1
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Ahmed N, Sahu PP, Chakraborty A, Flores Gonzalez J, Ali J, Kalita P, Pointillart F, Singh SK, Chandrasekhar V. In situ hydrolysis of a carbophosphazene ligand leads to one-dimensional lanthanide coordination polymers. Synthesis, structure and dynamic magnetic studies. Dalton Trans 2024; 53:11563-11577. [PMID: 38921544 DOI: 10.1039/d4dt00582a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2024]
Abstract
An in situ hydrolysis of the P-Cl bonds of the carbophosphazene [{NC(NMe2)}2{NPCl2}] (LPCl2) in the presence of hydrated lanthanide(III) nitrates in a dichloromethane and methanol (2 : 1) solvent mixture afforded a series of novel 1D coordination polymers: [{Ln(LHPO2)3(NO3)2(CH3OH)(H2O)} (Cl)]n {where Ln(III) = Gd (1), Tb (2), Dy (3), or Er (4) and LHPO2 is the hydrolyzed carbophosphazene (LPCl2) ligand}. X-ray crystallographic analysis revealed that complexes 1-4 are isostructural and crystallized in the monoclinic crystal system having P21/c space group. The coordination polymers are formed because of the involvement of the geminal P(O)(OH) moieties of the carbophosphazene ligand. Each lanthanide(III) ion is 9-coordinate (9O) in a distorted muffin geometry. Magnetic measurements revealed that both DyIII and ErIII analogues exhibit field-induced single-molecule magnet (SMM) behavior at 0.8 kOe and 2.2 k Oe, respectively. At such dc fields, the dynamic magnetic susceptibility displays complex behavior with a triple magnetic relaxation contribution for 3, while two contributions were identified for 4. The observed static and dynamic magnetic behavior for complexes 1-4 were further rationalized with the aid of BS-DFT and CASSCF/SO-RASSI/SINGLE_ANISO calculations.
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Affiliation(s)
- Naushad Ahmed
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, Telangana, India.
| | - Prem Prakash Sahu
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Telangana-502285, India
| | - Amit Chakraborty
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, Telangana, India.
| | - Jessica Flores Gonzalez
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, 35000 Rennes, France
| | - Junaid Ali
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, Telangana, India.
| | - Pankaj Kalita
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, Telangana, India.
| | - Fabrice Pointillart
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, 35000 Rennes, France
| | - Saurabh Kumar Singh
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Telangana-502285, India
| | - Vadapalli Chandrasekhar
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500046, Telangana, India.
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2
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Ouellette ET, Brackbill IJ, Kynman AE, Christodoulou S, Maron L, Bergman RG, Arnold J. Triple Inverse Sandwich versus End-On Diazenido: Bonding Motifs across a Series of Rhenium-Lanthanide and -Actinide Complexes. Inorg Chem 2024; 63:7177-7188. [PMID: 38598523 DOI: 10.1021/acs.inorgchem.3c04248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
While synthesizing a series of rhenium-lanthanide triple inverse sandwich complexes, we unexpectedly uncovered evidence for rare examples of end-on lanthanide dinitrogen coordination for certain heavy lanthanide elements as well as for uranium. We begin our report with the synthesis and characterization of a series of trirhenium triple inverse sandwich complexes with the early lanthanides, Ln[(μ-η5:η5-Cp)Re(BDI)]3(THF) (1-Ln, Ln = La, Ce, Pr, Nd, Sm; Cp = cyclopentadienide, BDI = N,N'-bis(2,6-diisopropylphenyl)-3,5-dimethyl-β-diketiminate). However, as we moved across the lanthanide series, we ran into an unexpected result for gadolinium in which we structurally characterized two products for gadolinium, namely, 1-Gd (analogous to 1-Ln) and a diazenido dirhenium double inverse sandwich complex Gd[(μ-η1:η1-N2)Re(η5-Cp)(BDI)][(μ-η5:η5-Cp)Re(BDI)]2(THF)2 (2-Gd). Evidence for analogues of 2-Gd was spectroscopically observed for other heavy lanthanides (2-Ln, Ln = Tb, Dy, Er), and, in the case of 2-Er, structurally authenticated. These complexes represent the first observed examples of heterobimetallic end-on lanthanide dinitrogen coordination. Density functional theory (DFT) calculations were utilized to probe relevant bonding interactions and reveal energetic differences between both the experimental and putative 1-Ln and 2-Ln complexes. We also present additional examples of novel end-on heterobimetallic lanthanide and actinide diazenido moieties in the erbium-rhenium complex (η8-COT)Er[(μ-η1:η1-N2)Re(η5-Cp)(BDI)](THF)(Et2O) (3-Er) and uranium-rhenium complex [Na(2.2.2-cryptand)][(η5-C5H4SiMe3)3U(μ-η1:η1-N2)Re(η5-Cp)(BDI)] (4-U). Finally, we expand the scope of rhenium inverse sandwich coordination by synthesizing divalent double inverse sandwich complex Yb[(μ-η5:η5-Cp)Re(BDI)]2(THF)2 (5-Yb), as well as base-free, homoleptic rhenium-rare earth triple inverse sandwich complex Y[(μ-η5:η5-Cp)Re(BDI)]3 (6-Y).
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Affiliation(s)
- Erik T Ouellette
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - I Joseph Brackbill
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Amy E Kynman
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Stella Christodoulou
- LPCNO, Université de Toulouse, INSA Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Laurent Maron
- LPCNO, Université de Toulouse, INSA Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Robert G Bergman
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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3
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Bernbeck M, Orlova AP, Hilgar JD, Gembicky M, Ozerov M, Rinehart JD. Dipolar Coupling as a Mechanism for Fine Control of Magnetic States in ErCOT-Alkyl Molecular Magnets. J Am Chem Soc 2024; 146:7243-7256. [PMID: 38456803 PMCID: PMC10958522 DOI: 10.1021/jacs.3c10412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 02/13/2024] [Accepted: 02/14/2024] [Indexed: 03/09/2024]
Abstract
The design of molecular magnets has progressed greatly by taking advantage of the ability to impart successive perturbations and control vibronic transitions in 4fn systems through the careful manipulation of the crystal field. Herein, we control the orientation and rigidity of two dinuclear ErCOT-based molecular magnets: the inversion-symmetric bridged [ErCOT(μ-Me)(THF)]2 (2) and the nearly linear Li[(ErCOT)2(μ-Me)3] (3). The conserved anisotropy of the ErCOT synthetic unit facilitates the direction of the arrangement of its magnetic anisotropy for the purposes of generating controlled internal magnetic fields, improving control of the energetics and transition probabilities of the electronic angular momentum states with exchange biasing via dipolar coupling. This control is evidenced through the introduction of a second thermal barrier to relaxation operant at low temperatures that is twice as large in 3 as in 2. This barrier acts to suppress through-barrier relaxation by protecting the ground state from interacting with stray local fields while operating at an energy scale an order of magnitude smaller than the crystal field term. These properties are highlighted when contrasted against the mononuclear structure ErCOT(Bn)(THF)2 (1), in which quantum tunneling of the magnetization processes dominate, as demonstrated by magnetometry and ab initio computational methods. Furthermore, far-infrared magnetospectroscopy measurements reveal that the increased rigidity imparted by successive removal of solvent ligands when adding bridging methyl groups, along with the increased excited state purity, severely limits local spin-vibrational interactions that facilitate magnetic relaxation, manifesting as longer relaxation times in 3 relative to those in 2 as temperature is increased.
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Affiliation(s)
- Maximilian
G. Bernbeck
- Department
of Chemistry and Biochemistry, University
of California—San Diego, La Jolla, California 92093, United States
| | - Angelica P. Orlova
- Department
of Chemistry and Biochemistry, University
of California—San Diego, La Jolla, California 92093, United States
| | - Jeremy D. Hilgar
- Department
of Chemistry and Biochemistry, University
of California—San Diego, La Jolla, California 92093, United States
| | - Milan Gembicky
- Department
of Chemistry and Biochemistry, University
of California—San Diego, La Jolla, California 92093, United States
| | - Mykhaylo Ozerov
- National
High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Jeffrey D. Rinehart
- Department
of Chemistry and Biochemistry, University
of California—San Diego, La Jolla, California 92093, United States
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4
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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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5
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Liu D, Guo X, Zhang X, Al-Kahtani AA, Chibotaru LF. Building Molecular Nanomagnets by Encapsulating Lanthanide Ions in Boron Nitride Nanotubes: Ab Initio Investigation. Inorg Chem 2024; 63:3769-3780. [PMID: 38346334 DOI: 10.1021/acs.inorgchem.3c03930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Lanthanide-based single-ion magnets have attracted much interest due to their great potential for information storage at the level of one molecule. Among various strategies to enhance magnetization blocking in such complexes, the synthesis of axially symmetric compounds is regarded as the most promising. Here, we investigate theoretically the magnetization blocking of several lanthanide ions (Tb3+, Dy3+, Ho3+, Er3+, and Tm3+) encapsulated in highly symmetric zigzag boron nitride nanotubes (BNNTs) of different diameters with ab initio methodology. We found that Tb3+@(7,0)BNNT, Dy3+@(7,0)BNNT, and Tm3+@(5,0)BNNT are suitable SIM candidates, while the other investigated complexes from this series show no signs of magnetization blocking owing to a hard competition between contributions to the crystal field of the lanthanide ion from neighboring and more distant atoms of the nanotube.
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Affiliation(s)
- Dan Liu
- School of Sciences, Great Bay University, Dongguan 523000, China
- Great Bay Institute for Advanced Study, Dongguan 523000, China
- Institute of Flexible Electronics, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, Shaanxi 710072, China
| | - Xuefeng Guo
- Institute of Flexible Electronics, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, Shaanxi 710072, China
| | - Xiaoyong Zhang
- School of Sciences, Great Bay University, Dongguan 523000, China
- Great Bay Institute for Advanced Study, Dongguan 523000, China
| | - Abdullah A Al-Kahtani
- Chemistry Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Liviu F Chibotaru
- Theory of Nanomaterials Group, Katholieke Universiteit Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
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6
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Chiesa A, Santini P, Garlatti E, Luis F, Carretta S. Molecular nanomagnets: a viable path toward quantum information processing? REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2024; 87:034501. [PMID: 38314645 DOI: 10.1088/1361-6633/ad1f81] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 01/17/2024] [Indexed: 02/06/2024]
Abstract
Molecular nanomagnets (MNMs), molecules containing interacting spins, have been a playground for quantum mechanics. They are characterized by many accessible low-energy levels that can be exploited to store and process quantum information. This naturally opens the possibility of using them as qudits, thus enlarging the tools of quantum logic with respect to qubit-based architectures. These additional degrees of freedom recently prompted the proposal for encoding qubits with embedded quantum error correction (QEC) in single molecules. QEC is the holy grail of quantum computing and this qudit approach could circumvent the large overhead of physical qubits typical of standard multi-qubit codes. Another important strength of the molecular approach is the extremely high degree of control achieved in preparing complex supramolecular structures where individual qudits are linked preserving their individual properties and coherence. This is particularly relevant for building quantum simulators, controllable systems able to mimic the dynamics of other quantum objects. The use of MNMs for quantum information processing is a rapidly evolving field which still requires to be fully experimentally explored. The key issues to be settled are related to scaling up the number of qudits/qubits and their individual addressing. Several promising possibilities are being intensively explored, ranging from the use of single-molecule transistors or superconducting devices to optical readout techniques. Moreover, new tools from chemistry could be also at hand, like the chiral-induced spin selectivity. In this paper, we will review the present status of this interdisciplinary research field, discuss the open challenges and envisioned solution paths which could finally unleash the very large potential of molecular spins for quantum technologies.
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Affiliation(s)
- A Chiesa
- Dipartimento di Scienze Matematiche, Fisiche e Informatiche, Università di Parma, I-43124 Parma, Italy
- INFN-Sezione di Milano-Bicocca, Gruppo Collegato di Parma, 43124 Parma, Italy
- UdR Parma, INSTM, I-43124 Parma, Italy
| | - P Santini
- Dipartimento di Scienze Matematiche, Fisiche e Informatiche, Università di Parma, I-43124 Parma, Italy
- INFN-Sezione di Milano-Bicocca, Gruppo Collegato di Parma, 43124 Parma, Italy
- UdR Parma, INSTM, I-43124 Parma, Italy
| | - E Garlatti
- Dipartimento di Scienze Matematiche, Fisiche e Informatiche, Università di Parma, I-43124 Parma, Italy
- INFN-Sezione di Milano-Bicocca, Gruppo Collegato di Parma, 43124 Parma, Italy
- UdR Parma, INSTM, I-43124 Parma, Italy
| | - F Luis
- Instituto de Nanociencia y Materiales de Aragon (INMA), CSIC, Universidad de Zaragoza, Zaragoza, Spain
- Departamento de Fısica de la Materia Condensada, Universidad de Zaragoza, Zaragoza, Spain
| | - S Carretta
- Dipartimento di Scienze Matematiche, Fisiche e Informatiche, Università di Parma, I-43124 Parma, Italy
- INFN-Sezione di Milano-Bicocca, Gruppo Collegato di Parma, 43124 Parma, Italy
- UdR Parma, INSTM, I-43124 Parma, Italy
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7
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Vieru V, Gómez-Coca S, Ruiz E, Chibotaru LF. Increasing the Magnetic Blocking Temperature of Single-Molecule Magnets. Angew Chem Int Ed Engl 2024; 63:e202303146. [PMID: 37539652 DOI: 10.1002/anie.202303146] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 07/18/2023] [Accepted: 08/02/2023] [Indexed: 08/05/2023]
Abstract
The synthesis of single-molecule magnets (SMMs), magnetic complexes capable of retaining magnetization blocking for a long time at elevated temperatures, has been a major concern for magnetochemists over the last three decades. In this review, we describe basic SMMs and the different approaches that allow high magnetization-blocking temperatures to be reached. We focus on the basic factors affecting magnetization blocking, magnetic axiality and the height of the blocking barrier, which can be used to group different families of complexes in terms of their SMM efficiency. Finally, we discuss several practical routes for the design of mono- and polynuclear complexes that could be applied in memory devices.
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Affiliation(s)
- Veacheslav Vieru
- Maastricht Science Programme, Faculty of Science and Engineering, Maastricht University, 6229 EN, Maastricht, The Netherlands
| | - Silvia Gómez-Coca
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, 08028, Barcelona, Spain
- Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, 08028, Barcelona, Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, 08028, Barcelona, Spain
- Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, 08028, Barcelona, Spain
| | - Liviu F Chibotaru
- Theory of Nanomaterials Group, Katholieke Universiteit Leuven, 3001, Leuven, Belgium
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8
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Baker CF, Seed JA, Adams RW, Lee D, Liddle ST. 13C carbene nuclear magnetic resonance chemical shift analysis confirms Ce IV[double bond, length as m-dash]C double bonding in cerium(iv)-diphosphonioalkylidene complexes. Chem Sci 2023; 15:238-249. [PMID: 38131084 PMCID: PMC10732143 DOI: 10.1039/d3sc04449a] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 11/27/2023] [Indexed: 12/23/2023] Open
Abstract
Diphosphonioalkylidene dianions have emerged as highly effective ligands for lanthanide and actinide ions, and the resulting formal metal-carbon double bonds have challenged and developed conventional thinking about f-element bond multiplicity and covalency. However, f-element-diphosphonioalkylidene complexes can be represented by several resonance forms that render their metal-carbon double bond status unclear. Here, we report an experimentally-validated 13C Nuclear Magnetic Resonance computational assessment of two cerium(iv)-diphosphonioalkylidene complexes, [Ce(BIPMTMS)(ODipp)2] (1, BIPMTMS = {C(PPh2NSiMe3)2}2-; Dipp = 2,6-diisopropylphenyl) and [Ce(BIPMTMS)2] (2). Decomposing the experimental alkylidene chemical shifts into their corresponding calculated shielding (σ) tensor components verifies that these complexes exhibit Ce[double bond, length as m-dash]C double bonds. Strong magnetic coupling of Ce[double bond, length as m-dash]C σ/π* and π/σ* orbitals produces strongly deshielded σ11 values, a characteristic hallmark of alkylidenes, and the largest 13C chemical shift tensor spans of any alkylidene complex to date (1, 801 ppm; 2, 810 ppm). In contrast, the phosphonium-substituent shielding contributions are much smaller than the Ce[double bond, length as m-dash]C σ- and π-bond components. This study confirms significant Ce 4f-orbital contributions to the Ce[double bond, length as m-dash]C bonding, provides further support for a previously proposed inverse-trans-influence in 2, and reveals variance in the 4f spin-orbit contributions that relate to the alkylidene hybridisation. This work thus confirms the metal-carbon double bond credentials of f-element-diphosphonioalkylidenes, providing quantified benchmarks for understanding diphosphonioalkylidene bonding generally.
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Affiliation(s)
- Cameron F Baker
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - John A Seed
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Ralph W Adams
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Daniel Lee
- Department of Chemical Engineering, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Stephen T Liddle
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
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9
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Arumugam S, Schwarz B, Ravichandran P, Kumar S, Ungur L, Mondal KC. Dipotassiumtetrachloride-bridged dysprosium metallocenes: a single-molecule magnet. Dalton Trans 2023; 52:15326-15333. [PMID: 37387215 DOI: 10.1039/d3dt01325a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Abstract
The present work describes the dynamic magnetic properties of the complex [(CpAr3)4DyIII2Cl4K2]·3.5(C7H8) (1), synthesized by employing a tri-aryl-substituted cyclopentadienyl ligand (CpAr3), [4,4'-(4-phenylcyclopenta-1,3-diene-1,2-diyl)bis(methylbenzene) = CpAr3H]. Each Dy(III)-metallocene weakly couples via K2Cl4, displaying slow relaxation of magnetization below 14.5 K under zero applied dc field via KD3 energy levels with an energy barrier of 136.9/133.7 cm-1 on the Dy sites. The single-ion axial anisotropy energy barrier is reduced by geometrical distortion due to the coordination of two chloride ions at each Dy centre.
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Affiliation(s)
- Selvakumar Arumugam
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, India.
| | - Björn Schwarz
- Institute for Applied Materials - Energy Storage Systems (IAM-ESS), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
| | | | - Sunil Kumar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, India.
| | - Liviu Ungur
- Department of Chemistry, National University of Singapore, Singapore.
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10
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Gransbury G, Corner SC, Kragskow JGC, Evans P, Yeung HM, Blackmore WJA, Whitehead GFS, Vitorica-Yrezabal IJ, Oakley MS, Chilton NF, Mills DP. AtomAccess: A Predictive Tool for Molecular Design and Its Application to the Targeted Synthesis of Dysprosium Single-Molecule Magnets. J Am Chem Soc 2023; 145:22814-22825. [PMID: 37797311 PMCID: PMC10591469 DOI: 10.1021/jacs.3c08841] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Indexed: 10/07/2023]
Abstract
Isolated dysprosocenium cations, [Dy(CpR)2]+ (CpR = substituted cyclopentadienyl), have recently been shown to exhibit superior single-molecule magnet (SMM) properties over closely related complexes with equatorially bound ligands. However, gauging the crossover point at which the CpR substituents are large enough to prevent equatorial ligand binding, but small enough to approach the metal closely and generate strong crystal field splitting has required laborious synthetic optimization. We therefore created the computer program AtomAccess to predict the accessibility of a metal binding site and its ability to accommodate additional ligands. Here, we apply AtomAccess to identify the crossover point for equatorial coordination in [Dy(CpR)2]+ cations in silico and hence predict a cation that is at the cusp of stability without equatorial interactions, viz., [Dy(Cpttt)(Cp*)]+ (Cpttt = C5H2tBu3-1,2,4, Cp* = C5Me5). Upon synthesizing this cation, we found that it crystallizes as either a contact ion-pair, [Dy(Cpttt)(Cp*){Al[OC(CF3)3]4-κ-F}], or separated ion-pair polymorph, [Dy(Cpttt)(Cp*)][Al{OC(CF3)3}4]·C6H6. Upon characterizing these complexes, together with their precursors, yttrium and yttrium-doped analogues, we find that the contact ion-pair shows inferior SMM properties to the separated ion-pair, as expected, due to faster Raman and quantum tunneling of magnetization relaxation processes, while the Orbach region is relatively unaffected. The experimental verification of the predicted crossover point for equatorial coordination in this work tests the limitations of the use of AtomAccess as a predictive tool and also indicates that the application of this type of program shows considerable potential to boost efficiency in exploratory synthetic chemistry.
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Affiliation(s)
| | | | - Jon G. C. Kragskow
- Department of Chemistry, The
University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Peter Evans
- Department of Chemistry, The
University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Hing Man Yeung
- Department of Chemistry, The
University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - William J. A. Blackmore
- Department of Chemistry, The
University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - George F. S. Whitehead
- Department of Chemistry, The
University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | | | - Meagan S. Oakley
- Department of Chemistry, The
University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Nicholas F. Chilton
- Department of Chemistry, The
University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - David P. Mills
- Department of Chemistry, The
University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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11
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Mao PD, Zhang SH, Yao NT, Sun HY, Yan FF, Zhang YQ, Meng YS, Liu T. Regulating Magnetic Relaxations of Cyano-Bridged {Dy III Mo V } Systems by Tuning the N-Sites in β-Diketone Ligands. Chemistry 2023; 29:e202301262. [PMID: 37272418 DOI: 10.1002/chem.202301262] [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: 04/25/2023] [Revised: 05/28/2023] [Accepted: 05/30/2023] [Indexed: 06/06/2023]
Abstract
Cyano-bridged 4d-4f molecular nanomagnets have re-called increasing research interests in molecular magnetism since they offer more possibilities in achieving novel nanomagnets with versatile structures and magnetic interactions. In this work, four β-diketone ligands bearing different substitution N-sites were designed and synthesized, namely 1-(2-pyridyl)-3-(3-pyridyl)-1,3-propanedione (HL1 ), 1,3-Bis (3-pyridyl)-1,3-propanedione (HL2 ), 1-(4-pyridyl)-3-(3-pyridyl)-1,3-propanedione (HL3 ), and 1,3-Bis (4-pyridyl)-1,3-propanedione (HL4 ), to tune the magnetic relaxation behaviors of cyano-bridged {DyIII MoV } systems. By reacting with DyCl3 ⋅ 6H2 O and K4 Mo(CN)8 ⋅ 2H2 O, four cyano-bridged complexes, namely {[Dy[MoV (CN)8 ](HL1 )2 (H2 O)3 ]} ⋅ 6H2 O (1), {[Dy[MoV (CN)8 ](HL2 )(H2 O)3 (CH3 OH)]}2 ⋅ 2CH3 OH ⋅ 3H2 O (2), {[Dy[MoV (CN)8 ](HL3 )(H2 O)2 (CH3 OH)] ⋅ H2 O}n (3), and {[Dy[MoV (CN)8 ](HL4 )2 (H2 O)3 ]} ⋅ 2H2 O⋅CH3 OH (4) were obtained. Structural analyses revealed that 1 and 4 are binuclear complexes, 2 has a tetragonal structure, and 3 exhibits a stair-like polymer chain structure. The DyIII ions in all complexes have eight-coordinated configurations with the coordination spheres DyO7 N1 for 1 and 4, DyO6 N2 for 2, and DyO5 N3 for 3. Magnetic measurements indicate that 1 is a zero-field single-molecule magnet (SMM) and complexes 2-4 are field-induced SMMs, with complex 4 featuring a two-step relaxation process. The magnetic characterizations and ab initio calculations revealed that changing the N-sites in the β-diketone ligands can effectively alter the structures and magnetic properties of cyano-bridged 4d-4f nanomagnets by adjusting the coordination environments of the DyIII centers.
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Affiliation(s)
- Pan-Dong Mao
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Shi-Hui Zhang
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Nian-Tao Yao
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Hui-Ying Sun
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Fei-Fei Yan
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Yi-Quan Zhang
- Jiangsu Key Lab for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing, 210023, China
| | - Yin-Shan Meng
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Tao Liu
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
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12
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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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13
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Wang J, Sun CY, Zheng Q, Wang DQ, Chen YT, Ju JF, Sun TM, Cui Y, Ding Y, Tang YF. Lanthanide Single-molecule Magnets: Synthetic Strategy, Structures, Properties and Recent Advances. Chem Asian J 2023; 18:e202201297. [PMID: 36802202 DOI: 10.1002/asia.202201297] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/30/2023] [Accepted: 02/20/2023] [Indexed: 02/23/2023]
Abstract
Single-molecule magnets (SMMs) show wide potential applications in the field of ultrahigh-density storage materials, quantum computing, spintronics, and so on. Lanthanide (Ln) SMMs, as an important category of SMMs, open up a promising prospect due to their large magnetic moments and huge magnetic anisotropy. However, the construction of high performance for Ln SMMs remains an enormous challenge. Although remarkable advances are focused on the topic of Ln SMMs, the research on Ln SMMs with different nuclear numbers is still deficient. Therefore, this review summarizes the design strategies for the construction of Ln SMMs, as well as the metal skeleton types. Furthermore, we collect reported Ln SMMs with mononuclearity, dinuclearity, and multinuclearity (three or more Ln spin centers) and the SMM properties including energy barrier (Ueff ) and pre-exponential factor (τ0 ) are described. Finally, Ln SMMs with low-nuclearity SMMs, especially for single-ion magnets (SIMs), are highlighted to understand the correlations between structures and magnetic behavior of the detail SMM properties are described. We expect the review can shed light on the future developments of high-performance Ln SMMs.
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Affiliation(s)
- Jin Wang
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China.,Nantong Key Lab of Intelligent and New Energy Materials, Nantong, Jiangsu 226019, P. R. China
| | - Cheng-Yuan Sun
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Qi Zheng
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Dan-Qi Wang
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Yu-Ting Chen
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Jian-Feng Ju
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Tong-Ming Sun
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Ying Cui
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Yan Ding
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China
| | - Yan-Feng Tang
- School of Chemistry and Chemical Engineering, Nantong University, Jiangsu, 226019, P. R. China.,Nantong Key Lab of Intelligent and New Energy Materials, Nantong, Jiangsu 226019, P. R. China
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14
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Mironov VS, Bazhenova TA, Manakin YV, Yagubskii EB. Pentagonal-bipyramidal 4d and 5d complexes with unquenched orbital angular momentum as a unique platform for advanced single-molecule magnets: current state and perspectives. Dalton Trans 2023; 52:509-539. [PMID: 36537237 DOI: 10.1039/d2dt02954e] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This article overviews the current state and prospects of the concept of advanced single-molecule magnets (SMMs) based on low-spin (S = 1/2) pentagonal-bipyramidal (PBP) 4d3 and 5d3 complexes with unquenched orbital angular momentum. This approach is based on the unique property of PBP 4d3 and 5d3 complexes to cause highly anisotropic spin coupling of perfect uniaxial symmetry, -JzSziSzj - Jxy(SxiSxj + SyiSyj), regardless of the local geometric symmetry. The M(4d/5d)-M(3d) exchange-coupled pairs in the apical positions of the PBP complexes produce Ising-type exchange interactions (|Jz| > |Jxy|), which serve as a powerful source of uniaxial magnetic anisotropy of a SMM cluster. In polynuclear heterometallic 4d/5d-3d complexes embodying PBP 4d/5d units and high-spin 3d ions, anisotropic Ising-type exchange interactions produce a double-well potential with high energy barriers Ueff, which is controlled by the anisotropic exchange parameters Jz, Jxy. Theoretical analysis shows that the barrier is proportional to the difference |Jz - Jxy| and to the number n of the apical 4d/5d-3d pairs in a SMM cluster, Ueff ∝ |Jz - Jxy|n, which provides an opportunity to scale up the barrier Ueff and blocking temperature TB up to the record values. A novel family of 4d/5d complexes with forced PBP coordination provided by structurally rigid planar pentadentate Schiff-base ligands in the equatorial plane is discussed as a better alternative to the cyanometallates. The possibility of a significant increase in the anisotropic exchange parameters Jz, Jxy in PBP complexes with monoatomic apical μ-bridging ligands is examined. The basic principles of molecular engineering the highest barrier through anisotropic exchange interactions of PBP 4d/5d complexes are formulated. The theoretical and experimental results taken together indicate that the concept of high-performance SMMs based on 4d/5d PBP complexes with unquenched orbital angular momentum is an attractive alternative to the currently dominant lanthanide-based SMM strategy.
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Affiliation(s)
- V S Mironov
- Institute of Problems of Chemical Physics RAS, Federal Research Center of Problems of Chemical Physics and Medical Chemistry RAS, Chernogolovka 142432, Russia. .,Shubnikov Institute of Crystallography of Federal Scientific Research Centre "Crystallography and Photonics" RAS, Moscow, Russia
| | - T A Bazhenova
- Institute of Problems of Chemical Physics RAS, Federal Research Center of Problems of Chemical Physics and Medical Chemistry RAS, Chernogolovka 142432, Russia.
| | - Yu V Manakin
- Institute of Problems of Chemical Physics RAS, Federal Research Center of Problems of Chemical Physics and Medical Chemistry RAS, Chernogolovka 142432, Russia.
| | - E B Yagubskii
- Institute of Problems of Chemical Physics RAS, Federal Research Center of Problems of Chemical Physics and Medical Chemistry RAS, Chernogolovka 142432, Russia.
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15
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Synthesis, Luminescence and magnetic properties of dinuclear complexes based on a “pincer” Schiff base and different β-diketonate ligands. Polyhedron 2023. [DOI: 10.1016/j.poly.2023.116298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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16
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Abstract
Three decades of research in molecular nanomagnets have raised their magnetic memories from liquid helium to liquid nitrogen temperature thanks to a wise choice of the magnetic ion and coordination environment. Still, serendipity and chemical intuition played a main role. In order to establish a powerful framework for statistically driven chemical design, here we collected chemical and physical data for lanthanide-based nanomagnets, catalogued over 1400 published experiments, developed an interactive dashboard (SIMDAVIS) to visualise the dataset, and applied inferential statistical analysis. Our analysis shows that the Arrhenius energy barrier correlates unexpectedly well with the magnetic memory. Furthermore, as both Orbach and Raman processes can be affected by vibronic coupling, chemical design of the coordination scheme may be used to reduce the relaxation rates. Indeed, only bis-phthalocyaninato sandwiches and metallocenes, with rigid ligands, consistently present magnetic memory up to high temperature. Analysing magnetostructural correlations, we offer promising strategies for improvement, in particular for the preparation of pentagonal bipyramids, where even softer complexes are protected against molecular vibrations.
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17
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Li RX, Sun HY, Liang HC, Yi C, Yao NT, Meng YS, Xiong J, Liu T, Zhu YY. Slow magnetic relaxation in mononuclear octa-coordinate Fe(II) and Co(II) complexes from a Bpybox ligand. Dalton Trans 2022; 51:8865-8873. [PMID: 35635033 DOI: 10.1039/d2dt00865c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two 3d transition metal mononuclear complexes, [(FeL2)(ClO4)2]2·CH3CN (1) and (CoL2)(ClO4)2·2CH3CN (2), have been prepared from a rigid tetradentate bpybox (L = 6,6'-bis(2,5-dihydrooxazol-4-yl)-2,2'-bipyridine) ligand. Single crystal X-ray diffraction analyses together with the help of calculations show that both compounds are octa-coordinate. Direct current magnetic studies reveal their significant magnetic anisotropy. Impressively, field-induced relaxation of magnetism is observed in the two complexes and the apparent anisotropy barriers are 14.1 K for 1 and 21.6 K for 2, respectively. Theoretical calculations reveal that two Fe(II) centers in 1 have small negative D values of -4.897 and -4.825 cm-1 and relatively small E values of 0.646 and 0.830 cm-1, indicating a uniaxial magnetic anisotropy. In contrast, the D and E values in the Co(II) center of 2 are 46.42 cm-1 and 11.51 cm-1, featuring a rhombic anisotropy. This work demonstrates that field-induced slow magnetic relaxation in 3d transition metal complexes with high coordination numbers can be manipulated through rigid ligand design.
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Affiliation(s)
- Rui-Xia Li
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China.
| | - Hui-Ying Sun
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China.
| | - Hai-Chao Liang
- School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei 230009, China.
| | - Cheng Yi
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China.
| | - Nian-Tao Yao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China.
| | - Yin-Shan Meng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China.
| | - Jin Xiong
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
| | - Tao Liu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China.
| | - Yuan-Yuan Zhu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China. .,School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei 230009, China.
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18
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Guo FS, He M, Huang GZ, Giblin SR, Billington D, Heinemann FW, Tong ML, Mansikkamäki A, Layfield RA. Discovery of a Dysprosium Metallocene Single-Molecule Magnet with Two High-Temperature Orbach Processes. Inorg Chem 2022; 61:6017-6025. [PMID: 35420419 PMCID: PMC9044448 DOI: 10.1021/acs.inorgchem.1c03980] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Magnetic bistability
in single-molecule magnets (SMMs) is a potential
basis for new types of nanoscale information storage material. The
standard model for thermally activated relaxation of the magnetization
in SMMs is based on the occurrence of a single Orbach process. Here,
we show that incorporating a phosphorus atom into the framework of
the dysprosium metallocene [(CpiPr5)Dy(CpPEt4)]+[B(C6F5)4]− (CpiPr5 is penta-isopropylcyclopentadienyl,
CpPEt4 is tetraethylphospholyl) leads to the occurrence
of two distinct high-temperature Orbach processes, with energy barriers
of 1410(10) and 747(7) cm–1, respectively. These
barriers provide experimental evidence for two different spin–phonon
coupling regimes, which we explain with the aid of ab initio calculations.
The strong and highly axial crystal field in this SMM also allows
magnetic hysteresis to be observed up to 70 K, using a scan rate of
25 Oe s–1. In characterizing this SMM, we show that
a conventional Debye model and consideration of rotational contributions
to the spin–phonon interaction are insufficient to explain
the observed phenomena. A
phospholyl-ligated dysprosium metallocene single-molecule
magnet shows two high-temperature Orbach relaxation processes with
effective energy barriers of 1410(10) and 747(7) cm−1, and magnetic hysteresis up to 70 K when using a scan rate of 25
Oe s−1.
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Affiliation(s)
- Fu-Sheng Guo
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QR, U.K
| | - Mian He
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QR, U.K
| | - Guo-Zhang Huang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of the Ministry of Education, School of Chemistry, Sun-Yat Sen University, Guangzhou 510006, P. R. China
| | - Sean R Giblin
- School of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA, U.K
| | - David Billington
- School of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA, U.K
| | - Frank W Heinemann
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-University Erlangen-Nürnberg, Egerlandstrabe 1, 91058 Erlangen, Germany
| | - Ming-Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of the Ministry of Education, School of Chemistry, Sun-Yat Sen University, Guangzhou 510006, P. R. China
| | - Akseli Mansikkamäki
- NMR Research Group, University of Oulu, P.O. Box 8000, Oulu FI-90014, Finland
| | - Richard A Layfield
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QR, U.K
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19
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Abstract
The number of rare earth (RE) starting materials used in synthesis is staggering, ranging from simple binary metal-halide salts to borohydrides and "designer reagents" such as alkyl and organoaluminate complexes. This review collates the most important starting materials used in RE synthetic chemistry, including essential information on their preparations and uses in modern synthetic methodologies. The review is divided by starting material category and supporting ligands (i.e., metals as synthetic precursors, halides, borohydrides, nitrogen donors, oxygen donors, triflates, and organometallic reagents), and in each section relevant synthetic methodologies and applications are discussed.
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Affiliation(s)
- Fabrizio Ortu
- School of Chemistry, University of Leicester, LE1 7RH Leicester, U.K.
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20
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Du J, Duan B, Gao L, Jiang Z, Sun L, Ma P, Li M. A centrosymmetric Dy2 compound derived from acylhydrazone Schiff base ligand exhibiting zero-field single-molecule magnet behavior. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132223] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Borah A, Murugavel R. Magnetic relaxation in single-ion magnets formed by less-studied lanthanide ions Ce(III), Nd(III), Gd(III), Ho(III), Tm(II/III) and Yb(III). Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214288] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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22
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Carroll XB, Errulat D, Murugesu M, Jenkins DM. Late Lanthanide Macrocyclic Tetra-NHC Complexes. Inorg Chem 2022; 61:1611-1619. [PMID: 34990145 DOI: 10.1021/acs.inorgchem.1c03416] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An isostructural set of macrocyclic tetra-N-heterocyclic carbene (NHC) complexes were synthesized on late lanthanides including Lu, Yb, Ho, Dy, and Gd. They were characterized by single-crystal X-ray diffraction, multinuclear NMR, electrochemistry, and SQUID magnetometry. Solid-state structures show that all complexes are in a highly distorted square-pyramidal geometry with an axial HMDS ligand. 1H NMR for Lu, Yb, and Dy demonstrates that these geometries are maintained in solution. Electrochemical measurements on the Yb complex show that the NHCs are very strong σ-donors compared to other organometallic Yb complexes. Magnetic measurements of the Yb and Dy complexes reveal slow relaxation of the magnetization in both complexes. The highly anisotropic Dy complex possesses an energy barrier to spin reversal of 52.42 K/36.43 cm-1 and waist-restricted hysteresis up to 2.8 K. Finally, an 18-atom macrocycle variant of the Lu complex was synthesized for comparison in reactivity and stability. These complexes are the first lanthanides prepared with macrocyclic NHCs and suggest that NHCs may be a promising ligand for developing single-molecule magnets.
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Affiliation(s)
- Xian B Carroll
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Dylan Errulat
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - David M Jenkins
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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23
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Kumar P, Flores Gonzalez J, Sahu PP, Ahmed N, Acharya J, Kumar V, Cador O, Pointillart F, Singh SK, Chandrasekhar V. Magnetocaloric effect and slow magnetic relaxation in peroxide-assisted tetranuclear lanthanide assemblies. Inorg Chem Front 2022. [DOI: 10.1039/d2qi01260j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Investigation of a series of rare peroxide-assisted tetranuclear lanthanide assemblies revealed both significant magnetocaloric effect and slow magnetic relaxation.
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Affiliation(s)
- Pawan Kumar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Jessica Flores Gonzalez
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, 35000 Rennes, France
| | - Prem Prakash Sahu
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana 502285, India
| | - Naushad Ahmed
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad 500046, Telangana, India
| | - Joydev Acharya
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Vierandra Kumar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Olivier Cador
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, 35000 Rennes, France
| | - Fabrice Pointillart
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, 35000 Rennes, France
| | - Saurabh Kumar Singh
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana 502285, India
| | - Vadapalli Chandrasekhar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad 500046, Telangana, India
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24
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Zhu Z, Tang J. Metal–metal bond in lanthanide single-molecule magnets. Chem Soc Rev 2022; 51:9469-9481. [DOI: 10.1039/d2cs00516f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This review surveys recent critical advances in lanthanide SMMs, highlighting the influences of metal–metal bonds on the magnetization dynamics.
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Affiliation(s)
- Zhenhua Zhu
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jinkui Tang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China
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25
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Xi J, Cen P, Guo Y, Li Y, Qin Y, Zhang YQ, Song W, Liu X. Reversible on-off switching of Dy(III) single-molecule magnets via single-crystal-to-single-crystal transformation. Dalton Trans 2022; 51:6707-6717. [DOI: 10.1039/d2dt00501h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
While the interest in single-molecule magnets (SMMs) lies in their potential applications in information storage and quantum computing, the switching of their slow magnetic relaxation associated with dynamic crystal-to-crystal transformation...
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26
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Li Y, Xi J, Ferrando-Soria J, Zhang YQ, Wang W, Song Y, Guo Y, Pardo E, Liu X. Slow magnetic relaxation in a trigonal-planar mononuclear Fe(II) complex. Dalton Trans 2022; 51:8266-8272. [DOI: 10.1039/d2dt00899h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on a β-diketiminate ligand, an iron(III) tetrahedral high-spin complex, [LFeIII(Cl)2] (1), and an iron(II) high-spin triangular planar complex, [LFeIICl] (2), have been synthesized and structurally characterized. Also, complex 1...
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27
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Cerdeira AC, Leal JP, Avó J, Viola C, Casimiro MH, Ferreira LM, Paz FAA, Pereira LCJ, Pereira CCL, Monteiro B. Multifunctionality of the [C 2mim][Ln(fod) 4] series (Ln = Nd–Tm except Pm): magnetic, luminescence and thermochemical studies. NEW J CHEM 2022. [DOI: 10.1039/d2nj01415g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The [C2mim][Ln(fod)4] series presents a rare and reversible polymorphism, NIR and visible emission as well as SMM behavior. The varieties of physical behaviors make these compounds suitable for potential technological and/or biomedical applications.
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Affiliation(s)
- Ana C. Cerdeira
- Centro de Ciências e Tecnologias Nucleares (C2TN), DECN, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, 2695-066 Bobadela, Portugal
| | - João P. Leal
- Centro de Química Estrutural (CQE), Institute of Molecular Sciences, DECN, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, 2695-066 Bobadela, Portugal
| | - João Avó
- Associate Laboratory i4HB–Institute for Health and Bioeconomy and Institute for Bioengineering and Biosciences (IBB), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lis-boa, Portugal
| | - Catarina Viola
- LAQV-REQUIMTE, Dep. de Química, Universidade Nova de Lisboa, 2829-516, Monte de Caparica, Portugal
| | - Maria H. Casimiro
- Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lis-boa, Campus Tecnológico e Nuclear, Estrada Nacional 10, 2695-066 Bobadela, Portugal
| | - Luis M. Ferreira
- Centro de Ciências e Tecnologias Nucleares (C2TN), DECN, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, 2695-066 Bobadela, Portugal
| | - Filipe A. A. Paz
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Laura C. J. Pereira
- Centro de Ciências e Tecnologias Nucleares (C2TN), DECN, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, 2695-066 Bobadela, Portugal
| | - Cláudia C. L. Pereira
- LAQV-REQUIMTE, Dep. de Química, Universidade Nova de Lisboa, 2829-516, Monte de Caparica, Portugal
| | - Bernardo Monteiro
- Centro de Química Estrutural (CQE), Institute of Molecular Sciences, DEQ, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, 2695-066 Bobadela, Portugal
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28
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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: 31] [Impact Index Per Article: 15.5] [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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29
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Dong HM, Liu ZY, Tang HM, Yang EC, Zhang YQ, Zhao XJ. Slow relaxation of Dy(III) single-ion magnets dominated by the simultaneous binding of chelating ligands in low-symmetry ligand-fields. Dalton Trans 2021; 51:1175-1181. [PMID: 34951420 DOI: 10.1039/d1dt03637h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electronic effect and geometry distortion of low-symmetry ligand-field on the anisotropy barrier (Ueff) of spin reversal have been compared in three Dy(III) single-ion magnets through the simultaneous binding of chelating ligands. The substitution of N,O-salicylaldoxime by N,N'-1,10-phenanthroline in the distorted triangular-dodecahedronal field sharply decreases the Ueff by 286 K due to an increase in non-preferred transverse anisotropy, while the geometry distortion with CShM = 1.569 went down to 1.376 only lowering the Ueff by 12 K. The co-coordination strategy of heterodonor ligands highlights the importance of ligand-surroundings on the relaxation dynamics.
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Affiliation(s)
- Hui-Ming Dong
- College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin 300387, People's Republic of China. .,Department of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People's Republic of China.
| | - Zhong-Yi Liu
- College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin 300387, People's Republic of China.
| | - Hui-Min Tang
- College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin 300387, People's Republic of China.
| | - En-Cui Yang
- College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin 300387, People's Republic of China.
| | - Yi-Quan Zhang
- Jiangsu Key Lab for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China.
| | - Xiao-Jun Zhao
- College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin 300387, People's Republic of China. .,Department of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People's Republic of China.
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30
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Hu JJ, Peng Y, Liu SJ, Wen HR. Recent advances in lanthanide coordination polymers and clusters with magnetocaloric effect or single-molecule magnet behavior. Dalton Trans 2021; 50:15473-15487. [PMID: 34668916 DOI: 10.1039/d1dt02797b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molecular magnetorefrigerant materials for low-temperature magnetic refrigeration and single-molecule magnets for high-density information storage and quantum computing have received extensive attention from chemists and magnetic experts. Lanthanide ions with unique magnetic properties have always been considered as ideal candidates for the construction of such materials. This frontier article focuses on GdIII-based molecular magnetorefrigerants and lanthanide-based single-molecule magnets and highlights the most significant advances.
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Affiliation(s)
- Jun-Jie Hu
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China.
| | - Yan Peng
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China.
| | - Sui-Jun Liu
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China.
| | - He-Rui Wen
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China.
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31
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Novikov VV, Nelyubina YV. Modern physical methods for the molecular design of single-molecule magnets. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr5002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Abstract
Many paramagnetic metal complexes have emerged as unique magnetic materials (single-molecule magnets), which behave as conventional magnets at the single-molecule level, thereby making it possible to use them in modern devices for data storage and processing. The rational design of these complexes, however, requires a deep understanding of the physical laws behind a single-molecule magnet behaviour, the mechanisms of magnetic relaxation that determines the magnetic properties and the relationship of these properties with the structure of single-molecule magnets. This review focuses on the physical methods providing such understanding, including different versions and various combinations of magnetometry, electron paramagnetic and nuclear magnetic resonance spectroscopy, optical spectroscopy and X-ray diffraction. Many of these methods are traditionally used to determine the composition and structure of new chemical compounds. However, they are rarely applied to study molecular magnetism.
The bibliography includes 224 references.
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32
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Lai JJ, Ruan ZY, Huang GZ, Liu JL, Tong ML. A high-performance dysprosium(III) single-ion magnet with quasi-Oh symmetry. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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33
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Garlatti E, Chiesa A, Bonfà P, Macaluso E, Onuorah IJ, Parmar VS, Ding YS, Zheng YZ, Giansiracusa MJ, Reta D, Pavarini E, Guidi T, Mills DP, Chilton NF, Winpenny REP, Santini P, Carretta S. A Cost-Effective Semi-Ab Initio Approach to Model Relaxation in Rare-Earth Single-Molecule Magnets. J Phys Chem Lett 2021; 12:8826-8832. [PMID: 34491740 PMCID: PMC8450932 DOI: 10.1021/acs.jpclett.1c02367] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 09/01/2021] [Indexed: 05/30/2023]
Abstract
We discuss a cost-effective approach to understand magnetic relaxation in the new generation of rare-earth single-molecule magnets. It combines ab initio calculations of the crystal field parameters, of the magneto-elastic coupling with local modes, and of the phonon density of states with fitting of only three microscopic parameters. Although much less demanding than a fully ab initio approach, the method gives important physical insights into the origin of the observed relaxation. By applying it to high-anisotropy compounds with very different relaxation, we demonstrate the power of the approach and pinpoint ingredients for improving the performance of single-molecule magnets.
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Affiliation(s)
- Elena Garlatti
- Universitá
di Parma, Dipartimento di
Scienze Matematiche, Fisiche e Informatiche, 43124 Parma, Italy
- UdR
Parma, INSTM, I-43124 Parma, Italy
| | - Alessandro Chiesa
- Universitá
di Parma, Dipartimento di
Scienze Matematiche, Fisiche e Informatiche, 43124 Parma, Italy
- UdR
Parma, INSTM, I-43124 Parma, Italy
| | - Pietro Bonfà
- Universitá
di Parma, Dipartimento di
Scienze Matematiche, Fisiche e Informatiche, 43124 Parma, Italy
| | - Emilio Macaluso
- Universitá
di Parma, Dipartimento di
Scienze Matematiche, Fisiche e Informatiche, 43124 Parma, Italy
- UdR
Parma, INSTM, I-43124 Parma, Italy
| | - Ifeanyi J. Onuorah
- Universitá
di Parma, Dipartimento di
Scienze Matematiche, Fisiche e Informatiche, 43124 Parma, Italy
| | - Vijay S. Parmar
- Department
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - You-Song Ding
- Frontier
Institute of Science and Technology, Xi’an
Jiaotong University, 99 Yanxiang Road, 710054 Xi’an, Shaanxi, China
| | - Yan-Zhen Zheng
- Frontier
Institute of Science and Technology, Xi’an
Jiaotong University, 99 Yanxiang Road, 710054 Xi’an, Shaanxi, China
| | - Marcus J. Giansiracusa
- Department
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Daniel Reta
- Department
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Eva Pavarini
- Institute
for Advanced Simulations, Forschungszentrum
Juelich, 52428 Juelich, Germany
- JARA
High-Performance Computing, RWTH Aachen
University, 52062 Aachen, Germany
| | - Tatiana Guidi
- ISIS
Facility, Rutherford Appleton Laboratory, Didcot OX11 0QX, U.K.
| | - David P. Mills
- Department
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Nicholas F. Chilton
- Department
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Richard E. P. Winpenny
- Department
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Paolo Santini
- Universitá
di Parma, Dipartimento di
Scienze Matematiche, Fisiche e Informatiche, 43124 Parma, Italy
- UdR
Parma, INSTM, I-43124 Parma, Italy
| | - Stefano Carretta
- Universitá
di Parma, Dipartimento di
Scienze Matematiche, Fisiche e Informatiche, 43124 Parma, Italy
- UdR
Parma, INSTM, I-43124 Parma, Italy
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34
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Pavlischuk AV, Pavlischuk VV. Influence of Molecular and Electronic Structure of Ln3+ Complexes on the Occurrence of Monoionic Magnetism: a Review. THEOR EXP CHEM+ 2021. [DOI: 10.1007/s11237-021-09686-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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35
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Benamara N, Diop M, Leuvrey C, Lenertz M, Gilliot P, Gallart M, Bolvin H, Setifi F, Rogez G, Rabu P, Delahaye E. Octahedral Hexachloro Environment of Dy
3+
with Slow Magnetic Relaxation and Luminescent Properties. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Nesrine Benamara
- Institut de Physique et Chimie des Matériaux de Strasbourg – UMR 7504 Université de Strasbourg and CNRS 67034 Strasbourg France
- Laboratoire de Chimie, Ingénierie Moléculaire et Nanostructures Université Ferhat Abbas Sétif 1 Sétif 19000 Algeria
| | - Mayoro Diop
- Institut de Physique et Chimie des Matériaux de Strasbourg – UMR 7504 Université de Strasbourg and CNRS 67034 Strasbourg France
| | - Cédric Leuvrey
- Institut de Physique et Chimie des Matériaux de Strasbourg – UMR 7504 Université de Strasbourg and CNRS 67034 Strasbourg France
| | - Marc Lenertz
- Institut de Physique et Chimie des Matériaux de Strasbourg – UMR 7504 Université de Strasbourg and CNRS 67034 Strasbourg France
| | - Pierre Gilliot
- Institut de Physique et Chimie des Matériaux de Strasbourg – UMR 7504 Université de Strasbourg and CNRS 67034 Strasbourg France
| | - Mathieu Gallart
- Institut de Physique et Chimie des Matériaux de Strasbourg – UMR 7504 Université de Strasbourg and CNRS 67034 Strasbourg France
| | - Hélène Bolvin
- Laboratoire de Chimie et de Physique Quantiques Université de Toulouse and CNRS 31062 Toulouse France
| | - Fatima Setifi
- Laboratoire de Chimie, Ingénierie Moléculaire et Nanostructures Université Ferhat Abbas Sétif 1 Sétif 19000 Algeria
| | - Guillaume Rogez
- Institut de Physique et Chimie des Matériaux de Strasbourg – UMR 7504 Université de Strasbourg and CNRS 67034 Strasbourg France
| | - Pierre Rabu
- Institut de Physique et Chimie des Matériaux de Strasbourg – UMR 7504 Université de Strasbourg and CNRS 67034 Strasbourg France
| | - Emilie Delahaye
- Institut de Physique et Chimie des Matériaux de Strasbourg – UMR 7504 Université de Strasbourg and CNRS 67034 Strasbourg France
- Laboratoire de Chimie de Coordination Université de Toulouse and CNRS 31077 Toulouse France
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36
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Jin P, Yu K, Zhai Y, Luo Q, Wang Y, Zhang X, Lv Y, Zheng Y. Chelating Guanidinates for Dysprosium(
III
)
Single‐Molecule
Magnets
†. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Peng‐Bo Jin
- Xi'an Jiaotong University Shenzhen Research School, Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior for Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Physics and School of Chemistry, Xi'an Jiaotong University 99 Yanxiang Road, Xi'an Shaanxi 710054 China
| | - Ke‐Xin Yu
- Xi'an Jiaotong University Shenzhen Research School, Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior for Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Physics and School of Chemistry, Xi'an Jiaotong University 99 Yanxiang Road, Xi'an Shaanxi 710054 China
| | - Yuan‐Qi Zhai
- Xi'an Jiaotong University Shenzhen Research School, Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior for Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Physics and School of Chemistry, Xi'an Jiaotong University 99 Yanxiang Road, Xi'an Shaanxi 710054 China
| | - Qian‐Cheng Luo
- Xi'an Jiaotong University Shenzhen Research School, Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior for Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Physics and School of Chemistry, Xi'an Jiaotong University 99 Yanxiang Road, Xi'an Shaanxi 710054 China
| | - Yi‐Dian Wang
- Xi'an Jiaotong University Shenzhen Research School, Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior for Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Physics and School of Chemistry, Xi'an Jiaotong University 99 Yanxiang Road, Xi'an Shaanxi 710054 China
| | - Xu‐Feng Zhang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University 277 West Yanta Road, Xi'an Shaanxi 710061 China
| | - Yi Lv
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University 277 West Yanta Road, Xi'an Shaanxi 710061 China
| | - Yan‐Zhen Zheng
- Xi'an Jiaotong University Shenzhen Research School, Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior for Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Physics and School of Chemistry, Xi'an Jiaotong University 99 Yanxiang Road, Xi'an Shaanxi 710054 China
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37
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Kulakova AN, Nigoghossian K, Félix G, Khrustalev VN, Shubina ES, Long J, Guari Y, Carlos LD, Bilyachenko AN, Larionova J. New Magnetic and Luminescent Dy(III) and Dy(III)/Y(III) Based Tetranuclear Silsesquioxane Cages. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100308] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Alena N. Kulakova
- Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilova str., 28 Moscow 119991 Russia
- Peoples' Friendship University of Russia RUDN University) Miklukho-Maklay Str., 6 117198 Moscow Russia
- ICGM Univ. Montpellier CNRS, ENSCM Montpellier France
| | | | - Gautier Félix
- ICGM Univ. Montpellier CNRS, ENSCM Montpellier France
| | - Victor N. Khrustalev
- Peoples' Friendship University of Russia RUDN University) Miklukho-Maklay Str., 6 117198 Moscow Russia
- Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prospect 47 Moscow 119991 Russia
| | - Elena S. Shubina
- Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilova str., 28 Moscow 119991 Russia
| | - Jérôme Long
- ICGM Univ. Montpellier CNRS, ENSCM Montpellier France
| | - Yannick Guari
- ICGM Univ. Montpellier CNRS, ENSCM Montpellier France
| | - Luis D. Carlos
- Phantom-g Physics Department and CICECO – Aveiro Institute of Materials University of Aveiro 3810-193 Aveiro Portugal
| | - Alexey N. Bilyachenko
- Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilova str., 28 Moscow 119991 Russia
- Peoples' Friendship University of Russia RUDN University) Miklukho-Maklay Str., 6 117198 Moscow Russia
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38
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Schlittenhardt S, Moreno-Pineda E, Ruben M. Heteroleptic, polynuclear dysprosium(iii)-carbamato complexes through in situ carbon dioxide capture. Dalton Trans 2021; 50:4735-4742. [PMID: 33734275 DOI: 10.1039/d1dt00063b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amine groups are among the most effective systems for carbon dioxide capture. Reminiscent of the activation of nature's most abundant enzyme RuBisCO, the treatment of amines with CO2 in the presence of oxophilic metal ions, e.g. Mg2+, results in the formation of carbamates. Here we report the synthesis, structure and magnetic properties of three new dysprosium-carbamato complexes. The reaction of gaseous CO2 with N,N-diisopropylamine and DyCl3(DME)2 (DME = Dimethoxyethane) in toluene leads to the formation of the tetrametallic complex [Dy4(O2CNiPr2)10(O-C2H4-OMe)2]. The addition of 2-hydroxy-3-methoxybenzaldehyde-N-methylimine yields the hexametallic compound [Dy6(O2CNiPr2)8(O-C2H4-OMe)2(CO3)2(C9O2NH10)4] in which the metal sites form a chair-like configuration; The same hexanuclear motif is obtained using N,N-dibenzylamine. We show that by employing CO2 as a feedstock, we are able to capture up to 2.5 molecules of CO2 per Dy ion. Magnetic measurements show a decreasing χMT at low temperatures. Combining the experimental magnetic data with ab initio calculations reveils tilting of the easy axes and implies the presence of antiferromagnetic interactions between the Dy(iii) metal ions.
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Affiliation(s)
- Sören Schlittenhardt
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
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39
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Thomas-Hargreaves LR, Giansiracusa MJ, Gregson M, Zanda E, O'Donnell F, Wooles AJ, Chilton NF, Liddle ST. Correlating axial and equatorial ligand field effects to the single-molecule magnet performances of a family of dysprosium bis-methanediide complexes. Chem Sci 2021; 12:3911-3920. [PMID: 34163660 PMCID: PMC8179472 DOI: 10.1039/d1sc00238d] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 03/01/2021] [Indexed: 11/21/2022] Open
Abstract
Treatment of the new methanediide-methanide complex [Dy(SCS)(SCSH)(THF)] (1Dy, SCS = {C(PPh2S)2}2-) with alkali metal alkyls and auxillary ethers produces the bis-methanediide complexes [Dy(SCS)2][Dy(SCS)2(K(DME)2)2] (2Dy), [Dy(SCS)2][Na(DME)3] (3Dy) and [Dy(SCS)2][K(2,2,2-cryptand)] (4Dy). For further comparisons, the bis-methanediide complex [Dy(NCN)2][K(DB18C6)(THF)(toluene)] (5Dy, NCN = {C(PPh2NSiMe3)2}2-, DB18C6 = dibenzo-18-crown-6 ether) was prepared. Magnetic susceptibility experiments reveal slow relaxation of the magnetisation for 2Dy-5Dy, with open magnetic hysteresis up to 14, 12, 15, and 12 K, respectively (∼14 Oe s-1). Fitting the alternating current magnetic susceptibility data for 2Dy-5Dy gives energy barriers to magnetic relaxation (U eff) of 1069(129)/1160(21), 1015(32), 1109(70), and 757(39) K, respectively, thus 2Dy-4Dy join a privileged group of SMMs with U eff values of ∼1000 K and greater with magnetic hysteresis at temperatures >10 K. These structurally similar Dy-components permit systematic correlation of the effects of axial and equatorial ligand fields on single-molecule magnet performance. For 2Dy-4Dy, the Dy-components can be grouped into 2Dy-cation/4Dy and 2Dy-anion/3Dy, where the former have almost linear C[double bond, length as m-dash]Dy[double bond, length as m-dash]C units with short average Dy[double bond, length as m-dash]C distances, and the latter have more bent C[double bond, length as m-dash]Dy[double bond, length as m-dash]C units with longer average Dy[double bond, length as m-dash]C bonds. Both U eff and hysteresis temperature are superior for the former pair compared to the latter pair as predicted, supporting the hypothesis that a more linear axial ligand field with shorter M-L distances produces enhanced SMM properties. Comparison with 5Dy demonstrates unusually clear-cut examples of: (i) weakening the equatorial ligand field results in enhancement of the SMM performance of a monometallic system; (ii) a positive correlation between U eff barrier and axial linearity in structurally comparable systems.
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Affiliation(s)
| | - Marcus J Giansiracusa
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Matthew Gregson
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Emanuele Zanda
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Felix O'Donnell
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Ashley J Wooles
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Nicholas F Chilton
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Stephen T Liddle
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
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40
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A Mixed Valence Co IICo III2 Field-Supported Single Molecule Magnet: Solvent-Dependent Structural Variation. Molecules 2021; 26:molecules26041060. [PMID: 33670480 PMCID: PMC7922140 DOI: 10.3390/molecules26041060] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 02/10/2021] [Accepted: 02/14/2021] [Indexed: 11/25/2022] Open
Abstract
One-pot reaction of the Schiff base N,N’-ethylene bis(salicylaldimine) (H2L), CoCl2.6H2O, and [Ph2SnCl2] in acetone produces the mixed valence CoIICoIII2 compound [CoIICoIII2(μ-L)2(Ph)2(μ-Cl)2]·(CH3)2CO·H2O (1). Our recent study already revealed that the same reaction mixtures in methanol or ethanol produced a heterometallic SnIVCoIII (2) or monometallic CoIII complex (3), respectively. Comparison of these organometallic systems shows that the 2,1-intermetallic Ph shift occurs in any of those solvents, but their relevant structural features (mononuclear, dinuclear-heterometallic, and trinuclear mixed valence) are solvent dependent. Geometrical structural rotation is also discussed among the related organometallic CoIICoIII2 systems. The AC magnetic susceptibility measurements indicate that 1 is a single molecule magnet (SMM), exhibiting a field-induced slow magnetic relaxation with two modes. The relaxation time for the low-frequency channel is as slow as τ~0.6 s at T = 2.0 K and BDC = 1.0 T.
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41
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Moutet J, Schleinitz J, La Droitte L, Tricoire M, Pointillart F, Gendron F, Simler T, Clavaguéra C, Le Guennic B, Cador O, Nocton G. Bis‐Cyclooctatetraenyl Thulium(II): Highly Reducing Lanthanide Sandwich Single‐Molecule Magnets. Angew Chem Int Ed Engl 2021; 60:6042-6046. [DOI: 10.1002/anie.202015428] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Jules Moutet
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Jules Schleinitz
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Léo La Droitte
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Maxime Tricoire
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Fabrice Pointillart
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Frédéric Gendron
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Thomas Simler
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Carine Clavaguéra
- Université Paris-Saclay CNRS Institut de Chimie Physique UMR 8000 91405 Orsay cedex 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
| | - Grégory Nocton
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
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42
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Moutet J, Schleinitz J, La Droitte L, Tricoire M, Pointillart F, Gendron F, Simler T, Clavaguéra C, Le Guennic B, Cador O, Nocton G. Bis‐Cyclooctatetraenyl Thulium(II): Highly Reducing Lanthanide Sandwich Single‐Molecule Magnets. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015428] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jules Moutet
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Jules Schleinitz
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Léo La Droitte
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Maxime Tricoire
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Fabrice Pointillart
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Frédéric Gendron
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Thomas Simler
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Carine Clavaguéra
- Université Paris-Saclay CNRS Institut de Chimie Physique UMR 8000 91405 Orsay cedex 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
| | - Grégory Nocton
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
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43
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Wang J, Li Q, Wu S, Chen Y, Wan R, Huang G, Liu Y, Liu J, Reta D, Giansiracusa MJ, Wang Z, Chilton NF, Tong M. Opening Magnetic Hysteresis by Axial Ferromagnetic Coupling: From Mono‐Decker to Double‐Decker Metallacrown. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014993] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Jin Wang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Quan‐Wen Li
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Si‐Guo Wu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Yan‐Cong Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Rui‐Chen Wan
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Guo‐Zhang Huang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Yang Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Jun‐Liang Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Daniel Reta
- Department of Chemistry The University of Manchester Oxford Road Manchester M13 9PL UK
| | | | - Zhen‐Xing Wang
- Wuhan National High Magnetic Center Huazhong University of Science and Technology Wuhan 430074 P. R. China
| | - Nicholas F. Chilton
- Department of Chemistry The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Ming‐Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
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44
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Wang J, Li QW, Wu SG, Chen YC, Wan RC, Huang GZ, Liu Y, Liu JL, Reta D, Giansiracusa MJ, Wang ZX, Chilton NF, Tong ML. Opening Magnetic Hysteresis by Axial Ferromagnetic Coupling: From Mono-Decker to Double-Decker Metallacrown. Angew Chem Int Ed Engl 2021; 60:5299-5306. [PMID: 33216437 DOI: 10.1002/anie.202014993] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Indexed: 02/03/2023]
Abstract
Combining Ising-type magnetic anisotropy with collinear magnetic interactions in single-molecule magnets (SMMs) is a significant synthetic challenge. Herein we report a Dy[15-MCCu -5] (1-Dy) SMM, where a DyIII ion is held in a central pseudo-D5h pocket of a rigid and planar Cu5 metallacrown (MC). Linking two Dy[15-MCCu -5] units with a single hydroxide bridge yields the double-decker {Dy[15-MCCu -5]}2 (2-Dy) SMM where the anisotropy axes of the two DyIII ions are nearly collinear, resulting in magnetic relaxation times for 2-Dy that are approximately 200 000 times slower at 2 K than for 1-Dy in zero external field. Whereas 1-Dy and the YIII -diluted Dy@2-Y analogue do not show remanence in magnetic hysteresis experiments, the hysteresis data for 2-Dy remain open up to 6 K without a sudden drop at zero field. In conjunction with theoretical calculations, these results demonstrate that the axial ferromagnetic Dy-Dy coupling suppresses fast quantum tunneling of magnetization (QTM). The relaxation profiles of both complexes curiously exhibit three distinct exponential regimes, and hold the largest effective energy barriers for any reported d-f SMMs up to 625 cm-1 .
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Affiliation(s)
- Jin Wang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Quan-Wen Li
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Si-Guo Wu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Yan-Cong Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Rui-Chen Wan
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Guo-Zhang Huang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Yang Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Jun-Liang Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Daniel Reta
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Marcus J Giansiracusa
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Zhen-Xing Wang
- Wuhan National High Magnetic Center, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Nicholas F Chilton
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Ming-Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
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45
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Wu H, Li M, Xia Z, Montigaud V, Cador O, Le Guennic B, Ke H, Wang W, Xie G, Chen S, Gao S. High temperature quantum tunnelling of magnetization and thousand kelvin anisotropy barrier in a Dy 2 single-molecule magnet. Chem Commun (Camb) 2021; 57:371-374. [PMID: 33325464 DOI: 10.1039/d0cc06993k] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We report here a dinuclear DyIII iodine-bridged single-molecule magnet self-assembled by cis/trans coordination chemistry that displays a large anisotropy barrier of ca. 1300 K and a hysteresis opening temperature of 16 K. High temperature quantum tunnelling of magnetization is observed up to 56 K in zero-field and explained by the combination of the large anisotropy barrier and the local transverse field at the trans site. The results provide a model for thorough understanding of the effect of electronic structure on the magnetic behavior of lanthanide complexes.
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Affiliation(s)
- Haipeng Wu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, China.
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46
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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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47
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Ma S, Zhang T, Zhao JP, Liu ZY, Liu FC. A magnetic site dilution approach to achieve bifunctional fluorescent thermometers and single-ion magnets. Dalton Trans 2021; 50:1307-1312. [PMID: 33399151 DOI: 10.1039/d0dt04058d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In complex [Na-Dy(μ2-L)4]n(HL = 8-hydroxyquinoline) (1), the DyL4 units were linked by the NaI ions to form one-dimensional chains. The chain exhibited slow magnetic relaxation behavior at low temperature, accompanied by obvious quantum tunneling of magnetization (QTM). Very weak fluorescence was detected in 1 due to the mismatch of the state energy between DyIII and the L ligand. Through the magnetic dilution of diamagnetic YIII ions, complex [NaDy0.02Y0.98(μ2-L)4]n (2) was obtained; in 2 the QTM of DyIII was suppressed and the single ion magnet (SIM) behavior was enhanced. More interestingly, the fluorescence emission of 8-hydroxyquinoline was lightened by the YIII ions in 2, whose intensity is linearly correlated with the temperature variation. The examples of dual functional fluorescent thermometers and SIM materials are attained simply by ion dilution, achieving the effect of killing two birds with one stone.
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Affiliation(s)
- Shuai Ma
- School of Chemistry and Chemical Engineering, Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin, China 300384.
| | - Ting Zhang
- School of Chemistry and Chemical Engineering, Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin, China 300384.
| | - Jiong-Peng Zhao
- School of Chemistry and Chemical Engineering, Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin, China 300384.
| | - Zhong-Yi Liu
- College of Chemistry, Key Laboratory of inorganic-organic hybrid Functional Material Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Fu-Chen Liu
- School of Chemistry and Chemical Engineering, Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin, China 300384.
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48
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Thomas-Hargreaves LR, Hunger D, Kern M, Wooles AJ, van Slageren J, Chilton NF, Liddle ST. Insights into D4h@metal-symmetry single-molecule magnetism: the case of a dysprosium-bis(boryloxide) complex. Chem Commun (Camb) 2021; 57:733-736. [DOI: 10.1039/d0cc07446b] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We report a D4h@Dy single-molecule magnet (SMM) with a Ueff energy barrier of 1565 K, one of the highest energy barriers for any 6-coordinate lanthanide SMM.
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Affiliation(s)
| | - David Hunger
- Institute of Physical Chemistry
- University of Stuttgart
- Stuttgart
- Germany
| | - Michal Kern
- Institute of Physical Chemistry
- University of Stuttgart
- Stuttgart
- Germany
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49
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Zhang C, Liu M, Cai X, Chen L, Liu YZ, Cui H, Zhang SL, Yuan A. Observation of field-induced single-ion magnet behavior in an octahedral dysprosium complex with a strong ligand field. NEW J CHEM 2021. [DOI: 10.1039/d0nj05398h] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mononuclear six-coordinate DyIII complex exhibiting slow magnetic relaxation provides a rare case for octahedral lanthanide complexes with SMM behavior.
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Affiliation(s)
- Chunyang Zhang
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Mengyao Liu
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Xingwei Cai
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Lei Chen
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Yuan-Zhong Liu
- Suzhou Institute of Biomedical Engineering and Technology
- Chinese Academy of Sciences
- Suzhou 215163
- P. R. China
- Jinan Guoke Medical Technology Development Co., Ltd
| | - Huihui Cui
- School of Chemistry and Chemical Engineering
- Nantong University
- Jiangsu 226019
- P. R. China
| | - Shao-Liang Zhang
- Institution of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering, Liaocheng University
- Liaocheng 252059
- P. R. China
| | - Aihua Yuan
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
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50
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Long J, Tolpygin AO, Mamontova E, Lyssenko KA, Liu D, Albaqami MD, Chibotaru LF, Guari Y, Larionova J, Trifonov AA. An unusual mechanism of building up of a high magnetization blocking barrier in an octahedral alkoxide Dy3+-based single-molecule magnet. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01267j] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We report a new octahedral luminescent SMM exhibiting massive crystal-field splitting and an anisotropic barrier of 1385 cm−1.
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Affiliation(s)
| | - Aleksei O. Tolpygin
- Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russia
- Institute of Organoelement Compounds of Russian Academy of Sciences
- Moscow
| | | | - Konstantin A. Lyssenko
- Institute of Organoelement Compounds of Russian Academy of Sciences
- Moscow
- Russia
- Dept. Chem
- Moscow 119991
| | - Dan Liu
- Institute of Flexible Electronics (IFE)
- Northwestern Polytechnical University (NPU)
- Shaanxi
- China
| | | | - Liviu F. Chibotaru
- Theory of Nanomaterials Group and INPAC
- Katholieke Universiteit Leuven
- Heverlee
- Belgium
| | | | | | - Alexander A. Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russia
- Institute of Organoelement Compounds of Russian Academy of Sciences
- Moscow
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