1
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Pointillart F, Le Guennic B, Cador O. Pressure-Induced Structural, Optical and Magnetic Modifications in Lanthanide Single-Molecule Magnets. Chemistry 2024; 30:e202400610. [PMID: 38511968 DOI: 10.1002/chem.202400610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 03/20/2024] [Accepted: 03/21/2024] [Indexed: 03/22/2024]
Abstract
Lanthanide Single-Molecule Magnets are fascinating objects that break magnetic performance records with observable magnetic bistability at the boiling temperature of liquid nitrogen, paving the way for potential applications in high-density data storage. The switching of lanthanide SMM has been successfully achieved using several external stimuli such as redox reaction, pH titration, light irradiation or solvation/desolvation thanks to the high sensitivity of the magnetic anisotropy to any structural change in the lanthanide surrounding. Nevertheless, the use of applied high pressure as an external stimulus is largely underused, especially considering that it can be combined with high pressure X-ray diffraction to establish a complementary structure-property relationship. This Concept article summarizes the few relevant examples of investigations of lanthanide SMMs under applied high pressure, provides conclusions on the effect of such stimulus on molecular structures and magnetic anisotropy, and finally draws perspective on the future development of magnetic measurements under applied pressure.
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Affiliation(s)
- Fabrice Pointillart
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, 35000, Rennes, France
| | - Boris Le Guennic
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, 35000, Rennes, France
| | - Olivier Cador
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, 35000, Rennes, France
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2
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Kapurwan S, Sahu PK, Konar S. Single-Molecule Magnet Behavior of Confined Dy(III) in a Mixed Heteroatom-Substituted Polyoxotungstate. Inorg Chem 2024; 63:4492-4501. [PMID: 38416533 DOI: 10.1021/acs.inorgchem.3c03095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Two heteroatom-templated Dy(III)-confined polyoxotungstates [H2N(CH3)2]7Na7[Dy2(H2O)7(W4O9)(HPSeW15O54)(α-SeW9O33)2]·31H2O (1) and [H2N(CH3)2]14K2Na18{[Dy2(H2O)13W14O40]2[α-SeW9O33]4[HPSeW15O54]2}·44H2O (2) were synthesized by a one-pot aqueous reaction and structurally characterized. The most distinctive structural feature of complexes 1 & 2 is the simultaneous presence of both trivacant Keggin [α-SeW9O33]8- and Dawson [HPSeW15O54]10- building blocks containing P(III)-Se(IV) heteroatoms. The trimeric polyanion of 1 can be represented as a fusion of two trivacant Keggin [α-SeW9O33]8- and Dawson [HPSeW15O54]10- building units encapsulating the [Dy2(H2O)7(W4O9)]12+ cluster. On the other hand, hexameric polyoxoanions of 2 are described as four trivacant Keggin [α-SeW9O33]8- and two Dawson [HPSeW15O54]10-, building units anchoring a [Dy4(H2O)26W28O80]20+ cluster. The magnetic investigation revealed the presence of significant magnetic anisotropy and slow relaxation of magnetization behavior for complex 1 with a phenomenological energy barrier, Ueff = 13.58 K in the absence of an external magnetic field, and Ueff = 24.57 K in the presence of a 500 Oe external dc magnetic field. On the other hand, complex 2 favors the QTM relaxation process in the absence of an external magnetic field and shows field-induced slow relaxation of magnetization with Ueff = 11.11 K at 1500 Oe applied dc field. The in-depth analysis of magnetic relaxation dynamics shows that the relaxation process follows the Orbach as well as Raman relaxation pathways. Further, the ab initio calculation of the studied complexes confirms that the highly axial ground and first excited energy states (containing pure highest mJ states) are responsible for the observed single-molecule magnet (SMM) behavior. Remarkably, this is the first example of a mixed heteroatom-based Dy(III)-substituted polyoxotungstate with both trimeric Keggin [α-SeW9O33]8- and Dawson [HPSeW15O54]10- building units showing SMM behavior.
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Affiliation(s)
- Sandhya Kapurwan
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India
| | - Pradip Kumar Sahu
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India
| | - Sanjit Konar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India
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3
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Mattioni A, Staab JK, Blackmore WJA, Reta D, Iles-Smith J, Nazir A, Chilton NF. Vibronic effects on the quantum tunnelling of magnetisation in Kramers single-molecule magnets. Nat Commun 2024; 15:485. [PMID: 38212305 PMCID: PMC10784566 DOI: 10.1038/s41467-023-44486-3] [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: 01/13/2023] [Accepted: 12/13/2023] [Indexed: 01/13/2024] Open
Abstract
Single-molecule magnets are among the most promising platforms for achieving molecular-scale data storage and processing. Their magnetisation dynamics are determined by the interplay between electronic and vibrational degrees of freedom, which can couple coherently, leading to complex vibronic dynamics. Building on an ab initio description of the electronic and vibrational Hamiltonians, we formulate a non-perturbative vibronic model of the low-energy magnetic degrees of freedom in monometallic single-molecule magnets. Describing their low-temperature magnetism in terms of magnetic polarons, we are able to quantify the vibronic contribution to the quantum tunnelling of the magnetisation, a process that is commonly assumed to be independent of spin-phonon coupling. We find that the formation of magnetic polarons lowers the tunnelling probability in both amorphous and crystalline systems by stabilising the low-lying spin states. This work, thus, shows that spin-phonon coupling subtly influences magnetic relaxation in single-molecule magnets even at extremely low temperatures where no vibrational excitations are present.
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Affiliation(s)
- Andrea Mattioni
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
| | - Jakob K Staab
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - William J A Blackmore
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Daniel Reta
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
- Faculty of Chemistry, The University of the Basque Country UPV/EHU, Donostia, 20018, Spain
- Donostia International Physics Center (DIPC), Donostia, 20018, Spain
- IKERBASQUE, Basque Foundation for Science, Bilbao, 48013, Spain
| | - Jake Iles-Smith
- Department of Physics and Astronomy, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Ahsan Nazir
- Department of Physics and Astronomy, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Nicholas F Chilton
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
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4
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Pointillart F, Bernot K, Le Guennic B, Cador O. Isotopic enrichment in lanthanide coordination complexes: contribution to single-molecule magnets and spin qudit insights. Chem Commun (Camb) 2023. [PMID: 37335142 DOI: 10.1039/d3cc01722b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Lanthanide Single-Molecule Magnets (SMMs) fascinate the scientific community due to their plethora of potential applications ranging from data storage to spintronic devices and quantum computing. This review article proposes a comprehensive description of the influence of the nuclear spin, i.e. hyperfine interaction, on the magnetic properties of lanthanide SMMs and on quantum information processing of qudit. This influence is analysed for non-Kramers and Kramers lanthanide SMMs as well as for the electronic distribution of the electron in 4f orbitals i.e. oblate and prolate ions. Then the role of magnetic interactions in isotopically enriched polynuclear Dy(III) SMMs is discussed. Finally the possible effect of superhyperfine interaction due to the nuclear spin of elements originating from the surrounding of the lanthanide centre is analyzed. The effect of nuclear spin on the dynamics of the lanthanide SMMs is demonstrated using different techniques such as magnetometry, muon spectroscopy (μ-SR), and Mössbauer and Resonance Vibrational Spectroscopies.
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Affiliation(s)
- Fabrice Pointillart
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR6226, 35000 Rennes, France.
| | - Kevin Bernot
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR6226, 35000 Rennes, France.
| | - Boris Le Guennic
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR6226, 35000 Rennes, France.
| | - Olivier Cador
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR6226, 35000 Rennes, France.
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5
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Bhanja A, Roy Chaudhuri S, Canaj AB, Vyas SP, Ortu F, Smythe L, Murrie M, Goswami R, Ray D. Synthesis and characterization of two self-assembled [Cu 6Gd 3] and [Cu 5Dy 2] complexes exhibiting the magnetocaloric effect, slow relaxation of magnetization, and anticancer activity. Dalton Trans 2023; 52:3795-3806. [PMID: 36866587 DOI: 10.1039/d2dt03932j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Two new paths for coordination driven self-assembly reactions under the binding support of 2-((1-hydroxy-2-methylpropan-2-ylimino)methyl)-6-methoxyphenol (H2L) have been discovered from the reactions of Cu(ClO4)2·6H2O, NEt3 and GdCl3/DyCl3·6H2O in MeOH/CHCl3 (2 : 1) medium. A similar synthetic protocol is useful to provide two different types of self-aggregated molecular clusters [Cu6Gd3(L)3(HL)3(μ3-Cl)3(μ3-OH)6(OH)2]ClO4·4H2O (1) and [Cu5Dy2(L)2(HL)2(μ-Cl)2(μ3-OH)4(ClO4)2(H2O)6](ClO4)2·2NHEt3Cl·21H2O (2). The adopted reaction procedure established the importance of the HO- and Cl- ions in the mineral-like growth of the complexes, derived from solvents and metal ion salts. In the case of complex 1, one GdIII center has been trapped at the central position of the core upheld by six μ3-OH and three μ3-Cl groups, whereas for complex 2 one CuII center was trapped using four μ3-hydroxo and two μ-chlorido groups. The magnetothermal behavior of 1 has been examined for a magnetocaloric effect of -ΔSm = 11.3 J kg-1 K-1 at 2 K for ΔH = 7 T, whereas the magnetic susceptibility measurements of 2 showed slow magnetic relaxation with Ueff = 15.8 K and τ0 = 9.8 × 10-7 s in zero external dc field. Cancer cell growth inhibition studies proved the potential of both the complexes with interestingly high activity for the Cu6Gd3 complex against human lung cancer cells. Both complexes 1 and 2 also exhibited DNA and human serum albumin (HSA) binding abilities in relation to the involved binding sites and thermodynamics.
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Affiliation(s)
- Avik Bhanja
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India.
- Department of Chemistry, Indian Institute of Technology Bombay, Powai 400076, India
| | | | - Angelos B Canaj
- School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| | - Shachi Pranjal Vyas
- School of Bioscience, Indian Institute of Technology, Kharagpur 721302, India
| | - Fabrizio Ortu
- School of Chemistry, University of Leicester, LE1 7RH Leicester, UK
| | - Lucy Smythe
- School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| | - Mark Murrie
- School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| | - Ritobrata Goswami
- School of Bioscience, Indian Institute of Technology, Kharagpur 721302, India
| | - Debashis Ray
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India.
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6
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Kalita P, Ahmed N, Moorthy S, Béreau V, Bar AK, Kumar P, Nayak P, Sutter JP, Singh SK, Chandrasekhar V. Slow magnetic relaxation in a homoaxially phosphine oxide coordinated pentagonal bipyramidal Dy(III) complex. Dalton Trans 2023; 52:2804-2815. [PMID: 36752179 DOI: 10.1039/d2dt03789k] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We report the synthesis of [(L)DyIII(Cy3PO)2]·[BPh4] (1-Dy) (where H2L = 2,6-diacetylpyridine bis-benzoylhydrazone and Cy = cyclohexyl) which crystallized in the triclinic, P1̄ space group. The local geometry around Dy(III) in 1-Dy was found to be pentagonal bipyramidal (pseudo-D5h). The AC magnetic susceptibility measurements performed on 1-Dy and on its diluted 1-Y(Dy) samples showed a typical single-molecule magnet signature revealed by the appearance of AC-frequency dependent out-of-phase susceptibility signals in the absence of a static magnetic field. The out-of-phase AC susceptibility signals were well resolved on the application of a small magnetic field (HDC = 500 Oe) and yielded an energy barrier for magnetization flipping of Ueff/kB = 50 K for the diluted derivative. The magnetic studies on 1-Dy and 1-Y(Dy) and data analysis further confirm that Raman and QTM under-barrier magnetic relaxations play a crucial role in lowering Ueff despite the almost axial nature of the Dy(III) ion in 1-Dy. We have rationalized these observations through detailed ab initio calculations performed on the X-ray crystal structure of 1-Dy.
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Affiliation(s)
- Pankaj Kalita
- Tata Institute of Fundamental Research, 36/P, Gopanpally Village, Serilingampally Mandal, Ranga Reddy District, Hyderabad 500046, India.
| | - Naushad Ahmed
- Tata Institute of Fundamental Research, 36/P, Gopanpally Village, Serilingampally Mandal, Ranga Reddy District, Hyderabad 500046, India.
| | - Shruti Moorthy
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, 502284, Telangana, India.
| | - Virginie Béreau
- Laboratoire de Chimie de Coordination du CNRS, Université de Toulouse, CNRS, Toulouse, France. .,Université de Toulouse, Institut Universitaire de Technologie Paul Sabatier-Département de Chimie, Av. Georges Pompidou, F-81104 Castres, France
| | - Arun Kumar Bar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, Andhra Pradesh 501507, India
| | - Pawan Kumar
- Department of Chemistry, IIT Kanpur, Kanpur 208016, India
| | - Prakash Nayak
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar 752050, India
| | - Jean-Pascal Sutter
- Laboratoire de Chimie de Coordination du CNRS, Université de Toulouse, CNRS, Toulouse, France.
| | - Saurabh Kumar Singh
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, 502284, Telangana, India.
| | - Vadapalli Chandrasekhar
- Tata Institute of Fundamental Research, 36/P, Gopanpally Village, Serilingampally Mandal, Ranga Reddy District, Hyderabad 500046, India. .,Department of Chemistry, IIT Kanpur, Kanpur 208016, India
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7
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Chiboub Fellah FZ, Pointillart F, Guizouarn T, Roisnel T, Dege N, Chiboub Fellah A, Hassaine R. Photophysical Properties and Single‐Molecule Magnet Behavior in Heterobimetallic 3d4 f Schiff Base Complexes. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Fabrice Pointillart
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 35000 Rennes France
| | - Thierry Guizouarn
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 35000 Rennes France
| | - Thierry Roisnel
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226 35000 Rennes France
| | - Necmi Dege
- Ondokuz Mayis University Faculty of Arts and Sciences Department of Physics 55200 Atakum Samsun Turkey
| | - Abdelghani Chiboub Fellah
- Laboratoire de Valorisation des Ressources en Eau Équipe de chimie de coordination Université de Tlemcen, BP 119 13000 Tlemcen Algeria
| | - Ridha Hassaine
- Laboratoire de Catalyse et Synthèse en Chimie Organique Université de Tlemcen, BP 119 13000 Tlemcen Algeria
- Centre de Recherche Scientifique et Technique en Analyses Physico – ChimiquesCRAPC, Bou-Ismail BP 384 42004 Tipaza Algeria
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8
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Lu YB, Wu JW, Zhu SD, Wang SQ, Zhang SY, Liu CM, Li R, Li J, Ai JH, Xie YR. 3-Pyridylacetic-Based Lanthanide Complexes Exhibiting Magnetic Entropy Changes, Single-Molecule Magnet, and Fluorescence. ACS OMEGA 2022; 7:2604-2612. [PMID: 35097258 PMCID: PMC8793079 DOI: 10.1021/acsomega.1c04728] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 11/30/2021] [Indexed: 06/14/2023]
Abstract
Four complexes from lanthanides, 3-pyridylacetate, and 1,10-phenanthroline, formulated as [Ln2(3-PAA)2(μ-Cl)2(phen)4](ClO4)2 [Ln = Gd(1), Dy(2), Eu(3), Tb(4), 3-PAA = 3-pyridylacetic acid, phen = 1,10-phenanthroline], were obtained. The four compounds were characterized by IR spectra, thermogravimetric analyses, powder X-ray diffraction, and single-crystal X-ray diffraction. Compounds 1-4 are isomorphous, and they have a dinuclear structure. Magnetic studies reveal that 1 shows the magnetocaloric effect with -ΔS m max = 19.03 J kg-1 K-1 at 2 K for ΔH = 5 T, and 2 displays a field-induced single-molecule magnet with U eff = 19.02 K. The photoluminescent spectra of 3 and 4 exhibit strong characteristic emission, which demonstrate that the ligand-to-EuIII/TbIII energy transfer is efficient.
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Affiliation(s)
- Ying-Bing Lu
- College
of Chemistry and Chemical Engineering, Gannan
Normal University, Ganzhou 341000, P. R. China
- National-Local
Joint Engineering Research Center of Heavy Metals Pollutants Control
and Resource Utilization, Nanchang Hangkong
University, Nanchang 330000, P. R. China
| | - Jun-Wei Wu
- College
of Chemistry and Chemical Engineering, Gannan
Normal University, Ganzhou 341000, P. R. China
| | - Shui-Dong Zhu
- College
of Chemistry and Chemical Engineering, Gannan
Normal University, Ganzhou 341000, P. R. China
| | - Sheng-Qian Wang
- College
of Chemistry and Chemical Engineering, Gannan
Normal University, Ganzhou 341000, P. R. China
| | - Shi-Yong Zhang
- College
of Chemistry and Chemical Engineering, Gannan
Normal University, Ganzhou 341000, P. R. China
| | - Cai-Ming Liu
- Beijing
National Laboratory for Molecular Sciences, CAS Key Laboratory of
Organic Solids, Institute of Chemistry,
Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Rong Li
- School
of Materials Science & Engineering, Hubei University, Wuhan 430062, P. R. China
| | - Juan Li
- College
of Chemistry and Chemical Engineering, Gannan
Normal University, Ganzhou 341000, P. R. China
| | - Jia-Hao Ai
- College
of Chemistry and Chemical Engineering, Gannan
Normal University, Ganzhou 341000, P. R. China
| | - Yong-Rong Xie
- College
of Chemistry and Chemical Engineering, Gannan
Normal University, Ganzhou 341000, P. R. China
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9
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Roy S, Shukla P, Prakash Sahu P, Sun Y, Ahmed N, Chandra Sahoo S, Wang X, Kumar Singh S, Das S. Zero‐field Slow Magnetic Relaxation Behavior of Dy
2
in a Series of Dinuclear {Ln
2
} (Ln=Dy, Tb, Gd and Er) Complexes: A Combined Experimental and Theoretical Study. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202100983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Soumalya Roy
- Department of Basic Sciences, Chemistry Discipline Institute of Infrastructure Technology Research And Management Near Khokhra Circle, Maninagar East Ahmedabad 380026, Gujarat India
| | - Pooja Shukla
- Department of Basic Sciences, Chemistry Discipline Institute of Infrastructure Technology Research And Management Near Khokhra Circle, Maninagar East Ahmedabad 380026, Gujarat India
| | - Prem Prakash Sahu
- Department of Chemistry Indian Institute of Technology Hyderabad Kandi- 502285, Sangareddy Telangana India
| | - Yu‐Chen Sun
- State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Naushad Ahmed
- Department of Chemistry Indian Institute of Technology Hyderabad Kandi- 502285, Sangareddy Telangana India
| | | | - Xin‐Yi Wang
- State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Saurabh Kumar Singh
- Department of Chemistry Indian Institute of Technology Hyderabad Kandi- 502285, Sangareddy Telangana 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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10
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Chen YC, Tong ML. Single-Molecule Magnets beyond a Single Lanthanide Ion: The Art of Coupling. Chem Sci 2022; 13:8716-8726. [PMID: 35975153 PMCID: PMC9350631 DOI: 10.1039/d2sc01532c] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 06/23/2022] [Indexed: 11/22/2022] Open
Abstract
The promising future of storing and processing quantized information at the molecular level has been attracting the study of Single-Molecule Magnets (SMMs) for almost three decades. Although some recent breakthroughs are mainly about the SMMs containing only one lanthanide ion, we believe SMMs can tell a much deeper story than the single-ion anisotropy. Here in this Perspective, we will try to draw a unified picture of SMMs as a delicately coupled spin system between multiple spin centres. The hierarchical couplings will be presented step-by-step, from the intra-atomic hyperfine coupling, to the direct and indirect intra-molecular couplings with neighbouring spin centres, and all the way to the inter-molecular and spin–phonon couplings. Along with the discussions on their distinctive impacts on the energy level structures and thus magnetic behaviours, a promising big picture for further studies is proposed, encouraging the multifaceted developments of molecular magnetism and beyond. In this Perspective, we draw a unified picture for single-molecule magnets as delicately coupled spin systems, discuss the hierarchical couplings (from intra-atomic to inter-molecular) and their distinctive impacts on the magnetic behaviours.![]()
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Affiliation(s)
- Yan-Cong Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University Guangzhou 510006 P. R. China
| | - Ming-Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University Guangzhou 510006 P. R. China
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11
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Liu Y, Ho LTA, Huang GZ, Chen YC, Ungur L, Liu JL, Tong ML. Magnetization Dynamics on Isotope-Isomorphic Holmium Single-Molecule Magnets. Angew Chem Int Ed Engl 2021; 60:27282-27287. [PMID: 34668633 DOI: 10.1002/anie.202112764] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 10/16/2021] [Indexed: 11/08/2022]
Abstract
Here we reported the deuteration of the metal-binding equatorial water molecules in a reported HoIII single-molecule magnet (SMM) with pentagonal-bipyramidal geometry, from [Ho(CyPh2 PO)2 (H2 O)5 ]3+ to [Ho(CyPh2 PO)2 (D2 O)5 ]3+ . The hyperfine structures originating from the nuclear spin of 165 HoIII can be clearly observed. Moreover, the resulting magnetization dynamics revealed the switch of the relative relaxation rates for the two isotope-isomorphic complexes-respectively faster/slower at low/high temperature. The noticeable isotope effect arises from not only the paramagnetic metal center but also the diamagnetic ligands, which can be explained by the ab initio calculated tunnel splitting and the involvement of the super-hyperfine interaction related to the difference in the nuclear spin number of protium (1 H, I=1 /2 ) and deuterium (2 H, I=1).
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Affiliation(s)
- Yang Liu
- Key Lab of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Le Tuan Anh Ho
- Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore
| | - Guo-Zhang Huang
- Key Lab of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Yan-Cong Chen
- Key Lab of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Liviu Ungur
- Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore
| | - Jun-Liang Liu
- Key Lab of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Ming-Liang Tong
- Key Lab of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
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12
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Liu Y, Ho LTA, Huang G, Chen Y, Ungur L, Liu J, Tong M. Magnetization Dynamics on Isotope‐Isomorphic Holmium Single‐Molecule Magnets. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202112764] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yang Liu
- Key Lab of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510006 P. R. China
| | - Le Tuan Anh Ho
- Department of Chemistry National University of Singapore Singapore 117543 Singapore
| | - Guo‐Zhang Huang
- Key Lab of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510006 P. R. China
| | - Yan‐Cong Chen
- Key Lab of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510006 P. R. China
| | - Liviu Ungur
- Department of Chemistry National University of Singapore Singapore 117543 Singapore
| | - Jun‐Liang Liu
- Key Lab of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510006 P. R. China
| | - Ming‐Liang Tong
- Key Lab of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510006 P. R. China
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13
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Flores González J, Lefeuvre B, Degraeve B, Cador O, Pointillart F. Study of the influence of nuclear spin and dilution over the slow relaxation in a 3d4f heterobimetallic single-molecule magnet. Dalton Trans 2021; 50:11466-11471. [PMID: 34346449 DOI: 10.1039/d1dt01608c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effects of isotopic enrichment and magnetic dilution have been investigated in a heterobimetallic complex of formula [Zn2L2ADyCl3]·2H2O (ADyZn2) (A = 162 and 163) presenting slow relaxation of the magnetization. Isotopic substitution for 162Dy (I = 0) and 163Dy (I = 5/2) leads to a shift in the relaxation times depending on the suppression or enhancement of the hyperfine interactions. The release of the dipolar interactions through magnetic dilution in a Y(iii)-based matrix enhances the slow relaxation of the magnetization and the visibility of the nuclear spin effect. A comparison of the hysteresis loop at 0.5 K for bulk and diluted analogues of pure isotopically enriched complexes suggested a role of the nuclear spin in the interaction between the active system and the matrix.
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Affiliation(s)
- Jessica Flores González
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France.
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14
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Bellucci L, Labella L, Marchetti F, Pineider F, Poneti G, Samaritani S. Magnetic relaxation in dysprosium and terbium 1D-zigzag coordination chains having only 4,4′-bipyridine as connector. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120165] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Bernot K, Daiguebonne C, Calvez G, Suffren Y, Guillou O. A Journey in Lanthanide Coordination Chemistry: From Evaporable Dimers to Magnetic Materials and Luminescent Devices. Acc Chem Res 2021; 54:427-440. [PMID: 33395256 DOI: 10.1021/acs.accounts.0c00684] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
ConspectusLanthanide ions are prime ingredients for the design of compounds, materials, and devices with unique magnetic and optical properties. Accordingly, coordination chemistry is one of the best tools for building molecular edifices from these ions because it allows careful control of the ions' environment and of the dimensionality of the final compound.In this Account, we review our results on lanthanide-based dimers. We show how a pure fundamental study on lanthanide coordination chemistry allows the investigation of a full continuum of results from the compound to materials and then to devices. The conversion of molecules into materials is a tricky task because it requires strong molecular robustness toward the surface deposition processes as well as the preservation and detectability of the molecular properties in the material. Additionally, the passage of a material toward a device implies a material with a given function, for example, a tailored response to an external stimulus.To do so, we targeted neutral and isolated molecules whose transfer on surfaces by chemi- or physisorption is much easier than that of charged molecules or extended coordination networks. Then, we focused on molecules with very strong evaporability to avoid wet chemistry deposition processes that are more likely to damage the molecules and/or distort their geometries.We thus designed lanthanide dimers based on fluorinated β-diketonates and pyridine-N-oxide ligands. As expected, they show remarkable evaporability but also strong luminescence and interesting magnetic behavior because they behave as single-molecule magnets (SMMs). Ligand substitutions and stoichiometric modifications allow the optimization of the geometric organization of the dimers in the crystal packing as well as their evaporability, SMM behavior, luminescent properties, or their ability to be anchored on surfaces. Most of all, this family of molecules shows a strong ability to form thick films on various substrates. This allows converting these molecules to magnetic materials and luminescent devices.Magnetic materials can be designed by creating thick films of the dimers deposited on gold. These films have been designed and investigated with the most advanced techniques of on-surface imaging (atomic force microscopy, AFM), on-surface physicochemical characterization (X-ray photoelectron spectroscopy (XPS), time of flight-secondary ion mass spectroscopy (Tof-SIMS)), and on-surface magnetic investigation (low-energy muon spin relaxation (LE-μSR)). Contrary to what was previously observed on other SMM films, no depth dependence of the SMM behavior was observed. This means that the dimers do not suffer from the vacuum or substrate interface and behave similarly, whatever their localization. This exceptional magnetic robustness is a key ingredient in the creation of materials for molecular magnetic data storage.Luminescent devices can be obtained by layering molecular films of the dimers with a copper-rich solid-state electrolyte between ITO/Pt electrodes. The electromigration of Cu2+ ions into films of Eu3+, Tb3+, and Dy3+ dimers quenches their luminescence. This luminescence tuning by electromigration is reversible, and this setup can be considered to be a proof of concept of full solid-state luminescent device where reversible coding can be tailored by an electric field. It is envisioned for optical data storage purposes. In the future, it could also benefit from the SMM properties of the molecules to pave the way toward multifunctional molecular data storage devices.
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Affiliation(s)
- Kevin Bernot
- Université Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000 Rennes, France
| | - Carole Daiguebonne
- Université Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000 Rennes, France
| | - Guillaume Calvez
- Université Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000 Rennes, France
| | - Yan Suffren
- Université Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000 Rennes, France
| | - Olivier Guillou
- Université Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000 Rennes, France
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16
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Flores Gonzalez J, Douib H, Le Guennic B, Pointillart F, Cador O. Ytterbium-Centered Isotopic Enrichment Leading to a Zero-Field Single-Molecule Magnet. Inorg Chem 2021; 60:540-544. [PMID: 33416321 DOI: 10.1021/acs.inorgchem.0c02652] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
An unprecedented combination of isotopic enrichment and magnetic dilution approaches for a prolate ytterbium(III)-based complex was performed. It results in the appearance of the first observations of a nuclear spin effect on both quantum tunneling of magnetization and slow magnetic relaxation for an ytterbium complex under a zero applied field.
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Affiliation(s)
- Jessica Flores Gonzalez
- Institut des Sciences Chimiques de Rennes, Université Rennes, CNRS, UMR 6226, Rennes 35000, France
| | - Haiet Douib
- Institut des Sciences Chimiques de Rennes, Université Rennes, CNRS, UMR 6226, Rennes 35000, France
| | - Boris Le Guennic
- Institut des Sciences Chimiques de Rennes, Université Rennes, CNRS, UMR 6226, Rennes 35000, France
| | - Fabrice Pointillart
- Institut des Sciences Chimiques de Rennes, Université Rennes, CNRS, UMR 6226, Rennes 35000, France
| | - Olivier Cador
- Institut des Sciences Chimiques de Rennes, Université Rennes, CNRS, UMR 6226, Rennes 35000, France
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17
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A Local
D
4h
Symmetric Dysprosium(III) Single‐Molecule Magnet with an Energy Barrier Exceeding 2000 K**. Chemistry 2021; 27:2623-2627. [DOI: 10.1002/chem.202003931] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/23/2020] [Indexed: 11/07/2022]
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18
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Kong M, Feng X, Wang J, Zhang YQ, Song Y. Tuning magnetic anisotropy via terminal ligands along the Dy⋯Dy orientation in novel centrosymmetric [Dy2] single molecule magnets. Dalton Trans 2021; 50:568-577. [DOI: 10.1039/d0dt03854g] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The SMM properties of four dinuclear DyIII complexes can be effectively tuned by the appropriate alteration of terminal ligands and lattice guests.
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Affiliation(s)
- Ming Kong
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- People's Republic of China
| | - Xin Feng
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- People's Republic of China
| | - Jia Wang
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- People's Republic of China
| | - Yi-Quan Zhang
- Jiangsu Key Lab For NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- People's Republic of China
| | - You Song
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- People's Republic of China
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19
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Goodwin CAP. Blocking like it's hot: a synthetic chemists' path to high-temperature lanthanide single molecule magnets. Dalton Trans 2020; 49:14320-14337. [PMID: 33030172 DOI: 10.1039/d0dt01904f] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Progress in the synthesis, design, and characterisation of single-molecule magnets (SMMs) has expanded dramatically from curiosity driven beginnings to molecules that retain magnetization above the boiling point of liquid nitrogen. This is in no small part due to the increasingly collaborative nature of this research where synthetic targets are guided by theoretical design criteria. This article aims to summarize these efforts and progress from the perspective of a synthetic chemist with a focus on how chemistry can modulate physical properties. A simple overview is presented of lanthanide electronic structure in order to contextualize the synthetic advances that have led to drastic improvements in the performance of lanthanide-based SMMs from the early 2000s to the late 2010s.
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20
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Acharya J, Ahmed N, Flores Gonzalez J, Kumar P, Cador O, Singh SK, Pointillart F, Chandrasekhar V. Slow magnetic relaxation in a homo dinuclear Dy(iii) complex in a pentagonal bipyramidal geometry. Dalton Trans 2020; 49:13110-13122. [PMID: 32930277 DOI: 10.1039/d0dt02881a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We hereby report a dinuclear Dy(iii) complex, [Dy(LH3)Cl2]2·2Et2O (1) (LH4 = 2,3-dihydroxybenzylidene)-2-(hydroxyimino)propanehydrazide where both the metal centres are in a pentagonal bipyramidal (PBP) geometry with the axial positions being occupied by negatively charged Cl- ions. The complex as well as it's 10% diluted analogue (110) do not show zero-field SMM behaviour. However, in the presence of small optimum dc fields the slow relaxation of magnetization was displayed. The effective energy barrier for 110 at 800 Oe of applied field was extracted as 83(17) K with τ0 = 2(4) × 10-12 s. Through a combined experimental and ab initio electronic structure calculations studies we have thoroughly analysed the role of the ligand field around the Dy(iii), present in pentagonal bipyramidal geometry, in contributing to the slow relaxation of magnetization.
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Affiliation(s)
- Joydev Acharya
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India.
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21
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Izuogu DC, Yoshida T, Cosquer G, Asegbeloyin JN, Zhang H, Thom AJW, Yamashita M. Periodicity of Single‐Molecule Magnet Behaviour of Heterotetranuclear Lanthanide Complexes across the Lanthanide Series: A Compendium. Chemistry 2020; 26:6036-6049. [DOI: 10.1002/chem.202000161] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 02/04/2020] [Indexed: 11/06/2022]
Affiliation(s)
- David Chukwuma Izuogu
- Department of ChemistryUniversity of Cambridge Lensfield Road Cambridge CB2 1EW UK
- Department of ChemistryGraduate School of ScienceTohoku University 6-3 Aza-Aoba, Aramaki Sendai 980-8578 Japan
- Department of Pure and Industrial ChemistryUniversity of Nigeria, Nsukka 410001 Enugu State Nigeria
| | - Takefumi Yoshida
- Department of ChemistryGraduate School of ScienceTohoku University 6-3 Aza-Aoba, Aramaki Sendai 980-8578 Japan
- WPI-Advanced Institute for Materials Research (AIMR)Tohoku University 2-1-1 Katahira Sendai 980-8577 Japan
| | - Goulven Cosquer
- Department of ChemistryGraduate School of ScienceHiroshima University 1-3-1 Kagamiyama Higashihiroshima 739-8526 Japan
| | - Jonnie N. Asegbeloyin
- Department of Pure and Industrial ChemistryUniversity of Nigeria, Nsukka 410001 Enugu State Nigeria
| | - Haitao Zhang
- Department of ChemistryGraduate School of ScienceTohoku University 6-3 Aza-Aoba, Aramaki Sendai 980-8578 Japan
| | - Alex J. W. Thom
- Department of ChemistryUniversity of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Masahiro Yamashita
- Department of ChemistryGraduate School of ScienceTohoku University 6-3 Aza-Aoba, Aramaki Sendai 980-8578 Japan
- WPI-Advanced Institute for Materials Research (AIMR)Tohoku University 2-1-1 Katahira Sendai 980-8577 Japan
- School of Materials Science and EngineeringNankai University Tianjin 300350 P.R. China
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22
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Guettas D, Gendron F, Fernandez Garcia G, Riobé F, Roisnel T, Maury O, Pilet G, Cador O, Le Guennic B. Luminescence‐Driven Electronic Structure Determination in a Textbook Dimeric Dy
III
‐Based Single‐Molecule Magnet. Chemistry 2020; 26:4389-4395. [DOI: 10.1002/chem.201905493] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Djamila Guettas
- Laboratoire des Multimatériaux et Interfaces (LMI) UMR 5615 CNRS, Université Claude Bernard Lyon 1, bâtiment Chevreul Avenue du 11 novembre 1918 69622 Villeurbanne cedex France
| | - Frédéric Gendron
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)—UMR 6226 Univ Rennes 1 35000 Rennes France
| | - Guglielmo Fernandez Garcia
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)—UMR 6226 Univ Rennes 1 35000 Rennes France
- Dipartimento di Chimica “U.Schiff” and UdR INSTM Università degli Studi di Firenze Via della Lastruccia 3–13 50019 Sesto Fiorentino Italy
| | - François Riobé
- Univ Lyon Ens de Lyon, CNRS UMR 5182 Université Claude Bernard Lyon 1 Laboratoire de Chimie F69342 Lyon France
| | - Thierry Roisnel
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)—UMR 6226 Univ Rennes 1 35000 Rennes France
| | - Olivier Maury
- Univ Lyon Ens de Lyon, CNRS UMR 5182 Université Claude Bernard Lyon 1 Laboratoire de Chimie F69342 Lyon France
| | - Guillaume Pilet
- Laboratoire des Multimatériaux et Interfaces (LMI) UMR 5615 CNRS, Université Claude Bernard Lyon 1, bâtiment Chevreul Avenue du 11 novembre 1918 69622 Villeurbanne cedex France
| | - Olivier Cador
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)—UMR 6226 Univ Rennes 1 35000 Rennes France
| | - Boris Le Guennic
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)—UMR 6226 Univ Rennes 1 35000 Rennes France
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23
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Pointillart F, Flores Gonzalez J, Montigaud V, Tesi L, Cherkasov V, Le Guennic B, Cador O, Ouahab L, Sessoli R, Kuropatov V. Redox- and solvato-magnetic switching in a tetrathiafulvalene-based triad single-molecule magnet. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00319k] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Simultaneous redox and solvato-magnetic switching was achieved for a dinuclear dysprosium single-molecule magnet involving an extended tetrathiafulvalene fused semiquinone based triad.
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Affiliation(s)
- Fabrice Pointillart
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226
- F-35000 Rennes
- France
| | - Jessica Flores Gonzalez
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226
- F-35000 Rennes
- France
| | - Vincent Montigaud
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226
- F-35000 Rennes
- France
| | - Lorenzo Tesi
- Dipartimento di Chimica “Ugo Schiff” & INSTM RU
- Università degli Studi di Firenze
- I50019 Sesto Fiorentino (Firenze)
- Italy
- Institute of Physical Chemistry
| | - Vladimir Cherkasov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russia
| | - Boris Le Guennic
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226
- F-35000 Rennes
- France
| | - Olivier Cador
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226
- F-35000 Rennes
- France
| | - Lahcène Ouahab
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226
- F-35000 Rennes
- France
| | - Roberta Sessoli
- Dipartimento di Chimica “Ugo Schiff” & INSTM RU
- Università degli Studi di Firenze
- I50019 Sesto Fiorentino (Firenze)
- Italy
| | - Viacheslav Kuropatov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russia
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24
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Kong M, Feng X, Li J, Hu ZB, Wang J, Song XJ, Jing ZY, Zhang YQ, Song Y. Structurally modulated single-ion magnets of mononuclear β-diketone dysprosium(iii) complexes. Dalton Trans 2020; 49:14931-14940. [PMID: 33078800 DOI: 10.1039/d0dt02864a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four perturbed eight-coordinated mononuclear β-diketone based Dy(iii) SIMs with distinct hydrogen bond interactions and electron delocalization are noteworthily modulated by the aromatic groups of auxiliary ligands.
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Affiliation(s)
- Ming Kong
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructure
- Nanjing University
- Nanjing 210023
| | - Xin Feng
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructure
- Nanjing University
- Nanjing 210023
| | - Jing Li
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructure
- Nanjing University
- Nanjing 210023
| | - Zhao-Bo Hu
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructure
- Nanjing University
- Nanjing 210023
| | - Jia Wang
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructure
- Nanjing University
- Nanjing 210023
| | - Xiao-Jiao Song
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructure
- Nanjing University
- Nanjing 210023
| | - Zhao-Yang Jing
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructure
- Nanjing University
- Nanjing 210023
| | - Yi-Quan Zhang
- Jiangsu Key Lab For NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- People's Republic of China
| | - You Song
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructure
- Nanjing University
- Nanjing 210023
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25
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Cador O, Le Guennic B, Ouahab L, Pointillart F. Decorated Tetrathiafulvalene-Based Ligands: Powerful Chemical Tools for the Design of Single-Molecule Magnets. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900981] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Olivier Cador
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; Univ Rennes, CNRS; F-35000 Rennes France
| | - Boris Le Guennic
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; Univ Rennes, CNRS; F-35000 Rennes France
| | - Lahcène Ouahab
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; Univ Rennes, CNRS; F-35000 Rennes France
| | - Fabrice Pointillart
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; Univ Rennes, CNRS; F-35000 Rennes France
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26
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Redox-Active Dysprosium Single-Molecule Magnet: Spectro-Electrochemistry and Theoretical Investigations. MAGNETOCHEMISTRY 2019. [DOI: 10.3390/magnetochemistry5030046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The mononuclear single-molecule magnet (SMM) [Dy(tta)3(L)]⋅C6H14 (1) (where tta− = 2-thenoyltrifluoroacetonate and L = 4,5-bis(propylthio)-tetrathiafulvalene-2-(2-pyridyl)benzimidazole-methyl-2-pyridine) was studied by spectro-electrochemistry. The resulting electronic spectra of the three oxidation states 1, 1+∙, and 12+ were rationalized by time-dependent density functional theory (TD-DFT) calculations starting from the DFT optimized structures. The modulation of the magnetic anisotropy of the DyIII center upon oxidation was also inspected at the Complete Active Space Self-Consistent Field (CASSCF) level of calculation.
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27
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Moreno-Pineda E, Taran G, Wernsdorfer W, Ruben M. Quantum tunnelling of the magnetisation in single-molecule magnet isotopologue dimers. Chem Sci 2019; 10:5138-5145. [PMID: 31183066 PMCID: PMC6524608 DOI: 10.1039/c9sc01062a] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Accepted: 04/12/2019] [Indexed: 01/19/2023] Open
Abstract
Quantum tunnelling of the magnetisation plays a major role in the magnetic properties of lanthanide Single-Molecule Magnets: while it is considered a problem for data storage device applications since it leads to information loss, it is an essential pre-requisite for the read-out and manipulation of the nuclear states in Quantum Information Processing schemes. Here we describe two isotopologue dysprosium dimers, i.e. [(163Dy(tmhd)3)2(bpym)] and [(164Dy(tmhd)3)2(bpym)] (tmd = tris(tetramethylheptanedionato) and bpym = bipyrimidine), where the nuclear spin presence or absence clearly affects the magnetic properties of the systems. Through μ-SQUID studies at milli-Kelvin temperatures and alternating current magnetic measurements, we find significant differences in the magnetic behaviour of both complexes. While simulation of the hysteresis loops at 30 mK reveals that the presence of nuclear spin does not influence the tunnelling rate, we find that it facilitates the coupling to the phonon bath enhancing the direct relaxation process; an observation reflected in the temperature and field dependence of the relaxation rates.
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Affiliation(s)
- Eufemio Moreno-Pineda
- Institute of Nanotechnology (INT) , Karlsruhe Institute of Technology (KIT) , Hermann-von-Helmholtz-Platz 1 , D-76344 Eggenstein-Leopoldshafen , Germany . ; ;
| | - Gheorghe Taran
- Physikalisches Institut , Karlsruhe Institute of Technology , D-76131 Karlsruhe , Germany
| | - Wolfgang Wernsdorfer
- Institute of Nanotechnology (INT) , Karlsruhe Institute of Technology (KIT) , Hermann-von-Helmholtz-Platz 1 , D-76344 Eggenstein-Leopoldshafen , Germany . ; ;
- Physikalisches Institut , Karlsruhe Institute of Technology , D-76131 Karlsruhe , Germany
- CNRS , Institut Néel , F-38042 Grenoble , France
| | - Mario Ruben
- Institute of Nanotechnology (INT) , Karlsruhe Institute of Technology (KIT) , Hermann-von-Helmholtz-Platz 1 , D-76344 Eggenstein-Leopoldshafen , Germany . ; ;
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) , CNRS-Université de Strasbourg , 23 rue du Loess, BP 43 , F-67034 Strasbourg Cedex 2 , France
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28
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Series of Chloranilate-Bridged Dinuclear Lanthanide Complexes: Kramers Systems Showing Field-Induced Slow Magnetic Relaxation. MAGNETOCHEMISTRY 2019. [DOI: 10.3390/magnetochemistry5020030] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A series of chloralilate-bridged dinuclear lanthanide complexes of formula [{LnIII(Tp)2}2(μ-Cl2An)]·2CH2Cl2, where Cl2An2− and Tp− represent the chloranilate and hydrotris (pyrazolyl)borate ligands, respectively, and Ln = Gd (1), Tb (2), Ho (3), Er (4), and Yb (5) was synthesized. All five complexes were characterized by an elemental analysis, infrared spectroscopy, single crystal X-ray diffraction, and SQUID measurements. The complexes 1–5 in the series were all isostructural. A comparison of the temperature dependence of the dc magnetic susceptibility data of these complexes revealed clear differences depending on the lanthanide center. Ac magnetic susceptibility measurements revealed that none of the five complexes exhibited a slow magnetic relaxation under a zero applied dc field. On the other hand, the Kramers systems (complexes 4 and 5) clearly displayed a slow magnetic relaxation under applied dc fields, suggesting field-induced single-molecule magnets that occur through Orbach and Raman relaxation processes.
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Ortu F, Reta D, Ding YS, Goodwin CAP, Gregson MP, McInnes EJL, Winpenny REP, Zheng YZ, Liddle ST, Mills DP, Chilton NF. Studies of hysteresis and quantum tunnelling of the magnetisation in dysprosium(iii) single molecule magnets. Dalton Trans 2019; 48:8541-8545. [DOI: 10.1039/c9dt01655d] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a study of quantum tunneling of the magnetisation in three Dy(iii) single-molecule magnets.
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Affiliation(s)
- Fabrizio Ortu
- School of Chemistry
- The University of Manchester
- Manchester
- UK
| | - Daniel Reta
- School of Chemistry
- The University of Manchester
- Manchester
- UK
| | - You-Song Ding
- Frontier Institute of Science and Technology
- Xi'an Jiaotong University
- Xi'an
- China
| | | | | | | | | | - Yan-Zhen Zheng
- Frontier Institute of Science and Technology
- Xi'an Jiaotong University
- Xi'an
- China
| | | | - David P. Mills
- School of Chemistry
- The University of Manchester
- Manchester
- UK
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Cador O, Le Guennic B, Pointillart F. Electro-activity and magnetic switching in lanthanide-based single-molecule magnets. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00875f] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present work reviews switching of single-molecule magnetic behaviour achieved through various stimuli such as temperature, light irradiation, redox processes, solvation/desolvation, and magnetic field.
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Affiliation(s)
- Olivier Cador
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226
- F-35000 Rennes
- France
| | - Boris Le Guennic
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226
- F-35000 Rennes
- France
| | - Fabrice Pointillart
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226
- F-35000 Rennes
- France
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