1
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Dunstan MA, Giansiracusa MJ, Calvello S, Sorace L, Krause-Heuer AM, Soncini A, Mole RA, Boskovic C. Ab initio-based determination of lanthanoid-radical exchange as visualised by inelastic neutron scattering. Chem Sci 2024; 15:4466-4477. [PMID: 38516080 PMCID: PMC10952085 DOI: 10.1039/d3sc04229d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 02/12/2024] [Indexed: 03/23/2024] Open
Abstract
Magnetic exchange coupling can modulate the slow magnetic relaxation in single-molecule magnets. Despite this, elucidation of exchange coupling remains a significant challenge for the lanthanoid(iii) ions, both experimentally and computationally. In this work, the crystal field splitting and 4f-π exchange coupling in the erbium-semiquinonate complex [ErTp2dbsq] (Er-dbsq; Tp- = hydro-tris(1-pyrazolyl)borate, dbsqH2 = 3,5-di-tert-butyl-1,2-semiquinone) have been determined by inelastic neutron scattering (INS), magnetometry, and CASSCF-SO ab initio calculations. A related complex with a diamagnetic ligand, [ErTp2trop] (Er-trop; tropH = tropolone), has been used as a model for the crystal field splitting in the absence of coupling. Magnetic and INS data indicate antiferromagnetic exchange for Er-dbsq with a coupling constant of Jex = -0.23 meV (-1.8 cm-1) (-2Jex formalism) and good agreement is found between theory and experiment, with the low energy magnetic and spectroscopic properties well modelled. Most notable is the ability of the ab initio modelling to reproduce the signature of interference between localised 4f states and delocalised π-radical states that is evident in the Q-dependence of the exchange excitation. This work highlights the power of combining INS with EPR and magnetometry for determination of ground state properties, as well as the enhanced capability of CASSCF-SO ab initio calculations and purposely developed ab initio-based theoretical models. We deliver an unprecedentedly detailed representation of the entangled character of 4f-π exchange states, which is obtained via an accurate image of the spin-orbital transition density between the 4f-π exchange coupled wavefunctions.
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Affiliation(s)
- Maja A Dunstan
- School of Chemistry, The University of Melbourne Parkville VIC 3010 Australia
| | | | - Simone Calvello
- School of Chemistry, The University of Melbourne Parkville VIC 3010 Australia
- Australian Nuclear Science and Technology Organisation, Locked Bag 2001 Kirrawee DC 2232 Australia
| | - Lorenzo Sorace
- INFN Sez. di Firenze, Department of Chemistry, "Ugo Schiff", Università Degli Studi Firenze Via Della Lastruccia, 13 50019 Sesto Fiorentino Italy
| | - Anwen M Krause-Heuer
- Australian Nuclear Science and Technology Organisation, Locked Bag 2001 Kirrawee DC 2232 Australia
| | - Alessandro Soncini
- School of Chemistry, The University of Melbourne Parkville VIC 3010 Australia
- Department of Chemical Sciences, University of Padova Via Marzolo 1 35131 Padova Italy
| | - Richard A Mole
- Australian Nuclear Science and Technology Organisation, Locked Bag 2001 Kirrawee DC 2232 Australia
| | - Colette Boskovic
- School of Chemistry, The University of Melbourne Parkville VIC 3010 Australia
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2
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Kawaguchi R, Hashimoto K, Kakudate T, Katoh K, Yamashita M, Komeda T. Spatially Resolving Electron Spin Resonance of π-Radical in Single-molecule Magnet. NANO LETTERS 2023; 23:213-219. [PMID: 36585948 PMCID: PMC9838557 DOI: 10.1021/acs.nanolett.2c04049] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 12/27/2022] [Indexed: 06/17/2023]
Abstract
The spintronic properties of magnetic molecules have attracted significant scientific attention. Special emphasis has been placed on the qubit for quantum information processing. The single-molecule magnet bis(phthalocyaninato (Pc)) Tb(III) (TbPc2) is one of the best examined cases in which the delocalized π-radical electron spin of the Pc ligand plays the key role in reading and intermediating the localized Tb spin qubits. We utilized the electron spin resonance (ESR) technique implemented on a scanning tunneling microscope (STM) and use it to measure local the ESR of a single TbPc2 molecule decoupled from the Cu(100) substrate by a two-monolayer NaCl film to identify the π-radical spin. We detected the ESR signal at the ligand positions under the resonance condition expected for an S = 1/2 spin. The results reveal that the π-radical electron is delocalized within the ligands and exhibits intramolecular coupling susceptible to the chemical environment.
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Affiliation(s)
- Ryo Kawaguchi
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, Sendai980-0877, Japan
| | - Katsushi Hashimoto
- Department
of Physics, Graduate School of Sciences, Tohoku University, Sendai980-8578, Japan
- Center
for Science and Innovation in Spintronics (Core Research Cluster), Tohoku University, Sendai980-8577, Japan
| | - Toshiyuki Kakudate
- Department
of Industrial Systems Engineering, National
Institute of Technology (KOSEN), Hachinohe
College, 16-1 Uwanotai, Tamonoki, Hachinohe039-1192, Japan
| | - Keiichi Katoh
- Department
of Chemistry, Graduate School of Science, Josai University, Sakado, Saitama350-0295, Japan
| | - Masahiro Yamashita
- Department
of Chemistry, Graduate School of Science, Tohoku University, Sendai980-8578, Japan
- School
of Materials Science and Engineering, Nankai
University, Tianjin300350, People’s Republic of China
| | - Tadahiro Komeda
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, Sendai980-0877, Japan
- Center
for Science and Innovation in Spintronics (Core Research Cluster), Tohoku University, Sendai980-8577, Japan
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3
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Shahed SM, Ara F, Hossain MI, Katoh K, Yamashita M, Komeda T. Observation of Yu-Shiba-Rusinov States and Inelastic Tunneling Spectroscopy for Intramolecule Magnetic Exchange Interaction Energy of Terbium Phthalocyanine (TbPc) Species Adsorbed on Superconductor NbSe 2. ACS NANO 2022; 16:7651-7661. [PMID: 35467334 PMCID: PMC9134493 DOI: 10.1021/acsnano.1c11221] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 04/21/2022] [Indexed: 06/14/2023]
Abstract
We investigated the spin properties of the terbium phthalocyanine (TbPc) species adsorbed on the superconductor NbSe2 surface using scanning tunneling microscopy and spectroscopy. TbPc2 is a molecule in a class of single-molecule magnets (SMMs), and the use of superconductor electrodes attracts attention for the application to the devices using the spin degree of freedom. TbPc is a building block of TbPc2 and can reveal the spin component's behavior. In the experiment, TbPc species were placed on the surface of the superconductor NbSe2. We measured Yu-Shiba-Rusinov (YSR) states caused by the interaction between the superconducting state and magnetic impurity and inelastic tunneling spectroscopy (IETS) for the spin excitation, below 1 K. We also measured the Kondo state formed by the magnetic singlet formation. We detected the radical spin at the ligand position of the TbPc by the presence of the Kondo peak and demonstrated that the radical spin forms the YSR feature. In addition, the exchange interaction energy (Eex) between the spins of the radical ligand (Pc) and the center 4f metal atom (Tb3+) is determined by using the IETS technique. Eex is a critical parameter that determines the blocking temperature, below which the sample behaves as an SMM. IETS results show that the statistical distribution of Eex has peaked at 1.3, 1.6, and 1.9 meV. The energy range is comparable to the recent theoretical calculation result. In addition, we show that the energy variation is correlated with the bonding configuration of TbPc.
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Affiliation(s)
- Syed Mohammad
Fakruddin Shahed
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 9800877, Japan
| | - Ferdous Ara
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 9800877, Japan
| | - Mohammad Ikram Hossain
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 9800877, Japan
| | - Keiichi Katoh
- Department
of Chemistry, Graduate School of Science, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan
| | - Masahiro Yamashita
- Department
of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aza-Aoba, Aoba-Ku, Sendai 980-8578, Japan
- School
of Materials Science and Engineering, Nankai
University, Tianjin 300350, China
| | - Tadahiro Komeda
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 9800877, Japan
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4
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Bai F, Yao B, Wang R, Wang W, Wang Q, Ma Y, Li L. Structures and magnetic properties of five lanthanide-radical complexes constructed by 8-methoxyquinoline substituted tridentate chelating nitronyl nitroxide radical. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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5
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Molecular S = 2 High-Spin, S = 0 Low-Spin and S = 0 ⇄ 2 Spin-Transition/-Crossover Nickel(II)-Bis(nitroxide) Coordination Compounds. INORGANICS 2021. [DOI: 10.3390/inorganics9020010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Heterospin systems have a great advantage in frontier orbital engineering since they utilize a wide diversity of paramagnetic chromophores and almost infinite combinations and mutual geometries. Strong exchange couplings are expected in 3d–2p heterospin compounds, where the nitroxide (aminoxyl) oxygen atom has a direct coordination bond with a nickel(II) ion. Complex formation of nickel(II) salts and tert-butyl 2-pyridyl nitroxides afforded a discrete 2p–3d–2p triad. Ferromagnetic coupling is favored when the magnetic orbitals, nickel(II) dσ and radical π*, are arranged in a strictly orthogonal fashion, namely, a planar coordination structure is characterized. In contrast, a severe twist around the coordination bond gives an orbital overlap, resulting in antiferromagnetic coupling. Non-chelatable nitroxide ligands are available for highly twisted and practically diamagnetic complexes. Here, the Ni–O–N–Csp2 torsion (dihedral) angle is supposed to be a useful metric to describe the nickel ion dislocated out of the radical π* nodal plane. Spin-transition complexes exhibited a planar coordination structure in a high-temperature phase and a nonplanar structure in a low-temperature phase. The gradual spin transition is described as a spin equilibrium obeying the van’t Hoff law. Density functional theory calculation indicates that the energy level crossing of the high- and low-spin states. The optimized structures of diamagnetic and high-spin states well agreed with the experimental large and small torsions, respectively. The novel mechanism of the present spin transition lies in the ferro-/antiferromagnetic coupling switch. The entropy-driven mechanism is plausible after combining the results of the related copper(II)-nitroxide compounds. Attention must be paid to the coupling parameter J as a variable of temperature in the magnetic analysis of such spin-transition materials. For future work, the exchange coupling may be tuned by chemical modification and external stimulus, because it has been clarified that the parameter is sensitive to the coordination structure and actually varies from 2J/kB = +400 K to −1400 K.
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6
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Gould CA, Mu E, Vieru V, Darago LE, Chakarawet K, Gonzalez MI, Demir S, Long JR. Substituent Effects on Exchange Coupling and Magnetic Relaxation in 2,2′-Bipyrimidine Radical-Bridged Dilanthanide Complexes. J Am Chem Soc 2020; 142:21197-21209. [DOI: 10.1021/jacs.0c10612] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | | | - Veacheslav Vieru
- Theory of Nanomaterials Group, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | | | | | | | - Selvan Demir
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Jeffrey R. Long
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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7
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Kyoden Y, Ishida T. A Hidden Coordination-Bond Torsional Deformation as a Sign of Possible Spin Transition in Nickel(II)-Bis(nitroxide) Compounds. Molecules 2020; 25:E3790. [PMID: 32825395 PMCID: PMC7503645 DOI: 10.3390/molecules25173790] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 08/13/2020] [Accepted: 08/18/2020] [Indexed: 11/17/2022] Open
Abstract
Complex formation of nickel(II) tetrafluoroborate and tert-butyl 5-phenyl-2-pyridyl nitroxide (phpyNO) in the presence of sodium cyanate gave a discrete molecule [Ni(phpyNO)2(X)2] (X = NCO). The Ni-O-N-Csp2 torsion angles were reduced on heating; 33.5(5)° and 36.2(4)° at 100 K vs. 25.7(10)° and 32.3(11)° at 400 K. The magnetic behavior was almost diamagnetic below ca. 100 K, and the χmT value reached 1.04 cm3 K mol-1 at 400 K. An analysis using the van't Hoff equation indicates a possible spin transition at T1/2 >> 400 K. Density functional theory calculation shows that the singlet-quintet energy gap decreases as the structural change from 100 to 400 K. The geometry optimization results suggest that the diamagnetic state has the Ni-O-N-Csp2 torsion angles of 32.7° while the Stotal = 2 state has those of 11.9°. The latter could not be experimentally observed even at 400 K. After overviewing the results on the known X = Br, Cl, and NCS derivatives, the magnetic behavior is described in a common phase diagram. The Br and Cl compounds undergo the energy level crossing of the high-/low-spin states, but the NCS and NCO compounds do not in a conventional experimental temperature range. The spin transition mechanism in this series involves the exchange coupling switch between ferro- and antiferromagnetic interactions, corresponding to the high- and low-spin phases, respectively.
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Affiliation(s)
| | - Takayuki Ishida
- Department of Engineering Science, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan;
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8
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Moseley DH, Stavretis SE, Zhu Z, Guo M, Brown CM, Ozerov M, Cheng Y, Daemen LL, Richardson R, Knight G, Thirunavukkuarasu K, Ramirez-Cuesta AJ, Tang J, Xue ZL. Inter-Kramers Transitions and Spin-Phonon Couplings in a Lanthanide-Based Single-Molecule Magnet. Inorg Chem 2020; 59:5218-5230. [PMID: 32196322 PMCID: PMC7935416 DOI: 10.1021/acs.inorgchem.0c00523] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Spin-phonon coupling plays a critical role in magnetic relaxation in single-molecule magnets (SMMs) and molecular qubits. Yet, few studies of its nature have been conducted. Phonons here refer to both intermolecular and intramolecular vibrations. In the current work, we show spin-phonon couplings between IR-active phonons in a lanthanide molecular complex and Kramers doublets (from the crystal field). For the SMM Er[N(SiMe3)2]3 (1, Me = methyl), the couplings are observed in the far-IR magnetospectroscopy (FIRMS) of crystals with coupling constants ≈ 2-3 cm-1. In particular, one of the magnetic excitations couples to at least two phonon excitations. The FIRMS reveals at least three magnetic excitations (within the 4I15/2 ground state/manifold; hereafter, manifold) at 0 T at 104, ∼180, and 245 cm-1, corresponding to transitions from the ground state, MJ = ±15/2, to the first three excited states, MJ = ±13/2, ±11/2, and ±9/2, respectively. The transition between the ground and first excited Kramers doublet in 1 is also observed in inelastic neutron scattering (INS) spectroscopy, moving to a higher energy with an increasing magnetic field. INS also gives complete phonon spectra of 1. Periodic DFT computations provide the energies of all phonon excitations, which compare well with the spectra from INS, supporting the assignment of the inter-Kramers doublet (magnetic) transitions in the spectra. The current studies unveil and measure the spin-phonon couplings in a typical lanthanide complex and throw light on the origin of the spin-phonon entanglement.
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Affiliation(s)
- Duncan H Moseley
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Shelby E Stavretis
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Zhenhua Zhu
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Mei Guo
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Craig M Brown
- Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Mykhaylo Ozerov
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Yongqiang Cheng
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Luke L Daemen
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Rachael Richardson
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307, United States
| | - Gary Knight
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307, United States
| | | | - Anibal J Ramirez-Cuesta
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jinkui Tang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Zi-Ling Xue
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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9
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Spectroscopic Studies of the Magnetic Excitation and Spin‐Phonon Couplings in a Single‐Molecule Magnet. Chemistry 2019; 25:15846-15857. [DOI: 10.1002/chem.201903635] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Indexed: 12/11/2022]
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10
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Kyoden Y, Homma Y, Ishida T. High-Spin and Incomplete Spin-Crossover Polymorphs in Doubly Chelated [Ni(L) 2Br 2] (L = tert-Butyl 5-Phenyl-2-pyridyl Nitroxide). Inorg Chem 2019; 58:10743-10755. [PMID: 31368687 DOI: 10.1021/acs.inorgchem.9b00885] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Complexation of nickel(II) bromide with tert-butyl 5-phenyl-2-pyridyl nitroxide (phpyNO) gave two morphs of doubly chelated [Ni(phpyNO)2Br2] as a 2p-3d-2p heterospin triad. The α phase crystallizes in the orthorhombic space group Pbcn. An asymmetric unit involves a half-molecule. The torsion angle around Ni-O-N-C2py is as small as 6.5(3)° at 100 K and 7.0(6)° at 400 K, guaranteeing an orthogonal arrangement between the magnetic radical π* and metal 3dx2-y2 and 3dz2 orbitals. Magnetic study revealed the high-spin ground state with the exchange coupling constant 2J/kB = +288(5) K, on the basis of a symmetrical spin Hamiltonian. The β phase crystallizes in the monoclinic space group P21/n. The whole molecule is an independent unit. The Ni-O-N-C2py torsion angles are 24.2(6) and 37.2(5)° at 100 K and 10.4(7) and 25.9(6)° at 400 K. A magnetic study revealed a very gradual and nonhysteretic spin transition. An analysis based on the van't Hoff equation gave a successful fit with the spin-crossover temperature of 134(1) K, although the susceptibility did not reach the theoretical high-spin value at 400 K. Density functional theory calculation on the β phase showed ground Stotal = 0 in the low-temperature structure while Stotal = 2 in the high-temperature structure, supporting the synchronized exchange coupling switch on both sides. Consequently, the β phase can be recognized as an "incomplete spin crossover" material, as a result of conflicting thermal depopulation effects in a high-temperature region.
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Affiliation(s)
- Yukiya Kyoden
- Department of Engineering Science , The University of Electro-Communications , Chofu, Tokyo 182-8585 , Japan
| | - Yuta Homma
- Department of Engineering Science , The University of Electro-Communications , Chofu, Tokyo 182-8585 , Japan
| | - Takayuki Ishida
- Department of Engineering Science , The University of Electro-Communications , Chofu, Tokyo 182-8585 , Japan
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11
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Dunstan MA, Mole RA, Boskovic C. Inelastic Neutron Scattering of Lanthanoid Complexes and Single‐Molecule Magnets. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801306] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Maja A. Dunstan
- School of Chemistry University of Melbourne Parkville, Victoria, 3010 Australia
| | - Richard A. Mole
- Australian Centre for Neutron Scattering Australian Nuclear Science and Technology Organisation Locked Bag 2001, Kirrawee DC, NSW, 2232 Australia
| | - Colette Boskovic
- School of Chemistry University of Melbourne Parkville, Victoria, 3010 Australia
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12
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Yang L, Wang X, Zhu M, Xiao T, Ouyang Z, Bian Y, Wang Z, Jiang J. Ferromagnetic coupling between 4f- and delocalized π-radical spins in mixed (phthalocyaninato)(porphyrinato) rare earth double-decker SMMs. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00595a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Ferromagnetic π–f exchange couplings were revealed in [REIII(Pc)(Por)]0 SMMs (RE = Tb and Dy) by HF-EPR measurements.
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Affiliation(s)
- Liguo Yang
- College of Chemistry and Environmental Engineering
- Anyang Institute of Technology
- Anyang 455000
- China
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials
| | - Xin Wang
- College of Chemistry and Environmental Engineering
- Anyang Institute of Technology
- Anyang 455000
- China
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials
| | - Mengliang Zhu
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials
- Department of Chemistry
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Tongtong Xiao
- Wuhan National High Magnetic Field Center & School of Physics
- Huazhong University of Science and Technology
- Wuhan 430074
- China
| | - Zhongwen Ouyang
- Wuhan National High Magnetic Field Center & School of Physics
- Huazhong University of Science and Technology
- Wuhan 430074
- China
| | - Yongzhong Bian
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials
- Department of Chemistry
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Zhenxing Wang
- Wuhan National High Magnetic Field Center & School of Physics
- Huazhong University of Science and Technology
- Wuhan 430074
- China
| | - Jianzhuang Jiang
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials
- Department of Chemistry
- University of Science and Technology Beijing
- Beijing 100083
- China
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13
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Mahapatra P, Koizumi N, Kanetomo T, Ishida T, Ghosh A. A series of CuII–LnIII complexes of an N2O3 donor asymmetric ligand and a possible CuII–TbIII SMM candidate in no bias field. NEW J CHEM 2019. [DOI: 10.1039/c8nj03512a] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Among four isostructural heterometallic CuII–LnIII complexes (Ln = Tb, Dy, Ho or Er) of an N2O3 donor asymmetric ligand, only the CuII–TbIII complex shows SMM behavior at zero bias field but at applied bias field both the CuII–TbIII and CuII–DyIII complexes show SMM behavior.
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Affiliation(s)
- Prithwish Mahapatra
- Department of Chemistry
- University College of Science
- University of Calcutta
- Kolkata 700009
- India
| | - Naoki Koizumi
- Department of Engineering Science
- The University of Electro-Communications
- Tokyo
- Japan
| | - Takuya Kanetomo
- Department of Engineering Science
- The University of Electro-Communications
- Tokyo
- Japan
| | - Takayuki Ishida
- Department of Engineering Science
- The University of Electro-Communications
- Tokyo
- Japan
| | - Ashutosh Ghosh
- Department of Chemistry
- University College of Science
- University of Calcutta
- Kolkata 700009
- India
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14
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Stavretis SE, Cheng Y, Daemen LL, Brown CM, Moseley DH, Bill E, Atanasov M, Ramirez-Cuesta AJ, Neese F, Xue ZL. Probing Magnetic Excitations in CoII
Single-Molecule Magnets by Inelastic Neutron Scattering. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801088] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Shelby E. Stavretis
- Department of Chemistry; University of Tennessee; 37996 Knoxville Tennessee USA
| | - Yongqiang Cheng
- Neutron Scattering Division; Oak Ridge National Laboratory; 37831 Oak Ridge Tennessee USA
| | - Luke L. Daemen
- Neutron Scattering Division; Oak Ridge National Laboratory; 37831 Oak Ridge Tennessee USA
| | - Craig M. Brown
- NIST Center for Neutron Research; National Institute of Standards and Technology; 20899 Gaithersburg Maryland USA
- Department of Chemical and Biomolecular Engineering; University of Delaware; 19716 Newark Delaware USA
| | - Duncan H. Moseley
- Department of Chemistry; University of Tennessee; 37996 Knoxville Tennessee USA
| | - Eckhard Bill
- Max Planck Institute for Chemical Energy Conversion; Stiftstraße 34-36 45470 Mülheim an der Ruhr Germany
| | - Mihail Atanasov
- Max Planck Institute for Coal Research; Kaiser-Wilhelm-Platz 1, D -45470 Mülheim an der Ruhr Germany
- Institute of General and Inorganic Chemistry; Bulgarian Academy of Sciences; 1113 Sofia Bulgaria
| | | | - Frank Neese
- Max Planck Institute for Coal Research; Kaiser-Wilhelm-Platz 1, D -45470 Mülheim an der Ruhr Germany
| | - Zi-Ling Xue
- Department of Chemistry; University of Tennessee; 37996 Knoxville Tennessee USA
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Kachi-Terajima C, Kimura N, Tomori Y, Akahoshi D, Saito T. Solvent-dependent structures of lanthanide–TCNQ coordination networks and their magnetic properties. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1521965] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Chihiro Kachi-Terajima
- Department of Chemistry, Faculty of Science, Toho University, Miyama, Funabashi, Chiba, Japan
- Research Centre for Materials with Integrated Properties, Toho University, Miyama, Funabashi, Chiba, Japan
| | - Norihisa Kimura
- Department of Chemistry, Faculty of Science, Toho University, Miyama, Funabashi, Chiba, Japan
| | - Yuka Tomori
- Department of Chemistry, Faculty of Science, Toho University, Miyama, Funabashi, Chiba, Japan
| | - Daisuke Akahoshi
- Research Centre for Materials with Integrated Properties, Toho University, Miyama, Funabashi, Chiba, Japan
- Department of Physics, Faculty of Science, Toho University, Miyama, Funabashi, Chiba, Japan
| | - Toshiaki Saito
- Research Centre for Materials with Integrated Properties, Toho University, Miyama, Funabashi, Chiba, Japan
- Department of Physics, Faculty of Science, Toho University, Miyama, Funabashi, Chiba, Japan
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Huang G, Daiguebonne C, Calvez G, Suffren Y, Guillou O, Guizouarn T, Le Guennic B, Cador O, Bernot K. Strong Magnetic Coupling and Single-Molecule-Magnet Behavior in Lanthanide-TEMPO Radical Chains. Inorg Chem 2018; 57:11044-11057. [DOI: 10.1021/acs.inorgchem.8b01640] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gang Huang
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) –UMR 6226, F-35000 Rennes, France
| | - Carole Daiguebonne
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) –UMR 6226, F-35000 Rennes, France
| | - Guillaume Calvez
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) –UMR 6226, F-35000 Rennes, France
| | - Yan Suffren
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) –UMR 6226, F-35000 Rennes, France
| | - Olivier Guillou
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) –UMR 6226, F-35000 Rennes, France
| | - Thierry Guizouarn
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) –UMR 6226, F-35000 Rennes, France
| | - Boris Le Guennic
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) –UMR 6226, F-35000 Rennes, France
| | - Olivier Cador
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) –UMR 6226, F-35000 Rennes, France
| | - Kevin Bernot
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) –UMR 6226, F-35000 Rennes, France
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17
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Giansiracusa MJ, Moreno-Pineda E, Hussain R, Marx R, Martínez Prada M, Neugebauer P, Al-Badran S, Collison D, Tuna F, van Slageren J, Carretta S, Guidi T, McInnes EJL, Winpenny REP, Chilton NF. Measurement of Magnetic Exchange in Asymmetric Lanthanide Dimetallics: Toward a Transferable Theoretical Framework. J Am Chem Soc 2018; 140:2504-2513. [DOI: 10.1021/jacs.7b10714] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
| | - Eufemio Moreno-Pineda
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Riaz Hussain
- Dipartimento di Scienze Matematiche, Fisiche ed Informatiche, Università di Parma, Parco Area delle Scienze 7/a, Parma 43124, Italy
| | - Raphael Marx
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - María Martínez Prada
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Petr Neugebauer
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Susan Al-Badran
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - David Collison
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Floriana Tuna
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Joris van Slageren
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Stefano Carretta
- Dipartimento di Scienze Matematiche, Fisiche ed Informatiche, Università di Parma, Parco Area delle Scienze 7/a, Parma 43124, Italy
| | - Tatiana Guidi
- ISIS Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot OX11 0QX, U.K
| | - Eric J. L. McInnes
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | | | - Nicholas F. Chilton
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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18
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Giant coercivity and high magnetic blocking temperatures for N 23- radical-bridged dilanthanide complexes upon ligand dissociation. Nat Commun 2017; 8:2144. [PMID: 29247236 PMCID: PMC5732206 DOI: 10.1038/s41467-017-01553-w] [Citation(s) in RCA: 217] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 09/28/2017] [Indexed: 01/01/2023] Open
Abstract
Increasing the operating temperatures of single-molecule magnets—molecules that can retain magnetic polarization in the absence of an applied field—has potential implications toward information storage and computing, and may also inform the development of new bulk magnets. Progress toward these goals relies upon the development of synthetic chemistry enabling enhancement of the thermal barrier to reversal of the magnetic moment, while suppressing alternative relaxation processes. Herein, we show that pairing the axial magnetic anisotropy enforced by tetramethylcyclopentadienyl (CpMe4H) capping ligands with strong magnetic exchange coupling provided by an N23− radical bridging ligand results in a series of dilanthanide complexes exhibiting exceptionally large magnetic hysteresis loops that persist to high temperatures. Significantly, reducing the coordination number of the metal centers appears to increase axial magnetic anisotropy, giving rise to larger magnetic relaxation barriers and 100-s magnetic blocking temperatures of up to 20 K, as observed for the complex [K(crypt-222)][(CpMe4H2Tb)2(μ−\documentclass[12pt]{minimal}
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\begin{document}$${\rm{N}}_2^ \cdot$$\end{document}N2⋅)]. Single-molecule magnets typically only retain information in the presence of an applied magnetic field and at very low temperatures. Here, Demir, Long and co-workers design N23– radical-bridged dilanthanide complexes that exhibit giant coercivities and 100-s magnetic blocking temperatures of up to 20 K.
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20
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21
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22
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Ortu F, Liu J, Burton M, Fowler JM, Formanuik A, Boulon ME, Chilton NF, Mills DP. Analysis of Lanthanide-Radical Magnetic Interactions in Ce(III) 2,2′-Bipyridyl Complexes. Inorg Chem 2017; 56:2496-2505. [DOI: 10.1021/acs.inorgchem.6b02683] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fabrizio Ortu
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Jingjing Liu
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Matthew Burton
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Jonathan M. Fowler
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Alasdair Formanuik
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | | | - Nicholas F. Chilton
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - David P. Mills
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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23
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Bartolomé E, Arauzo A, Luzón J, Bartolomé J, Bartolomé F. Magnetic Relaxation of Lanthanide-Based Molecular Magnets. HANDBOOK OF MAGNETIC MATERIALS 2017. [DOI: 10.1016/bs.hmm.2017.09.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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24
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Vonci M, Giansiracusa MJ, Van den Heuvel W, Gable RW, Moubaraki B, Murray KS, Yu D, Mole RA, Soncini A, Boskovic C. Magnetic Excitations in Polyoxotungstate-Supported Lanthanoid Single-Molecule Magnets: An Inelastic Neutron Scattering and ab Initio Study. Inorg Chem 2016; 56:378-394. [DOI: 10.1021/acs.inorgchem.6b02312] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Michele Vonci
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, 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
| | - Dehong Yu
- Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - Richard A. Mole
- Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales 2232, Australia
| | - 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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25
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Perspectives on Neutron Scattering in Lanthanide-Based Single-Molecule Magnets and a Case Study of the Tb2(μ-N2) System. MAGNETOCHEMISTRY 2016. [DOI: 10.3390/magnetochemistry2040045] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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26
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Kanetomo T, Yoshitake T, Ishida T. Strongest Ferromagnetic Coupling in Designed Gadolinium(III)–Nitroxide Coordination Compounds. Inorg Chem 2016; 55:8140-6. [DOI: 10.1021/acs.inorgchem.6b01072] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takuya Kanetomo
- Department
of Engineering Science, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
| | - Toru Yoshitake
- Department
of Engineering Science, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
| | - Takayuki Ishida
- Department
of Engineering Science, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
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27
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Frequently used, but still unknown: Terbium(III) tris-hexafluoroacetylacetonate dihydrate. INORG CHEM COMMUN 2016. [DOI: 10.1016/j.inoche.2016.02.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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28
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Ida Y, Ghosh S, Ghosh A, Nojiri H, Ishida T. Strong Ferromagnetic Exchange Interactions in Hinge-like Dy(O2Cu)2 Complexes Involving Double Oxygen Bridges. Inorg Chem 2015; 54:9543-55. [DOI: 10.1021/acs.inorgchem.5b01583] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yumi Ida
- Department of Engineering
Science, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
| | - Soumavo Ghosh
- Department of Chemistry, University College
of Science, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India
| | - Ashutosh Ghosh
- Department of Chemistry, University College
of Science, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India
| | - Hiroyuki Nojiri
- Institute for Materials Research, Tohoku University, Katahira, Sendai 980-8577, Japan
| | - Takayuki Ishida
- Department of Engineering
Science, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
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Kanetomo T, Yoshii S, Nojiri H, Ishida T. Single-molecule magnet involving strong exchange coupling in terbium(iii) complex with 2,2′-bipyridin-6-yl tert-butyl nitroxide. Inorg Chem Front 2015. [DOI: 10.1039/c5qi00098j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Intramolecular antiferromagnetic interaction in Tb-6bpyNO was confirmed by comparison with the magnetic properties of Tb-6bpyCO and Y-6bpyNO. Tb-6bpyNO showed a hysteresis loop below 1.6 K, but Tb-6bpyCO did not behave as a single-molecule magnet.
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Affiliation(s)
- Takuya Kanetomo
- Department of Engineering Science
- The University of Electro-Communications
- Tokyo 182-8585
- Japan
| | - Shunsuke Yoshii
- Institute of Materials Research
- Tohoku University
- Sendai 980-8577
- Japan
| | - Hiroyuki Nojiri
- Institute of Materials Research
- Tohoku University
- Sendai 980-8577
- Japan
| | - Takayuki Ishida
- Department of Engineering Science
- The University of Electro-Communications
- Tokyo 182-8585
- Japan
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