1
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Manu Manohar E, Roy S, Li XL, Tothadi S, Mok JG, Tang J, Herchel R, Lee J, Dey A, Das S. Halide mediated modulation of magnetic interaction and anisotropy in dimeric Co(II) complexes. Dalton Trans 2024; 53:10499-10510. [PMID: 38841816 DOI: 10.1039/d4dt00927d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
The burgeoning interest in the field of molecular magnetism is to perceive the high magnetic anisotropy in different geometries of metal complexes and hence to draw a magneto-structural correlation. Despite a handful of examples to exemplify the magnetic anisotropy in various coordination geometries of mononuclear complexes, the magnetic anisotropies for two different coordination geometries are underexplored. Employing an appropriate synthetic strategy utilizing the ligand LH2 [2,2'-{(1E,1'E)-pyridine2,6-diyl-bis(methaneylylidine)}-bis(azaneylylidine)diphenol] and cobalt halide salts in a 1 : 2 stoichiometric ratio in the presence of triethylamine allowed us to report a new family of dinuclear cobalt complexes [CoII2X2(L)(P)(Q)]·S with varying terminal halides [X = Cl, P = CH3CN, Q = H2O, S = H2O (1), X = Br, P = CH3CN, Q = H2O, S = H2O (2), X = I, P = CH3CN, and Q = CH3CN (3)]. All these complexes are characterized through single crystal X-ray crystallography, which reveals their crystallization in the monoclinic system P21/n space group with nearly identical structural features. These complexes share vital components, including Co(II) centers, a fully deprotonated ligand [L]2-, halide ions, and solvent molecules. The [L]2- ligand contains two Co(II) centers, where phenolate oxygen atoms bridge the Co(II) centers, forming a Co2O2 four-membered ring. Co1 demonstrates a distorted pentagonal-bipyramidal geometry with axial positions for solvent molecules, while Co2 displays a distorted tetrahedral geometry involving phenolate oxygen atoms and halide ions. Temperature-dependent dc magnetic susceptibility measurements were conducted on 1-3 within a range of 2 to 300 K at 1 kOe. The χmT vs. T plots exhibit similar trends, with χmT values at 300 K higher than the spin-only value, signifying a significant orbital contribution. As the temperature decreases, χmT decreases smoothly in all the complexes; however, no clear saturation at low temperatures is observed. Field-dependent magnetization measurements indicate a rapid increase below 20 kOe, with no hysteresis and a low magnetic blocking temperature. DFT and CASSCF/NEVPT2 theoretical calculations were performed to perceive the magnetic interaction and single-ion anisotropies of Co(II) ions in various ligand-field environments.
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Affiliation(s)
- Ezhava Manu Manohar
- Department of Basic Sciences, Chemistry Discipline, Institute of Infrastructure Technology Research and Management, Near Khokhra Circle, Maninagar East, Ahmedabad-380026, Gujarat, India.
| | - Soumalya Roy
- Department of Chemistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea.
| | - Xiao-Lei Li
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, China.
| | - Srinu Tothadi
- Analytical and Environmental Sciences Division and Centralized Instrumentation Facility, CSIR-Central Salt and Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar 364002, India
| | - Jun-Gwi Mok
- Department of Chemistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea.
| | - Jinkui Tang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, China.
| | - Radovan Herchel
- Department of Inorganic Chemistry, Faculty of Science, Palacký University, 77900 Olomouc, Czech Republic.
| | - Junseong Lee
- Department of Chemistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea.
| | - Atanu Dey
- Department of Chemistry, Gandhi Institute of Technology and Management (GITAM), NH 207, Nagadenehalli, Doddaballapur Taluk, Bengaluru, 561203 Karnataka, India.
| | - Sourav Das
- Department of Basic Sciences, Chemistry Discipline, Institute of Infrastructure Technology Research and Management, Near Khokhra Circle, Maninagar East, Ahmedabad-380026, Gujarat, India.
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2
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Corredoira-Vázquez J, Oreiro-Martínez P, Nieto-Pastoriza D, García-Deibe AM, Sanmartín-Matalobos J, Fondo M. Dy 4, Dy 5, and Ho 2 Complexes of an N3O2 Aminophenol Donor: A Dy 5-µ 3-Peroxide Single Molecule Magnet. Int J Mol Sci 2023; 24:ijms24109061. [PMID: 37240407 DOI: 10.3390/ijms24109061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/26/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
The reactivity of the new flexible potentially pentadentate N3O2 aminophenol ligand H4Lr (2,2'-((pyridine-2,6-diylbis(methylene))bis(azanediyl))diphenol) towards different dysprosium salts and holmium(III) nitrate was investigated. Accordingly, this reactivity seems to greatly depend on the metal ion and salt employed. In this way, the reaction of H4Lr with dysprosium(III) chloride in air leads to the oxo-bridged tetranuclear complex [Dy4(H2Lr)3(Cl)4(μ3-O)(EtOH)2(H2O)2]·2EtOH·H2O (1·2EtOH·H2O), while the same reaction just changing the chloride salt by the nitrate one renders the peroxo-bridged pentanuclear compound [Dy5(H2Lr)2(H2.5Lr)2(NO3)4(µ3-O2)2]·2H2O (2·2H2O), where both peroxo ligands seem to come from the fixation and reduction of atmospheric oxygen. However, if holmium(III) nitrate is used instead of dysprosium(III) nitrate, no evidence of a peroxide ligand is observed, and the dinuclear complex {[Ho2(H2Lr)(H3Lr)(NO3)2(H2O)2](NO3)} 2.5H2O (3·2.5H2O) is isolated. The three complexes were unequivocally characterized by X-ray diffraction techniques, and their magnetic properties were analyzed. Thus, while the Dy4 and Ho2 complexes do not show magnet-like behavior even in the presence of an external magnetic field, 2·2H2O is a single molecule magnet, with an Ueff barrier of 61.2 K (43.2 cm-1). This is the first homonuclear lanthanoid peroxide SMM, which also shows the highest barrier among the reported 4f/3d peroxide zero field SMMs to date.
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Affiliation(s)
- Julio Corredoira-Vázquez
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
- Phantom-g, CICECO-Aveiro Institute of Materials, Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Paula Oreiro-Martínez
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Daniel Nieto-Pastoriza
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Ana M García-Deibe
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Jesús Sanmartín-Matalobos
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
- Institute of Materials (iMATUS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Matilde Fondo
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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3
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Corredoira-Vázquez J, González-Barreira C, Fondo M, García-Deibe AM, Sanmartín-Matalobos J, Gómez-Coca S, Ruiz E, Colacio E. Dinuclear Fluoride Single-Bridged Lanthanoid Complexes as Molecule Magnets: Unprecedented Coupling Constant in a Fluoride-Bridged Gadolinium Compound. Inorg Chem 2022; 61:9946-9959. [PMID: 35737854 PMCID: PMC9275779 DOI: 10.1021/acs.inorgchem.2c00773] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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A new synthetic method
allows isolating fluoride-bridged complexes
Bu4N{[M(3NO2,5Br-H3L1,1,4)]2(μ-F)} (M = Dy, 1; M = Ho, 2; M = Gd, 3) and Bu4N{[Dy(3Br,5Cl-H3L1,2,4)]2(μ-F)}·2H2O, 4·2H2O. The crystal structures of 1·5CH3C6H5,·2·2H2O·0.75THF, 3, and 4·2H2O·2THF show that all of them are
dinuclear compounds with linear single fluoride bridges and octacoordinated
metal centers. Magnetic susceptibility measurements in the temperature
range of 2–300 K reveal that the GdIII ions in 3 are weakly antiferromagnetically coupled, and this constitutes
the first crystallographically and magnetically analyzed gadolinium
complex with a fluoride bridge. Variable-temperature magnetization
demonstrates a poor magnetocaloric effect for 3. Alternating
current magnetic measurements for 1, 2,
and 4·2H2O bring to light that 4·2H2O is an SMM, 1 shows an
SMM-like behavior under a magnetic field of 600 Oe, while 2 does not show relaxation of the magnetization even under an applied
magnetic field. In spite of this, 2 is the first fluoride-bridged
holmium complex magnetically analyzed. DFT and ab initio calculations support the experimental magnetic results and show
that apparently small structural differences between 1 and 4·2H2O introduce important changes
in the dipolar interactions, from antiferromagnetic in 1 to ferromagnetic in 4·2H2O. Dinuclear linear fluoride single-bridged
DyIII, HoIII, and GdIII complexes
are systematically
obtained from mononuclear aquo-complexes, with the DyIII ones showing slow relaxation of the magnetization and the GdIII one revealing a weak AF coupling through the Gd−F−Gd
bridge.
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Affiliation(s)
- Julio Corredoira-Vázquez
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Cristina González-Barreira
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Matilde Fondo
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Ana M García-Deibe
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Jesús Sanmartín-Matalobos
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Silvia Gómez-Coca
- Departament de Química Inorgànica i Orgànica, and Institut de Química Teórica i Computacional, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica i Orgànica, and Institut de Química Teórica i Computacional, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Enrique Colacio
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avda Fuentenueva s/n, 18071 Granada, Spain
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4
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Fondo M, Corredoira-Vázquez J, García-Deibe AM, Sanmartín-Matalobos J, Reta D, Colacio E. Eight coordinated mononuclear dysprosium complexes of heptadentate aminophenol ligands: the influence of the phenol substituents and the ancillary donors on the magnetic relaxation. Dalton Trans 2021; 50:15878-15887. [PMID: 34709251 DOI: 10.1039/d1dt02756e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The mononuclear complexes [Dy(3Br,5Cl-H3L1,1,4)(D)]·solvate (D = H2O, solvate = 0.25MeOH, 1W·0.25MeOH; D = Py without solvate, 1Py), and [Dy(3NO2,5Br-H3L1,1,4)(H2O)] (2W) were isolated. The crystal structures of 1W·0.25MeOH, 1Py and 2W·2CH3C6H5 show that the DyIII ion is octacoordinated, in N4O4 or N5O3 environments, with distorted geometries, between square antiprism, biaugmented trigonal prism and triangular dodecahedral. A similar environment for the metal ion is shown in the chiral crystals of the diamagnetic yttrium analogue [Y(3Br,5Cl-H3L1,1,4)(MeOH)] (3M), which were spontaneously resolved. Magnetic analyses of the three dysprosium complexes, and their diluted analogous 1W@Y, 1Py@Y and 2W@Y, reveal that none of them seem to relax through an Orbach mechanism at Hdc = 0. However, the three complexes show Orbach relaxation under Hdc = 1000 Oe, and 1Py is the in-field SIM with the highest energy barrier among these complexes, with a Ueff value of 358 K. Analysis of ac magnetic data shows that the electron-withdrawing substituents on the phenol rings of the aminophenol ligands, as well as the auxiliary oxygen donors from water ligands, reduce the energy barriers of the complexes, which is attributed to a charge reduction in the coordinating atoms of the aminophenol donor. Ab initio calculations support the experimental results.
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Affiliation(s)
- Matilde Fondo
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Julio Corredoira-Vázquez
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Ana M García-Deibe
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Jesús Sanmartín-Matalobos
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Daniel Reta
- Departament de Química Inorgànica i Orgànica, Facultat de Química, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Enrique Colacio
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
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5
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Peters LCJM, Engelkamp H, Zeitler U, Christianen PCM, Tinnemans P, Maan J, Rowan AE. Synthesis and Magnetic Properties of Two‐Step‐Coordination Schiff Base Clusters. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100298] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Laurens C. J. M. Peters
- High Field Magnet Laboratory (HFML – EMFL) Radboud University Toernooiveld 7 6525 ED Nijmegen The Netherlands
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Hans Engelkamp
- High Field Magnet Laboratory (HFML – EMFL) Radboud University Toernooiveld 7 6525 ED Nijmegen The Netherlands
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Uli Zeitler
- High Field Magnet Laboratory (HFML – EMFL) Radboud University Toernooiveld 7 6525 ED Nijmegen The Netherlands
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Peter C. M. Christianen
- High Field Magnet Laboratory (HFML – EMFL) Radboud University Toernooiveld 7 6525 ED Nijmegen The Netherlands
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Paul Tinnemans
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Jan‐Kees Maan
- High Field Magnet Laboratory (HFML – EMFL) Radboud University Toernooiveld 7 6525 ED Nijmegen The Netherlands
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
| | - Alan E. Rowan
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
- Australian Institute for Bioengineering and Nanotechnology (AIBN) The University of Queensland Brisbane Australia
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6
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Fondo M, Corredoira-Vázquez J, García-Deibe AM, Sanmartín-Matalobos J, Gómez-Coca S, Ruiz E, Colacio E. Slow magnetic relaxation in dinuclear dysprosium and holmium phenoxide bridged complexes: a Dy2 single molecule magnet with a high energy barrier. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00152c] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
High axiality in double unsupported phenoxide-bridged DyIII and HoIII complexes promotes slow relaxation of magnetisation and high Ueff of the dysprosium derivative.
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Affiliation(s)
- Matilde Fondo
- Departamento de Química Inorgánica
- Facultade de Química
- Universidade de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - Julio Corredoira-Vázquez
- Departamento de Química Inorgánica
- Facultade de Química
- Universidade de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - Ana M. García-Deibe
- Departamento de Química Inorgánica
- Facultade de Química
- Universidade de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - Jesús Sanmartín-Matalobos
- Departamento de Química Inorgánica
- Facultade de Química
- Universidade de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - Silvia Gómez-Coca
- Departament de Química Inorgànica i Orgànica
- and Institut de Química Teórica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica i Orgànica
- and Institut de Química Teórica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Enrique Colacio
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- 18071 Granada
- Spain
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7
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Fondo M, Corredoira-Vázquez J, García-Deibe AM, Sanmartín-Matalobos J, Amoza M, Botas AMP, Ferreira RAS, Carlos LD, Colacio E. Field-induced slow magnetic relaxation and luminescence thermometry in a mononuclear ytterbium complex. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00637h] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A mononuclear pentagonal bipyramidal YbIII complex functions as a field-induced SIM luminescent thermometer.
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Affiliation(s)
- Matilde Fondo
- Departamento de Química Inorgánica
- Facultade de Química
- Universidade de Santiago de Compostela
- Spain
| | - Julio Corredoira-Vázquez
- Departamento de Química Inorgánica
- Facultade de Química
- Universidade de Santiago de Compostela
- Spain
| | - Ana M. García-Deibe
- Departamento de Química Inorgánica
- Facultade de Química
- Universidade de Santiago de Compostela
- Spain
| | | | - Martín Amoza
- Departamento de Química Inorgánica
- Facultade de Química
- Universidade de Santiago de Compostela
- Spain
| | - Alexandre M. P. Botas
- Phantom-g
- CICECO – Aveiro Institute of Materials
- Department of Physics
- University of Aveiro
- 3810-193 – Aveiro
| | - Rute A. S. Ferreira
- Phantom-g
- CICECO – Aveiro Institute of Materials
- Department of Physics
- University of Aveiro
- 3810-193 – Aveiro
| | - Luís D. Carlos
- Phantom-g
- CICECO – Aveiro Institute of Materials
- Department of Physics
- University of Aveiro
- 3810-193 – Aveiro
| | - Enrique Colacio
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- 18071 Granada
- Spain
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