , Kumamoto University , 2-39-1 Kurokami , Chuo-ku, Kumamoto 860-8555 , Japan
| | - Leonard F Lindoy
- School of Chemistry , The University of Sydney , Sydney , New South Wales 2006 , Australia
| | - Shinya Hayami
- Department of Chemistry, Graduate School of Science and Technology , Kumamoto University , 2-39-1 Kurokami , Chuo-ku, Kumamoto 860-8555 , Japan.,Institute of Pulsed Power Science (IPPS) , Kumamoto University , 2-39-1 Kurokami , Chuo-ku, Kumamoto 860-8555 , Japan
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10
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Masegosa A, Palacios MA, Ruiz E, Gómez-Coca S, Krzystek J, Moreno JM, Colacio E. Dinuclear CoIIYIIIvs. tetranuclear CoII2YIII2 complexes: the effect of increasing molecular size on magnetic anisotropy and relaxation dynamics. Dalton Trans 2019; 48:14873-14884. [DOI: 10.1039/c9dt02969a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The lower distortion of the CoII ions in the new tetranuclear CoII2YIII2 complex leads to a larger magnetic anisotropy than in its CoIIYIII counterparts, whereas its larger size and flexibility seem to promote a faster relaxation dynamic.
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Affiliation(s)
- Alberto Masegosa
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- 18071 Granada
- Spain
| | - María A. Palacios
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- 18071 Granada
- Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional
- Universitat de Barcelona
- Barcelona E-08028
- Spain
| | - Silvia Gómez-Coca
- Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional
- Universitat de Barcelona
- Barcelona E-08028
- Spain
| | - J. Krzystek
- National High Magnetic Field Laboratory
- Florida State University
- Tallahassee
- USA
| | - José M. Moreno
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- 18071 Granada
- Spain
| | - Enrique Colacio
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- 18071 Granada
- Spain
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11
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Böhme M, Plass W. rhOver: Determination of magnetic anisotropy and related properties for dysprosium(III) single-ion magnets by semiempirical approaches utilizing Hartree-Fock wave functions. J Comput Chem 2018; 39:2697-2712. [DOI: 10.1002/jcc.25565] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 07/26/2018] [Accepted: 07/31/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Michael Böhme
- Institut für Anorganische und Analytische Chemie, Lehrstuhl für Anorganische Chemie II; Friedrich-Schiller-Universität Jena; Humboldtstr. 8, 07743 Jena Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Lehrstuhl für Anorganische Chemie II; Friedrich-Schiller-Universität Jena; Humboldtstr. 8, 07743 Jena Germany
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12
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Chattopadhyay K, Heras Ojea MJ, Sarkar A, Murrie M, Rajaraman G, Ray D. Trapping of a Pseudotetrahedral Co IIO 4 Core in Mixed-Valence Mixed-Geometry [Co 5] Coordination Aggregates: Synthetic Marvel, Structures, and Magnetism. Inorg Chem 2018; 57:13176-13187. [PMID: 30351068 DOI: 10.1021/acs.inorgchem.8b01577] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A systematic one-step one-pot multicomponent reaction of Co(ClO4)2·6H2O, H3L (2,6-bis((2-(2-hydroxyethylamino)ethylimino)methyl)-4-methylphenol), and readily available carboxylate salts (RCO2Na; R = CH3, C2H5) resulted in the two structurally novel coordination aggregates [CoIICoIII4L2(μ1,3-O2CCH3)2(μ-OH)2](ClO4)4·4H2O (1) and [CoIICoIII4L2(μ1,3-O2CC2H5)2(μ-OH)(μ-OMe)](ClO4)4·5H2O (2). At room temperature, reactions of H3L in MeOH with cobalt(II) perchlorate salts led to coassembly of initially formed ligand-bound {CoII2} fragments following aerial oxidation of metal centers and bridging by in situ generated hydroxido/alkoxido groups and added carboxylate anions. Available alkoxido arms of the initially formed {L(μ1,3-O2CCH3)(μ-OH/OMe)Co2}+ fragments were utilized to trap a central CoII ion during the formation of [Co5] aggregates. In the solid state, both complexes have been characterized by X-ray crystallography, variable-temperature magnetic measurements, and theoretical studies. Both 1 and 2 show field-induced slow magnetic relaxation that arises from the single pseudo- T d CoII ion present. The structural distortion leads to an easy-axis magnetic anisotropy ( D = -31.31 cm-1 for 1 and -21.88 cm-1 for 2) and a small but non-negligible transverse component ( E/ D = 0.11 for 1 and 0.08 for 2). The theoretical studies also reveal how the O-Co-O bond angles and the interplanar angles control D and E values in 1 and 2. The presence of two diamagnetic {Co2(μ-L)} hosts controls the distortion of the central {CoO4} unit, highlighting a strategy to control single-ion magnetic anisotropy by trapping single ions within a diamagnetic coordination environment.
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Affiliation(s)
- Krishna Chattopadhyay
- Department of Chemistry , Indian Institute of Technology Kharagpur , Kharagpur 721 302 , India.,School of Chemical Sciences , Indian Association for the Cultivation of Science , Jadavpur, Kolkata 700032 , India
| | - María José Heras Ojea
- WestCHEM, School of Chemistry , University of Glasgow , University Avenue , Glasgow G12 8QQ , U.K
| | - Arup Sarkar
- Department of Chemistry , Indian Institute of Technology Bombay , Mumbai 400 076 , India
| | - Mark Murrie
- WestCHEM, School of Chemistry , University of Glasgow , University Avenue , Glasgow G12 8QQ , U.K
| | - Gopalan Rajaraman
- Department of Chemistry , Indian Institute of Technology Bombay , Mumbai 400 076 , India
| | - Debashis Ray
- Department of Chemistry , Indian Institute of Technology Kharagpur , Kharagpur 721 302 , India
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13
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Hu ZB, Jing ZY, Li MM, Yin L, Gao YD, Yu F, Hu TP, Wang Z, Song Y. Important Role of Intermolecular Interaction in Cobalt(II) Single-Ion Magnet from Single Slow Relaxation to Double Slow Relaxation. Inorg Chem 2018; 57:10761-10767. [PMID: 30109925 DOI: 10.1021/acs.inorgchem.8b01389] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two cobalt complexes with similar structures were synthesized using quinoline-2-carboxylic acid (HL) as the ligand. Both complexes are six-coordinated in antitriangular prism coordination geometries. There are one and four molecule units per cell for 1 and 2, respectively, with nearest Co-Co distances of 7.129 and 5.855 Å, respectively, which lead to their intermolecular interactions zj'. Both complexes are field-induced single-ion magnets. Complex 1 shows single slow relaxation under Hdc = 1.5 kOe attributed to the moment reversal, while complex 2 shows double slow relaxation resulting from intermolecular dipolar interaction and moment reversal, respectively.
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Affiliation(s)
- Zhao-Bo Hu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering , Nanjing University , Xianlin Road 163 , Nanjing 210023 , PR China
| | - Zhao-Yang Jing
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering , Nanjing University , Xianlin Road 163 , Nanjing 210023 , PR China
| | - Miao-Miao Li
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering , Nanjing University , Xianlin Road 163 , Nanjing 210023 , PR China.,Department of Chemistry, College of Science , North University of China , Xueyuan Road 3 , Taiyuan 030051 , PR China
| | - Lei Yin
- Wuhan National High Magnetic Field Center & School of Physics , Huazhong University of Science and Technology , Wuhan 430074 , PR China
| | - Yan-Dong Gao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering , Nanjing University , Xianlin Road 163 , Nanjing 210023 , PR China
| | - Fei Yu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering , Nanjing University , Xianlin Road 163 , Nanjing 210023 , PR China
| | - Tuo-Ping Hu
- Department of Chemistry, College of Science , North University of China , Xueyuan Road 3 , Taiyuan 030051 , PR China
| | - Zhenxing Wang
- Wuhan National High Magnetic Field Center & School of Physics , Huazhong University of Science and Technology , Wuhan 430074 , PR China
| | - You Song
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering , Nanjing University , Xianlin Road 163 , Nanjing 210023 , PR China
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14
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Zhou J, Song J, Yuan A, Wang Z, Chen L, Ouyang ZW. Slow magnetic relaxation in two octahedral cobalt(II) complexes with positive axial anisotropy. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Rigamonti L, Bridonneau N, Poneti G, Tesi L, Sorace L, Pinkowicz D, Jover J, Ruiz E, Sessoli R, Cornia A. A Pseudo-Octahedral Cobalt(II) Complex with Bispyrazolylpyridine Ligands Acting as a Zero-Field Single-Molecule Magnet with Easy Axis Anisotropy. Chemistry 2018; 24:8857-8868. [PMID: 29655240 DOI: 10.1002/chem.201801026] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Indexed: 01/31/2023]
Abstract
The homoleptic mononuclear compound [Co(bpp-COOMe)2 ](ClO4 )2 (1) (bpp-COOMe=methyl 2,6-di(pyrazol-1-yl)pyridine-4-carboxylate) crystallizes in the monoclinic C2/c space group, and the cobalt(II) ion possesses a pseudo-octahedral environment given by the two mer-coordinated tridentate ligands. Direct-current magnetic data, single-crystal torque magnetometry, and EPR measurements disclosed the easy-axis nature of this cobalt(II) complex, which shows single-molecule magnet behavior when a static field is applied in alternating-current susceptibility measurements. Diamagnetic dilution in the zinc(II) analogue [Zn(bpp-COOMe)2 ](ClO4 )2 (2) afforded the derivative [Zn0.95 Co0.05 (bpp-COOMe)2 ](ClO4 )2 (3), which exhibits slow relaxation of magnetization even in zero field thanks to the reduction of dipolar interactions. Theoretical calculations confirmed the overall electronic structure and the magnetic scenario of the compound as drawn by experimental data, thus confirming the spin-phonon Raman relaxation mechanism, and a direct quantum tunneling in the ground state as the most plausible relaxation pathway in zero field.
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Affiliation(s)
- Luca Rigamonti
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, and INSTM RU of Modena and Reggio Emilia, via G. Campi 103, 41125, Modena, Italy
| | - Nathalie Bridonneau
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, and INSTM RU of Modena and Reggio Emilia, via G. Campi 103, 41125, Modena, Italy.,Current address: Laboratoire Interfaces Traitements Organisation, et Dynamique des Systèmes (ITODYS), UMR 7086 CNRS, Université Paris 7 Diderot, Paris Bât. Lavoisier, 15 rue Jean-Antoine de Baïf, 75205, Paris Cedex 13, France
| | - Giordano Poneti
- Laboratory of Molecular Magnetism (LAMM), Dipartimento di Chimica 'Ugo Schiff', Università degli Studi di Firenze, and INSTM RU of Firenze, via della Lastruccia 3-13, 50019, Sesto Fiorentino, FI, Italy.,Current address: Instituto de Química, Universidade Federal do Rio de Janeiro, 21941-909, Rio de Janeiro, Brazil
| | - Lorenzo Tesi
- Laboratory of Molecular Magnetism (LAMM), Dipartimento di Chimica 'Ugo Schiff', Università degli Studi di Firenze, and INSTM RU of Firenze, via della Lastruccia 3-13, 50019, Sesto Fiorentino, FI, Italy
| | - Lorenzo Sorace
- Laboratory of Molecular Magnetism (LAMM), Dipartimento di Chimica 'Ugo Schiff', Università degli Studi di Firenze, and INSTM RU of Firenze, via della Lastruccia 3-13, 50019, Sesto Fiorentino, FI, Italy
| | - Dawid Pinkowicz
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Kraków, Poland
| | - Jesus Jover
- Departament de Química Inorgànica i Orgànica, Institut de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028, Barcelona, Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica i Orgànica, Institut de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028, Barcelona, Spain
| | - Roberta Sessoli
- Laboratory of Molecular Magnetism (LAMM), Dipartimento di Chimica 'Ugo Schiff', Università degli Studi di Firenze, and INSTM RU of Firenze, via della Lastruccia 3-13, 50019, Sesto Fiorentino, FI, Italy
| | - Andrea Cornia
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, and INSTM RU of Modena and Reggio Emilia, via G. Campi 103, 41125, Modena, Italy
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16
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Zhang J, Li J, Yang L, Yuan C, Zhang YQ, Song Y. Magnetic Anisotropy from Trigonal Prismatic to Trigonal Antiprismatic Co(II) Complexes: Experimental Observation and Theoretical Prediction. Inorg Chem 2018. [PMID: 29528627 DOI: 10.1021/acs.inorgchem.8b00055] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A family of trigonal antiprismatic Co(II) complexes was synthesized, which exhibited field-induced Raman process dominated single-molecule magnet behavior. Despite the coordination environment of Co(II) being of similar symmetry, the four complexes exhibit distinct dynamic magnetic properties owing to their packing arrangements and dipole-dipole interactions. On the basis of computational results we have demonstrated that the g z and giso values follow a cosine relation with respect to the rotated angle φ (twist angle φ defined as the rotation angle of one coordination square away from the eclipse conformation to the other).
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Affiliation(s)
- Jing Zhang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Jing Li
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Li Yang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Chen Yuan
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology , Nanjing Normal University , Nanjing 210023 , China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology , Nanjing Normal University , Nanjing 210023 , China
| | - You Song
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
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17
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Yamane T, Sugisaki K, Matsuoka H, Sato K, Toyota K, Shiomi D, Takui T. ESR analyses of picket fence MnII and 6th ligand coordinated FeIII porphyrins (S = 5/2) and a CoII(hfac) complex (S = 3/2) with sizable ZFS parameters revisited: a full spin Hamiltonian approach and quantum chemical calculations. Dalton Trans 2018; 47:16429-16444. [DOI: 10.1039/c8dt02988a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The conventional X-band ESR spectra are fully reanalyzed by a full spin Hamiltonian approach.
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Affiliation(s)
- Takeshi Yamane
- Department of Chemistry and Molecular Materials Science
- Graduate School of Science
- Osaka City University
- Osaka
- Japan
| | - Kenji Sugisaki
- Department of Chemistry and Molecular Materials Science
- Graduate School of Science
- Osaka City University
- Osaka
- Japan
| | - Hideto Matsuoka
- Department of Chemistry and Molecular Materials Science
- Graduate School of Science
- Osaka City University
- Osaka
- Japan
| | - Kazunobu Sato
- Department of Chemistry and Molecular Materials Science
- Graduate School of Science
- Osaka City University
- Osaka
- Japan
| | - Kazuo Toyota
- Department of Chemistry and Molecular Materials Science
- Graduate School of Science
- Osaka City University
- Osaka
- Japan
| | - Daisuke Shiomi
- Department of Chemistry and Molecular Materials Science
- Graduate School of Science
- Osaka City University
- Osaka
- Japan
| | - Takeji Takui
- Department of Chemistry and Molecular Materials Science
- Graduate School of Science
- Osaka City University
- Osaka
- Japan
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18
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Böhme M, Ziegenbalg S, Aliabadi A, Schnegg A, Görls H, Plass W. Magnetic relaxation in cobalt(ii)-based single-ion magnets influenced by distortion of the pseudotetrahedral [N2O2] coordination environment. Dalton Trans 2018; 47:10861-10873. [DOI: 10.1039/c8dt01530a] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Cobalt(ii) complexes with different dihedral angles between the bidentate ligands show a significant variation in their magnetic relaxation behavior.
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Affiliation(s)
- Michael Böhme
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07745 Jena
- Germany
| | - Sven Ziegenbalg
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07745 Jena
- Germany
| | - Azar Aliabadi
- Berlin Joint EPR Lab
- Institute for Nanospectroscopy
- Helmholtz-Zentrum Berlin für Materialien und Energie
- 12489 Berlin
- Germany
| | - Alexander Schnegg
- Berlin Joint EPR Lab
- Institute for Nanospectroscopy
- Helmholtz-Zentrum Berlin für Materialien und Energie
- 12489 Berlin
- Germany
| | - Helmar Görls
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07745 Jena
- Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie
- Friedrich-Schiller-Universität Jena
- 07745 Jena
- Germany
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19
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Chen SY, Cui HH, Zhang YQ, Wang Z, Ouyang ZW, Chen L, Chen XT, Yan H, Xue ZL. Magnetic anisotropy and relaxation behavior of six-coordinate tris(pivalato)-Co(ii) and -Ni(ii) complexes. Dalton Trans 2018; 47:10162-10171. [DOI: 10.1039/c8dt01554f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Magnetic measurements, HFEPR and theoretical calculations have been used to study the magnetic anisotropy of the six-coordinate field-induced single ion magnet (NBu4)[Co(piv)3] and its Ni analogue.
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Affiliation(s)
- Shu-Yang Chen
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- China
| | - Hui-Hui Cui
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- China
| | - Zhenxing Wang
- Wuhan National High Magnetic Field Center & School of Physics
- Huazhong University of Science and Technology
- Wuhan 430074
- China
| | - Zhong-Wen Ouyang
- Wuhan National High Magnetic Field Center & School of Physics
- Huazhong University of Science and Technology
- Wuhan 430074
- China
| | - Lei Chen
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- China
| | - Xue-Tai Chen
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- China
| | - Hong Yan
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- China
| | - Zi-Ling Xue
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
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20
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Sertphon D, Murray KS, Phonsri W, Jover J, Ruiz E, Telfer SG, Alkaş A, Harding P, Harding DJ. Slow relaxation of magnetization in a bis-mer-tridentate octahedral Co(ii) complex. Dalton Trans 2018; 47:859-867. [DOI: 10.1039/c7dt04335j] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A field-induced CoII single-ion magnet is described. Supramolecular effects on magnetic anisotropy, and the relaxation mechanism are discussed.
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Affiliation(s)
- Darunee Sertphon
- Functional Materials and Nanotechnology Centre of Excellence
- Walailak University
- Thasala
- Thailand
| | | | | | - Jesús Jover
- Departament de Química Inorgànica and Institut de Química Teòrica i Computacional
- Universitat de Barcelona
- E-08028 Barcelona
- Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica and Institut de Química Teòrica i Computacional
- Universitat de Barcelona
- E-08028 Barcelona
- Spain
| | - Shane G. Telfer
- MacDiarmid Institute for Advanced Materials and Nanotechnology
- Institute of Fundamental Sciences
- Massey University
- Palmerston North
- New Zealand
| | - Adil Alkaş
- MacDiarmid Institute for Advanced Materials and Nanotechnology
- Institute of Fundamental Sciences
- Massey University
- Palmerston North
- New Zealand
| | - Phimphaka Harding
- Functional Materials and Nanotechnology Centre of Excellence
- Walailak University
- Thasala
- Thailand
| | - David J. Harding
- Functional Materials and Nanotechnology Centre of Excellence
- Walailak University
- Thasala
- Thailand
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21
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Chen L, Zhou J, Cui HH, Yuan AH, Wang Z, Zhang YQ, Ouyang ZW, Song Y. Slow magnetic relaxation influenced by change of symmetry from ideal Ci to D3d in cobalt(ii)-based single-ion magnets. Dalton Trans 2018; 47:2506-2510. [DOI: 10.1039/c7dt04651k] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two mononuclear complexes including the same cation [Co(imidazole)6]2+ and the different symmetries Ci and D3d showed discriminatively slow magnetic relaxation.
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Affiliation(s)
- Lei Chen
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Jianjun Zhou
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Hui-Hui Cui
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Ai-Hua Yuan
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Zhenxing Wang
- Wuhan National High Magnetic Field Center & School of Physics
- Huazhong University of Science and Technology
- Wuhan 430074
- P. R. China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- P. R. China
| | - Zhong-Wen Ouyang
- Wuhan National High Magnetic Field Center & School of Physics
- Huazhong University of Science and Technology
- Wuhan 430074
- P. R. China
| | - You Song
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
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22
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Field-Induced Single-Ion Magnet Behaviour in Two New Cobalt(II) Coordination Polymers with 2,4,6-Tris(4-pyridyl)-1,3,5-triazine. INORGANICS 2017. [DOI: 10.3390/inorganics5040090] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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23
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Potočňák I, Ráczová K, Čižmár E, Váhovská L, Bukrynov O, Vitushkina S, Findoráková L. Low-dimensional compounds containing cyanido groups. Part XXXII. Field-induced multiple slow magnetic relaxation in [Co II (dcnm)(H 2 O)(phen) 2 ](dcnm) complex with dominant easy-plane anisotropy (dcnm = dicyanonitrosomethanide). Polyhedron 2017. [DOI: 10.1016/j.poly.2017.08.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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24
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Cucos P, Sorace L, Maxim C, Shova S, Patroi D, Caneschi A, Andruh M. Cobalt(II) Ions Connecting [Co II4] Helicates into a 2-D Coordination Polymer Showing Slow Relaxation of the Magnetization. Inorg Chem 2017; 56:11668-11675. [PMID: 28915022 DOI: 10.1021/acs.inorgchem.7b01640] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reactions of cobalt(II) perchlorate with a diazine tetratopic helicand, H4L, in the presence of sodium carbonate afford two coordination polymers constructed from tetranuclear anionic helicates as building blocks: ∞3[Co4L3Na4(H2O)4]·4H2O (1) and ∞2[Co5L3Na2(H2O)9]·2.7H2O·DMF (2). The tetranuclear triple-stranded helicates, {CoII4L3}4-, are connected in 1 by sodium(I) ions and in 2 by sodium(I) and cobalt(II) ions (H4L results from the condensation reaction between 3-formylsalicylic acid and hydrazine). The crystal structures of the two compounds have been solved. In both compounds the anionic helicates interact with the assembling cations through the carboxylato oxygen atoms. Compound 2 features chains resulting from connecting the tetranuclear helicates through cobalt(II) ions. The analysis of the magnetic properties of compounds 1 and 2 evidenced a dominant antiferromagnetic coupling for 1, resulting in a diamagnetic ground state. In contrast, the magnetic behavior of 2 is dominated at low temperature by the CoII ion which connects the antiferromagnetically coupled {CoII4} helical moieties. The ac magnetic measurements for 2 reveal the occurrence of slow relaxation of the magnetization that is due to the single, uncorrelated cobalt(II) ions, which are diluted in an essentially diamagnetic matrix of {CoII4} moieties (ΔEeff = 26.7 ± 0.3 cm-1 with τ0 = (2.3 ± 0.2) × 10-6 s).
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Affiliation(s)
- Paula Cucos
- Ilie Murgulescu-Institute of Physical Chemistry of the Romanian Academy , Splaiul Independentei no. 202, 060021 Bucharest, Romania
| | - Lorenzo Sorace
- Department of Chemistry "U. Schiff" and INSTM RU, University of Florence , Via della Lastruccia 3, 50019 Florence, Italy
| | - Catalin Maxim
- University of Bucharest , Faculty of Chemistry, Inorganic Chemistry Laboratory, Str. Dumbrava Rosie no. 23, 020464 Bucharest, Romania
| | - Sergiu Shova
- Petru Poni, Institute of Macromolecular Chemistry , Aleea Grigore Ghica Voda 41A, RO-700487 Iasi, Romania
| | - Delia Patroi
- National Institute for R&D in Electrical Engineering INCDIE ICPE-CA , Splaiul Unirii no. 313, 030138 Bucharest, Romania
| | - Andrea Caneschi
- Department of Chemistry "U. Schiff" and INSTM RU, University of Florence , Via della Lastruccia 3, 50019 Florence, Italy
| | - Marius Andruh
- University of Bucharest , Faculty of Chemistry, Inorganic Chemistry Laboratory, Str. Dumbrava Rosie no. 23, 020464 Bucharest, Romania
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25
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McAdams SG, Ariciu AM, Kostopoulos AK, Walsh JP, Tuna F. Molecular single-ion magnets based on lanthanides and actinides: Design considerations and new advances in the context of quantum technologies. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.03.015] [Citation(s) in RCA: 222] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Palacios MA, Nehrkorn J, Suturina EA, Ruiz E, Gómez‐Coca S, Holldack K, Schnegg A, Krzystek J, Moreno JM, Colacio E. Analysis of Magnetic Anisotropy and the Role of Magnetic Dilution in Triggering Single‐Molecule Magnet (SMM) Behavior in a Family of Co
II
Y
III
Dinuclear Complexes with Easy‐Plane Anisotropy. Chemistry 2017; 23:11649-11661. [DOI: 10.1002/chem.201702099] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Indexed: 11/10/2022]
Affiliation(s)
- María A. Palacios
- Departamento de Química Inorgánica Facultad de Ciencias Universidad de Granada 18071 Granada Spain
| | - Joscha Nehrkorn
- Department of Chemistry University of Washington Box 351700 Seattle WA 98195 USA
- Berlin Joint EPR Lab Institute for Nanospectroscopy Helmholtz-Zentrum Berlin für Materialien und Energie Kekuléstrassee 5 12489 Berlin Germany
| | | | - Eliseo Ruiz
- Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
| | - Silvia Gómez‐Coca
- Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
| | - Karsten Holldack
- Berlin Joint EPR Lab Institute for Nanospectroscopy Helmholtz-Zentrum Berlin für Materialien und Energie Kekuléstrassee 5 12489 Berlin Germany
| | - Alexander Schnegg
- Berlin Joint EPR Lab Institute for Nanospectroscopy Helmholtz-Zentrum Berlin für Materialien und Energie Kekuléstrassee 5 12489 Berlin Germany
| | - Jurek Krzystek
- National High Magnetic Field Laboratory Florida State University Tallahassee FL 32310 USA
| | - José M. Moreno
- Departamento de Química Inorgánica Facultad de Ciencias Universidad de Granada 18071 Granada Spain
| | - Enrique Colacio
- Departamento de Química Inorgánica Facultad de Ciencias Universidad de Granada 18071 Granada Spain
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27
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Pavlov AA, Savkina SA, Belov AS, Nelyubina YV, Efimov NN, Voloshin YZ, Novikov VV. Trigonal Prismatic Tris-pyridineoximate Transition Metal Complexes: A Cobalt(II) Compound with High Magnetic Anisotropy. Inorg Chem 2017; 56:6943-6951. [DOI: 10.1021/acs.inorgchem.7b00447] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexander A. Pavlov
- Nesmeyanov Institute
of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia
| | - Svetlana A. Savkina
- Nesmeyanov Institute
of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia
| | - Alexander S. Belov
- Nesmeyanov Institute
of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia
| | - Yulia V. Nelyubina
- Nesmeyanov Institute
of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia
- Kurnakov Institute
of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp., 31, 117901, Moscow, Russia
| | - Nikolay N. Efimov
- Kurnakov Institute
of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp., 31, 117901, Moscow, Russia
| | - Yan Z. Voloshin
- Nesmeyanov Institute
of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia
- Kurnakov Institute
of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp., 31, 117901, Moscow, Russia
| | - Valentin V. Novikov
- Nesmeyanov Institute
of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia
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28
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Yang L, Li J, Pu TC, Kong M, Song Y. Metal-ion induced ferromagnetic polarization in a mixed-spin system. Dalton Trans 2017; 46:6670-6676. [PMID: 28484761 DOI: 10.1039/c7dt00753a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three new 3d-3d heterometallic complexes, [CuMII(hmb)6(OH)]ClO4·H2O (M = Zn (1), Ni (2) and Co (3)) (Hhmb = 2-hydroxy-3-methoxy-benzaldehyde), have been synthesized. Structural analysis reveals that the three complexes are isostructural. Three CuII ions are in a perfect trigonal geometrical frustration and form a tetrahedral frustrated system with the introduced fourth ion ZnII/NiII/CoII. Magnetic studies indicate the antiferromagnetic coupling between metal ions in all 1, 2 and 3. Due to the geometrical frustration, spin-frustrated magnetism is also a typical feature of 1-3 and the magnetostructural correlation is far more complicated than their structures. The detailed magnetic investigation found that the ground state spin of 2 cannot be simply determined by the antiferromagnetically linear arrangement of spins, because the strong antiferromagnetic coupling between CuII and NiII ions quenches the spin frustration and ferromagnetically polarizes the spins of the [Cu] unit. Contrarily, the antiferromagnetic coupling between CuII and CoII ions is not strong enough in 3, so there is no similar behaviour compared to 2.
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Affiliation(s)
- Li Yang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
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29
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Sakiyama H, Sudo R, Abiko T, Yoshioka D, Mitsuhashi R, Omote M, Mikuriya M, Yoshitake M, Koikawa M. Magneto-structural correlation of hexakis-dmso cobalt(ii) complex. Dalton Trans 2017; 46:16306-16314. [DOI: 10.1039/c7dt03269b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The magnetostructural correlation of the hexakis-dmso cobalt(ii) complex, [Co(dmso)6](BPh4)2 (dmso: dimethylsulfoxide), was investigated by single-crystal X-ray diffraction study and magnetic measurements.
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Affiliation(s)
- Hiroshi Sakiyama
- Department of Science
- Faculty of Science
- Yamagata University
- Yamagata 990-8560
- Japan
| | - Reiji Sudo
- Department of Science
- Faculty of Science
- Yamagata University
- Yamagata 990-8560
- Japan
| | - Takaaki Abiko
- Department of Science
- Faculty of Science
- Yamagata University
- Yamagata 990-8560
- Japan
| | - Daisuke Yoshioka
- Department of Applied Chemistry for Environment
- School of Science and Technology
- Kwansei Gakuin University
- Sanda 669-1337
- Japan
| | - Ryoji Mitsuhashi
- Department of Applied Chemistry for Environment
- School of Science and Technology
- Kwansei Gakuin University
- Sanda 669-1337
- Japan
| | - Masataka Omote
- Department of Applied Chemistry for Environment
- School of Science and Technology
- Kwansei Gakuin University
- Sanda 669-1337
- Japan
| | - Masahiro Mikuriya
- Department of Applied Chemistry for Environment
- School of Science and Technology
- Kwansei Gakuin University
- Sanda 669-1337
- Japan
| | - Megumi Yoshitake
- Department of Chemistry and Applied Chemistry
- Graduate School of Science and Engineering
- Saga University
- Saga 840-8502
- Japan
| | - Masayuki Koikawa
- Department of Chemistry and Applied Chemistry
- Graduate School of Science and Engineering
- Saga University
- Saga 840-8502
- Japan
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30
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Korchagin DV, Palii AV, Yureva EA, Akimov AV, Misochko EY, Shilov GV, Talantsev AD, Morgunov RB, Shakin AA, Aldoshin SM, Tsukerblat BS. Evidence of field induced slow magnetic relaxation in cis-[Co(hfac)2(H2O)2] exhibiting tri-axial anisotropy with a negative axial component. Dalton Trans 2017; 46:7540-7548. [DOI: 10.1039/c7dt01236e] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
We report a combined experimental characterization and theoretical modeling of the hexa-coordinated high-spin Co(ii) complex cis-[Co(hfac)2(H2O)2] (I).
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Affiliation(s)
| | - Andrew V. Palii
- Institute of Problems of Chemical Physics
- Chernogolovka
- Russia
- Institute of Applied Physics
- Academy of Sciences of Moldova
| | - Elena A. Yureva
- Institute of Problems of Chemical Physics
- Chernogolovka
- Russia
| | | | | | | | | | | | | | | | - Boris S. Tsukerblat
- Department of Chemistry
- Ben-Gurion University of the Negev
- Beer-Sheva 84105
- Israel
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31
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Rams M, Tomkowicz Z, Böhme M, Plass W, Suckert S, Werner J, Jess I, Näther C. Influence of metal coordination and co-ligands on the magnetic properties of 1D Co(NCS)2 coordination polymers. Phys Chem Chem Phys 2017; 19:3232-3243. [DOI: 10.1039/c6cp08193b] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two 1D Co(NCS)2 coordination polymers were synthesized and their magnetic properties were investigated by susceptibility and specific heat measurements as well as DFT and ab initio calculations.
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Affiliation(s)
- Michał Rams
- Institute of Physics
- Jagiellonian University
- Łojasiewicza 11
- 30-348 Kraków
- Poland
| | - Zbigniew Tomkowicz
- Institute of Physics
- Jagiellonian University
- Łojasiewicza 11
- 30-348 Kraków
- Poland
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie
- Universität Jena
- Humboldtstr. 8
- 07743 Jena
- Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie
- Universität Jena
- Humboldtstr. 8
- 07743 Jena
- Germany
| | - Stefan Suckert
- Institut für Anorganische Chemie
- Christian-Albrechts-Universität zu Kiel
- Max-Eyth-Straße 2
- 24118 Kiel
- Germany
| | - Julia Werner
- Institut für Anorganische Chemie
- Christian-Albrechts-Universität zu Kiel
- Max-Eyth-Straße 2
- 24118 Kiel
- Germany
| | - Inke Jess
- Institut für Anorganische Chemie
- Christian-Albrechts-Universität zu Kiel
- Max-Eyth-Straße 2
- 24118 Kiel
- Germany
| | - Christian Näther
- Institut für Anorganische Chemie
- Christian-Albrechts-Universität zu Kiel
- Max-Eyth-Straße 2
- 24118 Kiel
- Germany
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32
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Palii AV, Korchagin DV, Yureva EA, Akimov AV, Misochko EY, Shilov GV, Talantsev AD, Morgunov RB, Aldoshin SM, Tsukerblat BS. Single-Ion Magnet Et4N[CoII(hfac)3] with Nonuniaxial Anisotropy: Synthesis, Experimental Characterization, and Theoretical Modeling. Inorg Chem 2016; 55:9696-9706. [DOI: 10.1021/acs.inorgchem.6b01473] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Andrew V. Palii
- Institute of Problems of Chemical Physics, Chernogolovka, Moscow Region, Russia
- Institute
of Applied Physics, Academy of Sciences of Moldova, Chisinau, Moldova
| | - Denis V. Korchagin
- Institute of Problems of Chemical Physics, Chernogolovka, Moscow Region, Russia
| | - Elena A. Yureva
- Institute of Problems of Chemical Physics, Chernogolovka, Moscow Region, Russia
| | - Alexander V. Akimov
- Institute of Problems of Chemical Physics, Chernogolovka, Moscow Region, Russia
| | | | - Gennady V. Shilov
- Institute of Problems of Chemical Physics, Chernogolovka, Moscow Region, Russia
| | - Artem D. Talantsev
- Institute of Problems of Chemical Physics, Chernogolovka, Moscow Region, Russia
| | - Roman B. Morgunov
- Institute of Problems of Chemical Physics, Chernogolovka, Moscow Region, Russia
| | - Sergey M. Aldoshin
- Institute of Problems of Chemical Physics, Chernogolovka, Moscow Region, Russia
| | - Boris S. Tsukerblat
- Department
of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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