1
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Kalita P, Kumari K, Kumar P, Kumar V, Singh SK, Rogez G, Chandrasekhar V. Eight-coordinate mono- and dinuclear Dy(III) complexes containing a rigid equatorial plane and an anisobidentate carboxylate ligand in the axial position: synthesis, structure and magnetism. Dalton Trans 2024; 53:10521-10535. [PMID: 38842042 DOI: 10.1039/d4dt00803k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
A rigid pentadentate chelating ligand (H2L) has been utilized to synthesize a series of octacoordinate mononuclear complexes, [Dy(L)(Ph3PO)(OOCR)] (where R = C6H5 (1), C(CH3)3 (2), CF3 (3)) and a dinuclear complex, [Dy2(L)2(Ph3PO)2{(OOC)2C6H4}] (4) based on the highly anisotropic Dy(III) ion. All the complexes were structurally characterized by single-crystal X-ray diffraction studies. The complexes were formed by the coordination action of the dianionic pentadentate ligand [L]2-, one phosphine oxide, and carboxylate ligands. DC and AC magnetic measurements were performed on 1-4. Complexes 1-4 show SMM behaviour, under zero DC field for 1 and 4, and under 500 Oe and 1000 Oe DC fields for 2 and 3 respectively, with thermally activated, Raman, and Raman and quantum tunnelling dominant relaxation mechanisms for 1 and 2, 3 and 4, respectively.
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Affiliation(s)
- Pankaj Kalita
- Department of Chemistry, Nowgong Girls' College, Nagaon, Assam-782 002, India.
| | - Kusum Kumari
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana-502 285, India.
| | - Pawan Kumar
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500 107, India.
| | - Vierandra Kumar
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500 107, India.
| | - Saurabh Kumar Singh
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana-502 285, India.
| | - Guillaume Rogez
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) CNRS/Université de Strasbourg, UMR 7504, 67000 Strasbourg, France.
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2
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Moorthy S, Tarannum I, Kumari K, Singh SK. A highly anisotropic family of hexagonal bipyramidal Dy(III) unsaturated 18-crown-6 complexes exceeding the blockade barrier over 2700 K: a computational exploration. Dalton Trans 2024. [PMID: 38787652 DOI: 10.1039/d4dt00632a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2024]
Abstract
In the present work, we have explored a series of unsaturated hexa-18-crown-6 (U18C6) ligands towards designing highly anisotropic Dy(III) based single-ion magnets (SIMs) with the general formula [Dy(U18C6)X2]+ (where U18C6 = [C12H12O6] (1), [C12H12S6] (2), [C12H12Se6] (3), [C12H12O4S2] (4), [C12H12O4Se2] (5) and X = F, Cl, Br, I, OtBu and OSiPh3). By analysing the electronic structure, bonding and magnetic properties, we find that the U18C6 ligands prefer stabilising the highly symmetric eight-coordinated hexagonal bipyramidal geometry (HBPY-8), which is the source of the near-Ising type anisotropy in all the [Dy(U18C6)X2]+ complexes. Moreover, the ability of sulfur/selenium substituted U18C6 ligands to stabilize the highly anisotropic HBPY-8 geometry makes them more promising towards engineering the equatorial ligand field compared to substituted saturated 18C6 ligands where the exodentate arrangement of the S lone pairs results in low symmetry. Magnetic relaxation analysis predicts a record barrier height over 2700 K for [Dy(C12H12O6)F2]+ and [Dy(C12H12S6)X2]+ (where X = F, OtBu and OSiPh3) complexes, nearly 23% higher than those of the top performing Dy(III) based SIMs in the literature.
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Affiliation(s)
- Shruti Moorthy
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy, Telangana, 502284, India.
| | - Ibtesham Tarannum
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy, Telangana, 502284, India.
| | - Kusum Kumari
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy, Telangana, 502284, India.
| | - Saurabh Kumar Singh
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy, Telangana, 502284, India.
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3
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Borah A, Dey S, Siddiqui K, Gupta SK, Rajaraman G, Murugavel R. Magnetic anisotropy in octahedral Dy(III) and Yb(III) complexes. Dalton Trans 2024; 53:7263-7267. [PMID: 38618749 DOI: 10.1039/d3dt04352e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
New organophosphate complexes [Ln(dippH)3(dippH2)3]·(H2O)6, (Ln = Dy, Yb and Y; dippH2 = 2,6-diisopropylphenyl phosphate), displaying octahedral coordination geometry around the metal ion, exhibit unusual slow relaxation of magnetisation, which is investigated through experimental studies and ab initio CASSCF calculations.
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Affiliation(s)
- Aditya Borah
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, 400076, India.
- Department of Chemistry, Jengraimukh College, Majuli, Assam, 785105, India
| | - Sourav Dey
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, 400076, India.
| | - Kehkasha Siddiqui
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, 400076, India.
| | - Sandeep K Gupta
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, Delhi, 110016, India
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, 400076, India.
| | - Ramaswamy Murugavel
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, 400076, India.
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4
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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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5
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Gil Y, de Santana RC, Vega A, Aravena D, Spodine E. Influence of symmetry on the magneto-optical properties of a bifunctional macrocyclic Dy III complex. Dalton Trans 2023. [PMID: 38014706 DOI: 10.1039/d3dt03042c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
In this work, a novel complex, [Dy(LPr)(NO3)2]·(H2O)·(NO3) (1), containing a highly distorted macrocyclic ligand (LPr) and weak axial anions (NO3-), was synthesized and characterized. Even though this coordination environment is not ideal for maximizing the magnetic anisotropy of a DyIII ion, a magneto-structural analysis reveals that the high distortion of the macrocycle promotes a disposition of the hard plane and easy axis opposite to the expected one. This results in a quite symmetrical environment which allows obtaining a field induced SMM behaviour. The magnetic relaxation properties of this complex were rationalized with the aid of ab initio multireference calculations. Moreover, 1 showed the characteristic emission bands of DyIII ion, indicating that the macrocyclic ligand acts as an efficient sensitizer in the energy transfer process to the emissive state of the DyIII ion. Due to the symmetric environment of 1, the Y/B intensity ratio (0.61) results in CIE coordinates (0.278; 0.314), close to those of the white light region. To gain further insight into the mechanism leading to the luminescence properties, ab initio calculations were performed to elucidate the key factors controlling the Y/B intensity ratio in this bifunctional complex.
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Affiliation(s)
- Yolimar Gil
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Olivos 1007, 8380544, Santiago, Chile.
| | - Ricardo Costa de Santana
- Instituto de Física, Universidade Federal de Goiás, Campus Samambaia, 74690-900, Goiânia (GO), Brazil
| | - Andrés Vega
- Departamento de Ciencias Químicas, Universidad Andrés Bello, Santiago, Chile
| | - Daniel Aravena
- Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40, Correo 33, Santiago, Chile.
| | - Evgenia Spodine
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Olivos 1007, 8380544, Santiago, Chile.
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6
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Dong XT, Yu MQ, Peng YB, Zhou GX, Peng G, Ren XM. Single molecule magnet features in luminescent lanthanide coordination polymers with heptacoordinate Dy/Yb(III) ions as nodes. Dalton Trans 2023; 52:12686-12694. [PMID: 37609766 DOI: 10.1039/d3dt02106h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Two sets of 1D/2D lanthanide coordination polymers with formulas of Ln(oqa)3·2H2O [Hoqa = 2-(4-oxoquinolin-1(4H)-yl) acetic acid, Ln = Dy (1), Yb (2)] and Ln(oaa)2(HCOO)(H2O) [Hoaa = 2-(9-oxoacridin-10(9H)-yl) acetic acid, Ln = Dy (3), Yb (4)] have been synthesized and their physical properties were investigated. All four complexes are constructed from seven-coordinate lanthanide ions and corresponding organic linkers. The lanthanide ions in 1 and 2 adopt a pentagonal bipyramid coordination geometry, whereas the coordination geometry of lanthanide ions in 3 and 4 can be described as a capped octahedron. Slow magnetic relaxation behaviors were observed in these four products at a zero/non-zero static magnetic field. Complexes 1, 2 and 4 exhibit the characteristic emission of Ln(III) ions, whereas complex 3 shows ligand-based emission. Bright yellow light emission was also observed when a voltage was applied, demonstrating the potential of 1 for application in light-emitting diodes (LEDs). Compounds 3 and 4 are the first examples of lanthanide complexes based on Hoaa ligands.
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Affiliation(s)
- Xiang-Tao Dong
- State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Meng-Qing Yu
- State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Yong-Bo Peng
- State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Guo-Xing Zhou
- State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Guo Peng
- State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Xiao-Ming Ren
- State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China.
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7
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Liu D, Guo X, Zhang X, Al-Kahtani AA, Chibotaru LF. Single-ion magnet behavior of Ln 3+ encapsulated in carbon nanotubes: an ab initio insight. Dalton Trans 2023; 52:11243-11253. [PMID: 37526195 DOI: 10.1039/d3dt01233f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Single-molecule magnets (SMMs) have attracted large interest owing to their capability to store information at the level of a single molecule, which has great potential for applications in information technology. The key characteristic required for SMM performance is the magnetization blocking barrier, and in the last decade, impressive efforts have been made to increase its height. Herein, we report an ab initio investigation of the SMM behavior of a series of lanthanide ions (Tb3+, Dy3+, Ho3+, Er3+, Tm3+ and Yb3+) encapsulated in zigzag carbon nanotubes (CNTs) of different diameters. The results show that despite the high symmetry of the Ln environment, none of the investigated systems, except for Er3+ encapsulated in the (7,0) CNT, exhibited any blocking behavior. This is mainly attributed to the strong competition between axial and equatorial contributions to the crystal field of these encapsulated ions, resulting in weak or lack of magnetic axiality. The presented results provide useful theoretical guidance for the design of high-performance SMMs via modulating the crystal field of the ligand environment.
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Affiliation(s)
- Dan Liu
- Institute of Flexible Electronics, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072 Shaanxi, China.
| | - Xuefeng Guo
- Institute of Flexible Electronics, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072 Shaanxi, China.
| | - Xiaoyong Zhang
- Institute of Systems and Physical Biology, Shenzhen Bay Laboratory, Shenzhen 518055, 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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8
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Sodisetti VR, Lemmerer A, Wamwangi D, Bhattacharyya S. Observation of High Magnetic Bistability in Lanthanide (Ln = Gd, Tb and Dy)-Grafted Carbon Nanotube Hybrid Molecular System. Int J Mol Sci 2023; 24:12303. [PMID: 37569684 PMCID: PMC10418393 DOI: 10.3390/ijms241512303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023] Open
Abstract
There is an immense research interest in molecular hybrid materials posing novel magnetic properties for usage in spintronic devices and quantum technological applications. Although grafting magnetic molecules onto carbon nanotubes (CNTs) is nontrivial, there is a need to explore their single molecule magnetic (SMM) properties post-grafting to a greater degree. Here, we report a one-step chemical approach for lanthanide-EDTA (Ln = GdIII, 1; TbIII, 2 and DyIII, 3) chelate synthesis and their effective grafting onto MWCNT surfaces with high magnetic bistability retention. The magnetic anisotropy of an Ln-CNT hybrid molecular system by replacing the central ions in the hybrid complex was studied and it was found that system 1 exhibited a magnetization reversal from positive to negative values at 70 K with quasi-anti-ferromagnetic ordering, 2 showed diamagnetism to quasi-ferromagnetism and 3 displayed anti-ferromagnetic ordering as the temperature was lowered at an applied field of 200 Oe. A further analysis of magnetization (M) vs. field (H) revealed 1 displaying superparamagnetic behavior, and 2 and 3 displaying smooth hysteresis loops with zero-field slow magnetic relaxation. The present work highlights the importance of the selection of lanthanide ions in designing SMM-CNT hybrid molecular systems with multi-functionalities for building spin valves, molecular transistors, switches, etc.
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Affiliation(s)
- Venkateswara Rao Sodisetti
- Nano-Scale Transport Physics Laboratory, School of Physics, University of the Witwatersrand (Wits), Johannesburg 2050, South Africa;
| | - Andreas Lemmerer
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand (Wits), Johannesburg 2050, South Africa;
| | - Daniel Wamwangi
- DSI-NRF Centre of Excellence in Strong Materials and School of Physics, University of the Witwatersrand (Wits), Johannesburg 2050, South Africa;
| | - Somnath Bhattacharyya
- Nano-Scale Transport Physics Laboratory, School of Physics, University of the Witwatersrand (Wits), Johannesburg 2050, South Africa;
- DSI-NRF Centre of Excellence in Strong Materials and School of Physics, University of the Witwatersrand (Wits), Johannesburg 2050, South Africa;
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9
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Yang K, Sun R, Zhao J, Deng C, Wang B, Gao S, Huang W. A Combined Synthetic, Magnetic, and Theoretical Study on Enhancing Ligand-Field Axiality for Dy(III) Single-Molecule Magnets Supported by Ferrocene Diamide Ligands. Inorg Chem 2023. [PMID: 37311100 DOI: 10.1021/acs.inorgchem.3c00896] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Molecular design is crucial for improving the performance of single-molecule magnets (SMMs). For dysprosium(III) SMMs, enhancing ligand-field axiality is a well-suited strategy to achieve high-performance SMMs. We synthesized a series of dysprosium(III) complexes, (NNTIPS)DyBr(THF)2 (1, NNTIPS = fc(NSiiPr3)2; fc = 1,1'-ferrocenediyl, THF = tetrahydrofuran), [(NNTIPS)Dy(THF)3][BPh4] (2), (NNTIPS)DyI(THF)2 (3), and [(NNTBS)Dy(THF)3][BPh4] (4, NNTBS = fc(NSitBuMe2)2), supported by ferrocene diamide ligands. X-ray crystallography shows that the rigid ferrocene backbone enforces a nearly axial ligand field with weakly coordinating equatorial ligands. Dysprosium(III) complexes 1-4 all exhibit slow magnetic relaxation under zero fields and possess high effective barriers (Ueff) around 1000 K, comparable to previously reported (NNTBS)DyI(THF)2 (5). We probed the influences of structural variations on SMM behaviors by theoretical calculations and found that the distribution of negative charges defined by rq, i.e., the ratio of the charges on the axial ligands to the charges on the equatorial ligands, plays a decisive role. Moreover, theoretical calculations on a series of model complexes 1'-5' without equatorial ligands unveil that the axial crystal-field parameters B20 are directly proportional to the N-Dy-N angles and support the hypothesis that enhancing the ligand-field axiality could improve SMM performance.
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Affiliation(s)
- Kexin Yang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Rong Sun
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Jingliang Zhao
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Chong Deng
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Bingwu Wang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Song Gao
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
- Spin-X Institute, School of Chemistry and Chemical Engineering, State Key Laboratory of Luminescent Materials and Devices, Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials, South China University of Technology, Guangzhou 510641, P. R. China
| | - Wenliang Huang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
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Swain A, Sharma T, Rajaraman G. Strategies to quench quantum tunneling of magnetization in lanthanide single molecule magnets. Chem Commun (Camb) 2023; 59:3206-3228. [PMID: 36789911 DOI: 10.1039/d2cc06041h] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Enhancing blocking temperature (TB) is one of the holy grails in Single Molecule Magnets(SMMs), as any future potential application in this class of molecules is directly correlated to this parameter. Among many factors contributing to a reduction of TB value, Quantum Tunnelling of Magnetisation (QTM), a phenomenon that is a curse or a blessing based on the application sought after, tops the list. Theoretical tools based on density functional and ab initio CASSCF/RASSI-SO methods have played a prominent role in estimating various spin Hamiltonian parameters and establishing the mechanism of magnetization relaxation in this class of molecules. Particularly, various strategies to quench QTM effects go hand-in-hand with experiments, and different methods proposed to quell QTM effects are scattered in the literature. In this perspective, we have explored various approaches that are proposed in the literature to quench QTM effects, and these include the role of (i) local symmetry of lanthanides, (ii) super-exchange interaction in {3d-4f} complexes, (iii) direct-exchange interaction in {radical-4f} and metal-metal bonded complexes to suppress the QTM, (iv) utilizing external stimuli such as an electric field or pressure to modulate the QTM and (v) avoiding QTM effects by stabilising toroidal states in 4f and {3d-4f} clusters. We believe the strategies summarized here will help to design new-generation SMMs.
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Affiliation(s)
- Abinash Swain
- Department of Chemistry, IIT Bombay, Powai, Mumbai - 400076, India.
| | - Tanu Sharma
- Department of Chemistry, IIT Bombay, Powai, Mumbai - 400076, India.
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11
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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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12
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Georgiev M, Chamati H. Single-Ion Magnets with Giant Magnetic Anisotropy and Zero-Field Splitting. ACS OMEGA 2022; 7:42664-42673. [PMID: 36467950 PMCID: PMC9713882 DOI: 10.1021/acsomega.2c06119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 11/02/2022] [Indexed: 06/17/2023]
Abstract
The design of mononuclear molecular nanomagnets exhibiting a huge energy barrier to the reversal of magnetization have seen a surge of interest during the last few decades due to their potential technological applications. More specifically, single-ion magnets are peculiarly attractive by virtue of their rich quantum behavior and distinct fine structure. These are viable candidates for implementation as single-molecule high-density information storage devices and other applications in future quantum technologies. The present review presents the comprehensive state of the art in the topic of single-ion magnets possessing an eminent magnetization-reversal barrier, very slow magnetic relaxation and high blocking temperature. We turn our attention to the achievements in the synthesis of 3d and 4f single-ion magnets during the last two decades and discuss the observed magnetostructural properties underlying the anisotropy behavior and the ensuing remanence. Furthermore, we highlight the fundamental theoretical aspects to shed light on the complex behavior of these nanosized magnetic entities. In particular, we focus on key notions, such as zero-field splitting, anisotropy energy and quantum tunneling of the magnetization and their interdependence.
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13
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Li HQ, Wang GL, Sun YC, Zhang YQ, Wang XY. Solvent Modification of the Structures and Magnetic Properties of a Series of Dysprosium(III) Single-Molecule Magnets. Inorg Chem 2022; 61:17537-17549. [DOI: 10.1021/acs.inorgchem.2c02513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hong-Qing Li
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Guo-Lu Wang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing210023, China
| | - Yu-Chen Sun
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing210023, China
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
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Lunghi A, Sanvito S. Computational design of magnetic molecules and their environment using quantum chemistry, machine learning and multiscale simulations. Nat Rev Chem 2022; 6:761-781. [PMID: 37118096 DOI: 10.1038/s41570-022-00424-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/15/2022] [Indexed: 11/09/2022]
Abstract
Having served as a playground for fundamental studies on the physics of d and f electrons for almost a century, magnetic molecules are now becoming increasingly important for technological applications, such as magnetic resonance, data storage, spintronics and quantum information. All of these applications require the preservation and control of spins in time, an ability hampered by the interaction with the environment, namely with other spins, conduction electrons, molecular vibrations and electromagnetic fields. Thus, the design of a novel magnetic molecule with tailored properties is a formidable task, which does not only concern its electronic structures but also calls for a deep understanding of the interaction among all the degrees of freedom at play. This Review describes how state-of-the-art ab initio computational methods, combined with data-driven approaches to materials modelling, can be integrated into a fully multiscale strategy capable of defining design rules for magnetic molecules.
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15
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Long J, Selikhov AN, Cherkasov AV, Nelyubina YV, Salles F, Guari Y, Larionova J, Trifonov AA. Base‐Free Alkoxide Dysprosium(III) Complexes with an Unusual Tetraphenylborate Coordination: Study of the Slow Relaxation of the Magnetization. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jérôme Long
- ICGM Univ. Montpellier CNRS ENSCM Montpellier France
- Institut Universitaire de France (IUF) 1 rue Descartes 75231 Paris Cedex 05 France
| | - Alexander N. Selikhov
- Institute of Organometallic Chemistry of Russian Academy of Sciences 49 Tropinina str., GSP-445 630950 Nizhny Novgorod Russia
- Institute of Organoelement Compounds of Russian Academy of Sciences 28 Vavilova str. 119334 Moscow Russia
| | - Anton V. Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences 49 Tropinina str., GSP-445 630950 Nizhny Novgorod Russia
| | - Yulia V. Nelyubina
- Institute of Organoelement Compounds of Russian Academy of Sciences 28 Vavilova str. 119334 Moscow Russia
| | | | - Yannick Guari
- ICGM Univ. Montpellier CNRS ENSCM Montpellier France
| | | | - Alexander A. Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Sciences 49 Tropinina str., GSP-445 630950 Nizhny Novgorod Russia
- Institute of Organoelement Compounds of Russian Academy of Sciences 28 Vavilova str. 119334 Moscow Russia
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16
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Sheng Y, Jiang YJ, Cheng ZH, Liu RC, Ge JY, Gao F. Syntheses, structures, and magnetic properties of acetate-bridged lanthanide complexes based on a tripodal oxygen ligand. Front Chem 2022; 10:1021358. [PMID: 36199666 PMCID: PMC9527289 DOI: 10.3389/fchem.2022.1021358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 09/05/2022] [Indexed: 11/13/2022] Open
Abstract
Four homodinuclear lanthanide complexes, Dy2 (LOEt)2(OAc)4 (1), Tb2 (LOEt)2(OAc)4 (2), Ho2(LOEt)2(OAc)4 (3), and Gd2 (LOEt)2(OAc)4 (4), have been synthesized and characterized based on a tripodal oxygen ligand Na [(η5-C5H5)Co(P(O)(OC2H5)2)3] (NaLOEt). Structural analyses show that the acetate anions bridge two symmetry-related Ln3+ ions in the μ2:η1:η1 and μ2:η1:η2 coordination patterns, and each lanthanide (III) ion owns a twisted square antiprism (SAPR) conformation. Static magnetic measurements reveal the weak intramolecular ferromagnetic interaction between dysprosium (III) ions in 1 and antiferromagnetic Ln3+···Ln3+ couplings in the other three complexes. Through the analysis of the ligand-field effect and magnetic anisotropy axis orientation, the reasons for the lack of dynamic magnetic behavior in 1 were identified.
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Affiliation(s)
- Yu Sheng
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, China
| | - Yu-Jing Jiang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, China
| | - Zi-Hang Cheng
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, China
| | - Ru-Chan Liu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, China
| | - Jing-Yuan Ge
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
- *Correspondence: Feng Gao, ; Jing-Yuan Ge,
| | - Feng Gao
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, China
- *Correspondence: Feng Gao, ; Jing-Yuan Ge,
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17
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Zeng M, Zhou ZY, Wu XR, Liu CM, Kou HZ. Assembly of a Heterotrimetallic Zn 2Dy 2Ir Pentanuclear Complex toward Multifunctional Molecular Materials. Inorg Chem 2022; 61:14275-14281. [PMID: 36031796 DOI: 10.1021/acs.inorgchem.2c01822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Rational selection of metal ions and organic ligands to synthesize metal-organic complexes (MOCs) is necessary for constructing multifunctional materials. Herein, we have obtained a novel heterotrimetallic Zn2Dy2Ir pentanuclear MOC by the assembly of DyIII, luminescent ZnII(valpn), and [IrIII(H2L)(ppy)2]Cl metalloligands (Hppy = 2-phenylpyridine, H2L = 2,2'-bipyridine-5,5'-di-p-benzoic acid). Single-crystal structural analysis shows that the central [IrIII(L)(ppy)2]- bridges two ZnDy moieties using two carboxylates of L2-. Measurements of organic light-emitting diodes (OLEDs) show that the maximum luminance is 284.2 cd/m2 and the turn-on voltage is 6 V. Magnetic studies reveal that Zn2Dy2Ir is a field-induced single-molecule magnet (SMM) with an energy barrier of 19.1(2) K under a 2 kOe dc field. Zn2Dy2Ir shows luminescence sensing with a quenching efficiency of up to 99.0% for 2,4,6-trinitrophenol (TNP).
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Affiliation(s)
- Min Zeng
- Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
| | - Ze-Yang Zhou
- Beijing National Laboratory for Molecular Sciences, Centre for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Xue-Ru Wu
- Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
| | - Cai-Ming Liu
- Beijing National Laboratory for Molecular Sciences, Centre for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Hui-Zhong Kou
- Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
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18
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Ma XF, Guo Y, Huang XD, Wen GH, Bao SS, Zhang YQ, Zheng LM. Polymorphism modulates photoluminescence and magnetic dynamics of mononuclear dysprosium-anthracene complexes. Dalton Trans 2022; 51:12026-12030. [PMID: 35904084 DOI: 10.1039/d2dt01710e] [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
Complexes α-Dy(depma)3Cl3 (α-DyCl), β-Dy(depma)3Cl3 (β-DyCl) and β-Dy(depma)3Br3 (β-DyBr) (depma = 9-diethylphosphono-methylanthracene) are reported. α-DyCl and β-DyCl are polymorphs showing distinct magnetic dynamics with energy barriers of 32.3 K and 66.6 K. They also show distinct luminescence properties with emission peaks at 487 nm and 530 nm, respectively.
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Affiliation(s)
- Xiu-Fang Ma
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210023, P. R. China.
| | - Ying Guo
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China.
| | - Xin-Da Huang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210023, P. R. China.
| | - Ge-Hua Wen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210023, P. R. China.
| | - Song-Song Bao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210023, P. R. China.
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China.
| | - Li-Min Zheng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210023, P. R. China.
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19
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Jin PB, Yu KX, Luo QC, Liu YY, Zhai YQ, Zheng YZ. Tetraanionic arachno-Carboranyl Ligand Imparts Strong Axiality to Terbium(III) Single-Molecule Magnets. Angew Chem Int Ed Engl 2022; 61:e202203285. [PMID: 35426226 DOI: 10.1002/anie.202203285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Indexed: 02/05/2023]
Abstract
A family of fully sandwiched arachno-lanthanacarborane complexes formulated as {η6 -[μ-1,2-[o-C6 H4 (CH2 )2 ]-1,2-C2 B10 H10 ]2 Ln}{Li5 (THF)10 } (Ln=Tb, Dy, Ho, Er, Y) is successfully synthesized, where the "carbons-adjacent" carboranyl ligand (arachno-R2 -C2 B10 H10 4- ) bears four negative charges and coordinates to the central lanthanide ions using the hexagonal η6 C2 B4 face. Thus, the central lanthanide cations are pseudo-twelve-coordinate and have an approximate pseudo-D6h symmetry or hexagonal-prismatic geometry. As the crystal field effect imparted by this geometry is still unknown, we thoroughly investigated the magnetic properties of this series of complexes and found that the crystal field imposed by this ligand causes a relation of Tb>Dy>Ho>Er for the energy gaps between the ground and the first excited states, which is of striking resemblance to the ferrocenophane and phthalocyanine ligands although the latter two ligands give disparate local coordination geometries. Moreover, the effective energy barrier to magnetization reversal of 445(10) K, the observable hysteresis loop up to 4 K and the relaxation time of the yttrium-diluted sample reaching 193(17) seconds at 2 K under an optimized field for the Tb analogue of this family of arachno-lanthanacarborane complexes, render a new benchmark for Tb3+ -based single-molecule magnets.
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Affiliation(s)
- Peng-Bo Jin
- Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Mater, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, 710054, P. R. China
| | - Ke-Xin Yu
- Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Mater, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, 710054, P. R. China
| | - Qian-Cheng Luo
- Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Mater, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, 710054, P. R. China
| | - Ye-Ye Liu
- Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Mater, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, 710054, P. R. China
| | - Yuan-Qi Zhai
- Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Mater, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, 710054, P. R. China
| | - Yan-Zhen Zheng
- Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Mater, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, 710054, P. R. China
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20
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Ma Y, Zhai YQ, Luo QC, Ding YS, Zheng YZ. Ligand Fluorination to Mitigate the Raman Relaxation of Dy III Single-Molecule Magnets: A Combined Terahertz, Far-IR and Vibronic Barrier Model Study. Angew Chem Int Ed Engl 2022; 61:e202206022. [PMID: 35543224 DOI: 10.1002/anie.202206022] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Indexed: 11/09/2022]
Abstract
The fast Raman relaxation process via a virtual energy level has become a puzzle for how to chemically engineer single-molecule magnets (SMMs) with better performance. Here, we use the trifluoromethyl group to systematically substitute the methyl groups in the axial position of the parent bis-butoxide pentapyridyl dysprosium(III) SMM. The resulting complexes-[Dy(OLA )2 py5 ][BPh4 ] (LA =CH(CF3 )2 - 1, CH2 CF3 - 2, CMe2 CF3 - 3)-show progressively enhanced TB hys (@100 Oe s-1 ) from 17 K (for 3), 20 K (for 2) to 23 K (for 1). By experimentally identifying the varied under barrier relaxation energy in the 5-500 cm-1 regime, we are able to identify that the C-F bond related vibration energy of the axial ligand ranging from 200 to 350 cm-1 is the key variant for this improvement. Thus, this finding not only reveals a correlation between the structure and the Raman process but also provides a paradigm for how to apply the vibronic barrier model to analyze multi-phonon relaxation processes in lanthanide SMMs.
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Affiliation(s)
- Yan Ma
- Frontier Institute of Science and Technology (FIST), State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi 710054, P. R. China
| | - Yuan-Qi Zhai
- Frontier Institute of Science and Technology (FIST), State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi 710054, P. R. China
| | - Qian-Cheng Luo
- Frontier Institute of Science and Technology (FIST), State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi 710054, P. R. China
| | - You-Song Ding
- Frontier Institute of Science and Technology (FIST), State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi 710054, P. R. China
| | - Yan-Zhen Zheng
- Frontier Institute of Science and Technology (FIST), State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi 710054, P. R. China
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21
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Corredoira-Vázquez J, González-Barreira C, Fondo M, García-Deibe AM, Sanmartín-Matalobos J, Gómez-Coca S, Ruiz E, Colacio E. Dinuclear Fluoride Single-Bridged Lanthanoid Complexes as Molecule Magnets: Unprecedented Coupling Constant in a Fluoride-Bridged Gadolinium Compound. Inorg Chem 2022; 61:9946-9959. [PMID: 35737854 PMCID: PMC9275779 DOI: 10.1021/acs.inorgchem.2c00773] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
A new synthetic method
allows isolating fluoride-bridged complexes
Bu4N{[M(3NO2,5Br-H3L1,1,4)]2(μ-F)} (M = Dy, 1; M = Ho, 2; M = Gd, 3) and Bu4N{[Dy(3Br,5Cl-H3L1,2,4)]2(μ-F)}·2H2O, 4·2H2O. The crystal structures of 1·5CH3C6H5,·2·2H2O·0.75THF, 3, and 4·2H2O·2THF show that all of them are
dinuclear compounds with linear single fluoride bridges and octacoordinated
metal centers. Magnetic susceptibility measurements in the temperature
range of 2–300 K reveal that the GdIII ions in 3 are weakly antiferromagnetically coupled, and this constitutes
the first crystallographically and magnetically analyzed gadolinium
complex with a fluoride bridge. Variable-temperature magnetization
demonstrates a poor magnetocaloric effect for 3. Alternating
current magnetic measurements for 1, 2,
and 4·2H2O bring to light that 4·2H2O is an SMM, 1 shows an
SMM-like behavior under a magnetic field of 600 Oe, while 2 does not show relaxation of the magnetization even under an applied
magnetic field. In spite of this, 2 is the first fluoride-bridged
holmium complex magnetically analyzed. DFT and ab initio calculations support the experimental magnetic results and show
that apparently small structural differences between 1 and 4·2H2O introduce important changes
in the dipolar interactions, from antiferromagnetic in 1 to ferromagnetic in 4·2H2O. Dinuclear linear fluoride single-bridged
DyIII, HoIII, and GdIII complexes
are systematically
obtained from mononuclear aquo-complexes, with the DyIII ones showing slow relaxation of the magnetization and the GdIII one revealing a weak AF coupling through the Gd−F−Gd
bridge.
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Affiliation(s)
- Julio Corredoira-Vázquez
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Cristina González-Barreira
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Matilde Fondo
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Ana M García-Deibe
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Jesús Sanmartín-Matalobos
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - Silvia Gómez-Coca
- Departament de Química Inorgànica i Orgànica, and Institut de Química Teórica i Computacional, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica i Orgànica, and Institut de Química Teórica i Computacional, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Enrique Colacio
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avda Fuentenueva s/n, 18071 Granada, Spain
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22
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Ma Y, Zhai Y, Luo Q, Ding Y, Zheng Y. Ligand Fluorination to Mitigate the Raman Relaxation of Dy
III
Single‐Molecule Magnets: A Combined Terahertz, Far‐IR and Vibronic Barrier Model Study. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yan Ma
- Frontier Institute of Science and Technology (FIST) State Key Laboratory for Mechanical Behavior of Materials MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry School of Chemistry and School of Physics Xi'an Jiaotong University 99 Yanxiang Road Xi'an Shaanxi 710054 P. R. China
| | - Yuan‐Qi Zhai
- Frontier Institute of Science and Technology (FIST) State Key Laboratory for Mechanical Behavior of Materials MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry School of Chemistry and School of Physics Xi'an Jiaotong University 99 Yanxiang Road Xi'an Shaanxi 710054 P. R. China
| | - Qian‐Cheng Luo
- Frontier Institute of Science and Technology (FIST) State Key Laboratory for Mechanical Behavior of Materials MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry School of Chemistry and School of Physics Xi'an Jiaotong University 99 Yanxiang Road Xi'an Shaanxi 710054 P. R. China
| | - You‐Song Ding
- Frontier Institute of Science and Technology (FIST) State Key Laboratory for Mechanical Behavior of Materials MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry School of Chemistry and School of Physics Xi'an Jiaotong University 99 Yanxiang Road Xi'an Shaanxi 710054 P. R. China
| | - Yan‐Zhen Zheng
- Frontier Institute of Science and Technology (FIST) State Key Laboratory for Mechanical Behavior of Materials MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry School of Chemistry and School of Physics Xi'an Jiaotong University 99 Yanxiang Road Xi'an Shaanxi 710054 P. R. China
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23
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Luo QC, Ge N, Zhai YQ, Wang T, Sun L, Sun Q, Li F, Fu Z, Zheng YZ. Switching the coordination geometry to enhance erbium(III) single-molecule magnets. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.05.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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24
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Jin PB, Yu KX, Luo QC, Liu YY, Zhai YQ, Zheng YZ. Tetraanionic arachno‐Carboranyl Ligand Imparts Strong Axiality to Terbium(III) Single‐Molecule Magnets. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Peng-Bo Jin
- Xi'an Jiaotong University Frontier Institute of Science and Technology CHINA
| | - Ke-Xin Yu
- Xi'an Jiaotong University Frontier Institute of Science and Technology CHINA
| | - Qian-Cheng Luo
- Xi'an Jiaotong University Frontier Institute of Science and Technology CHINA
| | - Ye-Ye Liu
- Xi'an Jiaotong University Frontier Institute of Science and Technology CHINA
| | - Yuan-Qi Zhai
- Xi'an Jiaotong University Frontier Institute of Science and Technology CHINA
| | - Yan-Zhen Zheng
- Frontier Institute of Science and Technology Center for Applied Chemical Research 99 Yan Xiang LuQujiang Campus of Xi'an Jiaotong UniversityA316 Xi Yi Lou 710054 Xian CHINA
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25
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Slow magnetic relaxation in a 3D dysprosium(III)-fluoro-oxalate framework containing zig-zag [Dy-F] chains. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2022.02.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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Mondal A, Konar S. Effect of an axial coordination environment on quantum tunnelling of magnetization for dysprosium single-ion magnets with theoretical insight. Dalton Trans 2022; 51:1464-1473. [PMID: 34988577 DOI: 10.1039/d1dt03678e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Herein, we report two mononuclear dysprosium complexes [Dy(H4L){B(OMe)2(Ph)2}2](Cl)·MeOH (1) and [Dy(H4L){MeOH)2(NCS)2}](Cl) (2) [where H4L = 2,2'-(pyridine-2,6-diylbis(ethan-1-yl-1-ylidene))bis(N-phenylhydrazinecarboxamide)] with different axial coordination environments. The structural analysis revealed that the pentadentate H4L ligand binds through the equatorial position in both complexes. In complex 1, the axial positions are occupied by bidentate dimethoxydiphenyleborate [B(OMe)2(Ph)2]-. On the other hand, in complex 2, one axial position is occupied by two NCS- and one MeOH molecule while another MeOH molecule is coordinated to the other axial position. Magnetic measurements disclose the presence of field-induced slow relaxation of magnetization with an energy barrier of Ueff = 30 K for 1 whereas no such effective barrier was observed in complex 2. Detailed analysis of field and temperature dependence of the relaxation time confirms the major role of Raman, QTM, and direct processes rather than the Orbach process in complex 1. It was observed that [B(OMe)2(Ph)2]- provides higher axial anisotropy which slows down the QTM process (relaxation time for the QTM process is 2.70 × 10-5 s) in 1 as compared to NCS anions and MeOH molecules in 2 (1.03 × 10-8 s), and is responsible for the absence of an effective energy barrier in the latter complex as confirmed by ab initio calculations. The calculations also show that the presence of a large bidentate dimethoxydiphenyleborate ligand in axial positions may result in high-performance Dy-based single-ion magnets.
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Affiliation(s)
- Arpan Mondal
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass road, Bhauri, Bhopal-462066, MP, India.
| | - Sanjit Konar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass road, Bhauri, Bhopal-462066, MP, India.
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27
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Long J, Lyubov DM, Gurina GA, Nelyubina YV, Salles F, Guari Y, Larionova J, Trifonov AA. Using N-Heterocyclic Carbenes as Weak Equatorial Ligands to Design Single-Molecule Magnets: Zero-Field Slow Relaxation in Two Octahedral Dysprosium(III) Complexes. Inorg Chem 2022; 61:1264-1269. [PMID: 34994542 DOI: 10.1021/acs.inorgchem.1c03429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report the synthesis, structures, and magnetic investigations of two new octahedral dysprosium complexes, based on the original N-heterocyclic carbene (NHC) tridentate bis(phenoxide) ligand, of the respective formulas mer-[DyL(THF)2Cl] (1) and mer-[DyL(THF)3][BPh4] (2), where L = 1,3-bis(3,5-di-tert-butyl-2-oxidophenyl)-5,5-dimethyl-3,4,5,6-tetrahydropyrimidin-1-ium chloride and THF = tetrahydrofuran. The short Dy-O distances in the axial direction in association with the weak donor ability of the NHC moiety provide a suitable environment for slow relaxation of magnetization, overcoming the previous single-molecule magnets based on NHC ligands.
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Affiliation(s)
- Jérôme Long
- ICGM, Univ. Montpellier, CNRS, ENSCM, 34095 Montpellier, France.,Institut Universitaire de France, 1 rue Descartes, 75231 Paris Cedex 05, France
| | - Dmitry M Lyubov
- Nesmeyanov Institute of Organoelement Compounds (INEOS), Russian Academy of Sciences (RAS), 28 Vavilova str., 119334 Moscow, Russia.,Institute of Organometallic Chemistry, Russian Academy of Sciences (RAS), 49 Tropinina str., GSP-445, 630950 Nizhny, Novgorod, Russia
| | - Galina A Gurina
- Institute of Organometallic Chemistry, Russian Academy of Sciences (RAS), 49 Tropinina str., GSP-445, 630950 Nizhny, Novgorod, Russia
| | - Yulia V Nelyubina
- Nesmeyanov Institute of Organoelement Compounds (INEOS), Russian Academy of Sciences (RAS), 28 Vavilova str., 119334 Moscow, Russia
| | - Fabrice Salles
- ICGM, Univ. Montpellier, CNRS, ENSCM, 34095 Montpellier, France
| | - Yannick Guari
- ICGM, Univ. Montpellier, CNRS, ENSCM, 34095 Montpellier, France
| | | | - Alexander A Trifonov
- Nesmeyanov Institute of Organoelement Compounds (INEOS), Russian Academy of Sciences (RAS), 28 Vavilova str., 119334 Moscow, Russia.,Institute of Organometallic Chemistry, Russian Academy of Sciences (RAS), 49 Tropinina str., GSP-445, 630950 Nizhny, Novgorod, Russia
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28
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Li HQ, Sun YC, Shi L, Chen FL, Shen FX, Zhao Y, Wang XY. Modulating the Structures and Magnetic Properties of Dy(III) Single-Molecule Magnets through Acid-Base Regulation. Inorg Chem 2022; 61:2272-2283. [PMID: 35025491 DOI: 10.1021/acs.inorgchem.1c03639] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chemical modulation on the structures and physical properties of the coordination complexes is of great interest for the preparation of new functional materials. By changing the acidity or basicity of the reaction medium, the deprotonation degree of a multidentate ligand with multiple active protons, H4daps (H4daps = N',N'″-((1E,1'E)-pyridine-2,6-diylbis(ethan-1-yl-1-ylidene))bis(2-hydroxybenzohydrazide)), can be regulated on purpose. With this ligand of different deprotonation and charges, three new DyIII complexes ([Dy(H3daps)(CH3COO)2(EtOH)]·CH3COOH (1Dy), [Dy2(H2daps)2(EtOH)2(H2O)2(MeOH)2](CF3SO3)2·(H2O)2 (2Dy), and [Dy3(H1daps)2(H2daps)(μ3-OH)(EtOH)(H2O)] (3Dy)) of different nuclearities (mono-, di-, and trinuclear for 1Dy to 3Dy, respectively) have been synthesized and characterized structurally and magnetically. Analyses on the related bond lengths and resulting hydrogen bond modes in the complexes provide the details of the deprotonation position and the charge of the ligands, which can be in the form of H3daps-, H2daps2-, and H1daps3-. Interestingly, the more deprotonated ligand can act as a bridging ligand between the DyIII centers using the phenol and/or carbonyl oxygen atoms, which leads to the multinuclear structures. Magnetic studies on these complexes revealed that complex 1Dy is a field-induced single-molecule magnet (SMM), while complexes 2Dy and 3Dy show SMM behavior under a zero dc field.
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Affiliation(s)
- Hong-Qing Li
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yu-Chen Sun
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Le Shi
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Feng-Li Chen
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Fu-Xing Shen
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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29
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Ding X, Luo Q, Zhai Y, Zhang X, Lv Y, Zhang X, Ke C, Wu C, Zheng Y. Rigid Dysprosium(
III
)
Single‐Molecule
Magnets Exhibit Preserved Superparamagnetism in Solution. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202100722] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xiali Ding
- Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior for Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University 99 Yanxiang Road, Xi'an Shaanxi 710054 China
| | - Qiancheng Luo
- Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior for Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University 99 Yanxiang Road, Xi'an Shaanxi 710054 China
| | - Yuanqi Zhai
- Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior for Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University 99 Yanxiang Road, Xi'an Shaanxi 710054 China
| | - Xufeng Zhang
- Department of Hepatobiliary Surgery and The First Affiliated Hospital of Xi'an Jiaotong University 277 West Yanta Road Xi'an Shaanxi 710061 China
| | - Yi Lv
- Department of Hepatobiliary Surgery and The First Affiliated Hospital of Xi'an Jiaotong University 277 West Yanta Road Xi'an Shaanxi 710061 China
| | - Xinliang Zhang
- Department of Spine Surgery, Honghui Hospital, Xi'an Jiaotong University 76 Nanguo Road Xi'an Shaanxi 710054 China
| | - Chao Ke
- Department of Orthopaedics and Trauma, Hong Hui Hospital, College of Medicine, Xi'an Jiaotong University 555 East Youyi Road, Xi'an Shaanxi 710054 China
| | - Chao Wu
- Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior for Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University 99 Yanxiang Road, Xi'an Shaanxi 710054 China
| | - Yanzhen Zheng
- Frontier Institute of Science and Technology (FIST), State Key Laboratory of Mechanical Behavior for Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry and School of Physics, Xi'an Jiaotong University 99 Yanxiang Road, Xi'an Shaanxi 710054 China
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30
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Long J, Lyubov DM, Kissel' AA, Gogolev IA, Tyutyunov AA, Nelyubina YV, Salles F, Guari Y, Cherkasov AV, Larionova J, Trifonov AA. Effect on the geometry over the slow relaxation of the magnetization in a series of erbium( iii) complexes based on halogenated ligands. CrystEngComm 2022. [DOI: 10.1039/d2ce00856d] [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
Erbium(iii) complexes based on halogenated ligands.
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Affiliation(s)
- Jérôme Long
- ICGM, CNRS, ENSCM, Univ. Montpellier, Montpellier, France
- Institut Universitaire de France (IUF), 1 rue Descartes, 75231 Paris Cedex 05, France
| | - Dmitry M. Lyubov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod, Russia
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str, 119334, Moscow, Russia
| | - Alexander A. Kissel'
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str, 119334, Moscow, Russia
| | - Ilia A. Gogolev
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str, 119334, Moscow, Russia
| | - Andrey A. Tyutyunov
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str, 119334, Moscow, Russia
| | - Yulia V. Nelyubina
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str, 119334, Moscow, Russia
| | - Fabrice Salles
- ICGM, CNRS, ENSCM, Univ. Montpellier, Montpellier, France
| | - Yannick Guari
- ICGM, CNRS, ENSCM, Univ. Montpellier, Montpellier, France
| | - Anton V. Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod, Russia
| | | | - Alexander A. Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod, Russia
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str, 119334, Moscow, Russia
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31
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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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32
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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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33
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Li M, Han J, Wu H, Du YE, Liu Y, Chen Y, Chen S. Effects of strong coordination bonds at the axial or equatorial positions on magnetic relaxation for pentagonal bipyramidal dysprosium( iii) single-ion magnets. Dalton Trans 2022; 51:16964-16972. [DOI: 10.1039/d2dt02402k] [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
Pentagonal bipyramidal dysprosium(iii) complexes with different strong coordination bonds at axial or equatorial positions show a significant variation in their magnetic relaxation behavior.
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Affiliation(s)
- Min Li
- Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong, 030619, China
| | - Jiayi Han
- Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong, 030619, China
| | - Haipeng Wu
- Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong, 030619, China
| | - Yi-en Du
- Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong, 030619, China
| | - Yufang Liu
- Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong, 030619, China
| | - Yongqiang Chen
- Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong, 030619, China
| | - Sanping Chen
- 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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34
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Yu S, Hu HC, Liu D, Liang Y, Liang F, Yin B, Chen Z. Structural and magnetic studies of six-coordinated Schiff base Dy(III) complexes. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00356b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
With the aim to tune magnetic anisotropies of six-coordinated Dy(III) complexes, four bis-Schiff bases bearing different spacers and one mono-Schiff base were designed, which are bis(2-hydroxylnaphthalenylmethylene)hydrazine (H2L1), bis(2-hydroxylnaphthylmethylene)ethylenediamine (H2L2), bis(2-hydroxylnaphthylmethylene)-propylenediamine...
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35
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Zhao C, Zhu Z, Li XL, Tang J. Air-stable chiral mono- and dinuclear dysprosium single-molecule magnets: steric hindrance of hexaazamacrocycles. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00754a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two pairs of air-stable chiral Dy-SMMs were constructed using different sterically hindered hexaazamacrocycles as equatorial ligands, leading to a nuclearity increase from 1 to 2.
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Affiliation(s)
- Chen Zhao
- 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
| | - 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
| | - Xiao-Lei Li
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, 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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36
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Panja A, Jagličić Z, Herchel R, Brandão P, Jana NC. Influence of bridging and chelating co-ligands on the distinct single-molecule magnetic behaviours in ZnDy complexes. NEW J CHEM 2022. [DOI: 10.1039/d2nj03793a] [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
Four ZnDy complexes display an effect of bridging/chelating co-ligands on distinct single-molecule magnetic behaviours, relaxing through single to multi relaxation channels.
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Affiliation(s)
- Anangamohan Panja
- Department of Chemistry, Panskura Banamali College, Panskura RS, WB, 721152, India
- Department of Chemistry, Gokhale Memorial Girls' College, 1/1 Harish Mukherjee Road, Kolkata, 700020, India
| | - Zvonko Jagličić
- Institute of Mathematics, Physics and Mechanics & Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jadranska 19, 1000, Ljubljana, Slovenia
| | - Radovan Herchel
- Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 77146, Olomouc, Czech Republic
| | - Paula Brandão
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Narayan Ch. Jana
- Department of Chemistry, Panskura Banamali College, Panskura RS, WB, 721152, India
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37
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Ding YS, Blackmore WJA, Zhai YQ, Giansiracusa MJ, Reta D, Vitorica-Yrezabal I, Winpenny REP, Chilton NF, Zheng YZ. Studies of the Temperature Dependence of the Structure and Magnetism of a Hexagonal-Bipyramidal Dysprosium(III) Single-Molecule Magnet. Inorg Chem 2021; 61:227-235. [PMID: 34939782 DOI: 10.1021/acs.inorgchem.1c02779] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The hexagonal-bipyramidal lanthanide(III) complex [Dy(OtBu)Cl(18-C-6)][BPh4] (1; 18-C-6 = 1,4,7,10,13,16-hexaoxacyclooctadecane ether) displays an energy barrier for magnetization reversal (Ueff) of ca. 1000 K in a zero direct-current field. Temperature-dependent X-ray diffraction studies of 1 down to 30 K reveal bending of the Cl-Ln-OtBu angle at low temperature. Using ab initio calculations, we show that significant bending of the O-Dy-Cl angle upon cooling from 273 to 100 K leads to a ca. 10% decrease in the energy of the excited electronic states. A thorough exploration of the temperature and field dependencies of the magnetic relaxation rate reveals that magnetic relaxation is dictated by five mechanisms in different regimes: Orbach, Raman-I, quantum tunnelling of magnetization, and Raman-II, in addition to the observation of a phonon bottleneck effect.
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Affiliation(s)
- You-Song Ding
- Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry, and School of Physics, Xi'an Jiaotong University, Xi'an 710049, P. R. China.,Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom.,Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - William J A Blackmore
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Yuan-Qi Zhai
- Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry, and School of Physics, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Marcus J Giansiracusa
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Daniel Reta
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Inigo Vitorica-Yrezabal
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Richard E P Winpenny
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Nicholas F Chilton
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Yan-Zhen Zheng
- Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry, and School of Physics, Xi'an Jiaotong University, Xi'an 710049, P. R. China
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38
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Rasamsetty A, Mehta S, Ansari KU, Kumar P, Mondal A, Shanmugam M. Six-coordinated dinuclear lanthanide(III) amide complexes: investigation of magnetization relaxation dynamics and their electronic structures. Dalton Trans 2021; 51:63-68. [PMID: 34889328 DOI: 10.1039/d1dt03708k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A series of rare six-coordinated dinuclear Ln(III) complexes [Ln2(μ-Cl)2Cl4Li2(L)2(THF)6] were structurally characterized using a bulky amide ligand (L; Ln = Gd(1), Dy(2) and Y(3)). Detailed magnetic studies disclose that a weak antiferromagnetic coupling exists within 1 (-0.09 cm-1) and 2 (-0.07 cm-1; -2J Hamiltonian). Additionally, this study unveils the importance of the amide ligand at the coordination site of Dy(III), which manifests a slow relaxation of magnetization in the absence of an external magnetic field. This has been rationalized by detailed ab initio calculations as well as the electronic structure determination of 1 and 2.
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Affiliation(s)
- Amaleswari Rasamsetty
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, Maharashtra, India.
| | - Sakshi Mehta
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
| | - Kamal Uddin Ansari
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, Maharashtra, India.
| | - Pardeep Kumar
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, Maharashtra, India.
| | - Abhishake Mondal
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
| | - Maheswaran Shanmugam
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, Maharashtra, India.
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39
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Gupta SK, Dey S, Rajeshkumar T, Rajaraman G, Murugavel R. Deciphering the Role of Anions and Secondary Coordination Sphere in Tuning Anisotropy in Dy(III) Air-Stable D 5h SIMs*. Chemistry 2021; 28:e202103585. [PMID: 34788493 DOI: 10.1002/chem.202103585] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Indexed: 01/05/2023]
Abstract
Precise control of the crystal field and symmetry around the paramagnetic spin centre has recently facilitated the engineering of high-temperature single-ion magnets (SIMs), the smallest possible units for future spin-based devices. In the present work, we report a series of air-stable seven coordinate Dy(III) SIMs {[L2 Dy(H2 O)5 ][X]3 ⋅L2 ⋅n(H2 O), n = 0, X = Cl (1), n=1, X = Br (2), I (3)} possessing pseudo-D5h symmetry or pentagonal bipyramidal coordination geometry with high anisotropy energy barrier (Ueff ) and blocking temperature (TB ). While the strong axial coordination from the sterically encumbered phosphonamide, t BuPO(NHi Pr)2 (L), increases the overall anisotropy of the system, the presence of high symmetry significantly quenches quantum tunnelling of magnetization, which is the prominent deactivating factor encountered in SIMs. The energy barrier (Ueff ) and the blocking temperature (TB ) decrease in the order 3>2>1 with the change of anions from larger iodide to smaller strongly hydrogen-bonded chloride in the secondary coordination sphere, albeit the local coordination geometry and the symmetry around the Dy(III) display only slight deviations. Ab initio CASSCF/RASSI-SO/SINGLE_ANISO calculations provide deeper insights into the dynamics of magnetic relaxation in addition to the role of the secondary coordination sphere in modulating the anisotropy of the D5h systems, using diverse models. Thus, in addition to the importance of the crystal field and the symmetry to obtain high-temperature SIMs, this study also probes the significance of the secondary coordination sphere that can be tailored to accomplish novel SIMs.
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Affiliation(s)
- Sandeep K Gupta
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, 400 076, India
| | - Sourav Dey
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, 400 076, India
| | - Thayalan Rajeshkumar
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, 400 076, India
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, 400 076, India
| | - Ramaswamy Murugavel
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, 400 076, India
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40
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Sun G, Huang X, Shang T, Yan S, Bao S, Lu X, Zhang Y, Zheng L. Polar Lanthanide Anthracene Complexes Exhibiting Magnetic, Luminescent and Dielectric Properties. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Guo‐Bin Sun
- State Key Laboratory of Coordination Chemistry Coordination Chemistry Institute School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
- Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China
| | - Xin‐Da Huang
- State Key Laboratory of Coordination Chemistry Coordination Chemistry Institute School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
- Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China
| | - Tao Shang
- Jiangsu Key Laboratory for NSLSCS School of Physical Science and Technology Nanjing Normal University Nanjing 210023 China
| | - Shuo Yan
- National Laboratory of Solid State Microstructures and Physics School Nanjing University Nanjing 210093 China
- Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China
| | - Song‐Song Bao
- State Key Laboratory of Coordination Chemistry Coordination Chemistry Institute School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
- Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China
| | - Xiao‐Mei Lu
- National Laboratory of Solid State Microstructures and Physics School Nanjing University Nanjing 210093 China
- Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China
| | - Yi‐Quan Zhang
- Jiangsu Key Laboratory for NSLSCS School of Physical Science and Technology Nanjing Normal University Nanjing 210023 China
| | - Li‐Min Zheng
- State Key Laboratory of Coordination Chemistry Coordination Chemistry Institute School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
- Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China
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41
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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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42
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Li X, Liu YH, Zhu GZ, Yang FL, Gao F. Successive syntheses and magnetic properties of homodinuclear lanthanide macrocyclic complexes. Dalton Trans 2021; 50:12215-12225. [PMID: 34396380 DOI: 10.1039/d1dt01514a] [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
A series of homodinuclear β-diketone lanthanide(III) complexes, formulated as [(acac)4Ln2(L1)] (Ln3+ = Dy3+ (1), Tb3+ (2), and Gd3+ (3), respectively) were first synthesized based on a closed-macrocyclic ligand (H2L1) derived from the [2 + 2] cyclocondensation of 4-tert-butyl-2,6-diformylphenol and o-phenylenediamine in the presence of lanthanide acetylacetonates. Subsequently, by using the above compounds as building blocks to assemble directly with another Schiff base ligand, N,N'-bis(5-chlorosalicylidene)-o-phenylenediamine (H2L2), three new homodinuclear sandwich-type lanthanide complexes with the general formula [Ln2(L1)(L2)2] (Ln3+ = Dy3+ (4), Tb3+ (5), and Gd3+ (6), respectively) were further designed and prepared. Single-crystal X-ray analyses show that the central Ln3+ ion adopts a distorted square antiprism conformation with D4d local symmetry. Magnetic studies reveal ferromagnetic interaction between Dy3+ and Tb3+ centres and zero-field slow relaxation of magnetization for Dy complexes 1 and 4. The corresponding magneto-structural correlations of SMMs 1 and 4 were further discussed by theoretical calculations and with experimental outcomes.
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Affiliation(s)
- Xiang Li
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China.
| | - Yu-Han Liu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China.
| | - Guang-Zhou Zhu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China.
| | - Feng-Lei Yang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China.
| | - Feng Gao
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China.
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43
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Switching the Local Symmetry from D5h to D4h for Single-Molecule Magnets by Non-Coordinating Solvents. INORGANICS 2021. [DOI: 10.3390/inorganics9080064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A solvent effect towards the performance of two single-molecule magnets (SMMs) was observed. The tetrahydrofuran and toluene solvents can switch the equatorial coordinated 4-Phenylpyridine (4-PhPy) molecules from five to four, respectively, in [Dy(OtBu)2(4-PhPy)5]BPh41 and Na{[Dy(OtBu)2(4-PhPy)4][BPh4]2}∙2thf∙hex 2. This alternation significantly changes the local coordination symmetry of the Dy(III) center from D5h to D4h for 1 and 2, seperately. Magnetic studies show that the magnetic anisotropy energy barrier of 2 is higher than that of 1, while the relation of blocking temperature is just on the contrary due to the symmetry effect. The calculations of the electrostatic potential successfully explained the driving force of solvents for the molecular structure change, confirming the feasibility of adjusting the performance of SMMs via diverse solvents.
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44
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Long J, Selikhov AN, Rad'kova NY, Cherkasov AV, Guari Y, Larionova J, Trifonov AA. Synthesis, Structures and Magnetic Properties of two Heteroleptic Dy
3+
Borohydride Complexes. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100436] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jérôme Long
- ICGM Univ. Montpellier CNRS, ENSCM Montpellier France
| | - Alexander N. Selikhov
- Institute of Organometallic Chemistry of Russian Academy of Sciences 49 Tropinina str., GSP-445 630950 Nizhny Novgorod Russia
- Institute of Organoelement Compounds of Russian Academy of Sciences 28 Vavilova str. 119334 Moscow Russia
| | - Natalia Yu. Rad'kova
- Institute of Organometallic Chemistry of Russian Academy of Sciences 49 Tropinina str., GSP-445 630950 Nizhny Novgorod Russia
| | - Anton V. Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences 49 Tropinina str., GSP-445 630950 Nizhny Novgorod Russia
| | - Yannick Guari
- ICGM Univ. Montpellier CNRS, ENSCM Montpellier France
| | | | - Alexander A. Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Sciences 49 Tropinina str., GSP-445 630950 Nizhny Novgorod Russia
- Institute of Organoelement Compounds of Russian Academy of Sciences 28 Vavilova str. 119334 Moscow Russia
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45
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Parmar VS, Mills DP, Winpenny REP. Mononuclear Dysprosium Alkoxide and Aryloxide Single-Molecule Magnets. Chemistry 2021; 27:7625-7645. [PMID: 33555090 PMCID: PMC8252031 DOI: 10.1002/chem.202100085] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Indexed: 12/17/2022]
Abstract
Recent studies have shown that mononuclear lanthanide (Ln) complexes can be high‐performing single‐molecule magnets (SMMs). Recently, there has been an influx of mononuclear Ln alkoxide and aryloxide SMMs, which have provided the necessary geometrical control to improve SMM properties and to allow the intricate relaxation dynamics of Ln SMMs to be studied in detail. Here non‐aqueous Ln alkoxide and aryloxide chemistry applied to the synthesis of low‐coordinate mononuclear Ln SMMs are reviewed. The focus is on mononuclear DyIII alkoxide and aryloxide SMMs with coordination numbers up to eight, covering synthesis, solid‐state structures and magnetic attributes. Brief overviews are also provided of mononuclear TbIII, HoIII, ErIII and YbIII alkoxide and aryloxide SMMs.
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Affiliation(s)
- Vijay S Parmar
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - David P Mills
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Richard E P Winpenny
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
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46
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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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47
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Long J, Tolpygin AO, Lyubov DM, Rad'kova NY, Cherkasov AV, Nelyubina YV, Guari Y, Larionova J, Trifonov AA. High magnetization reversal barriers in luminescent dysprosium octahedral and pentagonal bipyramidal single-molecule magnets based on fluorinated alkoxide ligands. Dalton Trans 2021; 50:8487-8496. [PMID: 34047741 DOI: 10.1039/d1dt01319j] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We report the synthesis and structures of three luminescent dysprosium(iii) complexes based on fluorinated alkoxide ligands of formulas [Dy(L1)2(THF)4][BPh4]·0.5THF (1), [Dy(L2)2(THF)5][BPh4]·2.5THF (2) and [Dy(L3)2(THF)5][BPh4]·2THF (3) (L1 = (CF3)3CO-, L2 = C6F5C6F4O-, L3 = C6F5C(CH3)O-). Despite the different dysprosium ion geometries (octahedral vs. distorted pentagonal bipyramidal), these systems exhibit a single-molecule magnet (SMM) behavior, but with distinct relaxation dynamics. Moreover, a typical dysprosium-based luminescence is observed for the three complexes, which make them bifunctional magneto-luminescent SMMs. Remarkably, complex 3 exhibits a high anisotropy barrier of 1469 cm-1 and a blocking temperature of 22 K, making it one of the most performant alkoxide-based SMMs with the highest blocking temperature for a luminescent SMM.
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Affiliation(s)
- Jérôme Long
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France.
| | - Aleksei O Tolpygin
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia. and A.N.Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia
| | - Dmitry M Lyubov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia. and A.N.Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia
| | - Natalia Yu Rad'kova
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia.
| | - Anton V Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia.
| | - Yulia V Nelyubina
- A.N.Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia
| | - Yannick Guari
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France.
| | | | - Alexander A Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia. and A.N.Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia
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48
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Long J, Tolpygin AO, Cherkasov AV, Nelyubina YV, Guari Y, Larionova J, Trifonov AA. Tuning the coordination sphere of octahedral Dy( iii) complexes with silanolate/stannanolate ligands: synthesis, structures and slow relaxation of the magnetization. CrystEngComm 2021. [DOI: 10.1039/d1ce01266e] [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
This study reports four SMMs based on silanolate or stannanolate ligands cis-[Dy(OSiPh3)2(THF)4][BPh4]·THF·C6H6 (1), cis-[Dy(OSnPh3)2(THF)4][BPh4]·THF·C6H6·C6H14 (2), fac-[Dy(OSiPh3)3(THF)3]·THF (3) and fac-[Dy(OSiPh3)3(bipy)(THF)]·THF (4).
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Affiliation(s)
- Jérôme Long
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
- Institut Universitaire de France (IUF), 1 rue Descartes, 75231 Paris Cedex 05, France
| | - Aleksei O. Tolpygin
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod, Russia
- A.N.Nesmeyanov.Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str, 119334, Moscow, Russia
| | - Anton V. Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod, Russia
| | - Yulia V. Nelyubina
- A.N.Nesmeyanov.Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str, 119334, Moscow, Russia
| | - Yannick Guari
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France
| | | | - Alexander A. Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod, Russia
- A.N.Nesmeyanov.Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str, 119334, Moscow, Russia
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49
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Wang F, Gong HW, Zhang Y, Xue AQ, Zhu WH, Zhang YQ, Huang ZN, Sun HL, Liu B, Fang YY, Gao S. The comparative studies on the magnetic relaxation behaviour of the axially-elongated pentagonal-bipyramidal dysprosium and erbium ions in similar one-dimensional chain structures. Dalton Trans 2021; 50:8736-8745. [PMID: 34079971 DOI: 10.1039/d1dt00944c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A family of cyano-bridged 3d-4f 1D chain compounds, {RE[TM(CN)6(2-PNO)5]}·(H2O)4 {RE = YIII, TM = [FeIII]LS (1); RE = DyIII, TM = CoIII (3); RE = ErIII, TM = [FeIII]LS (4), CoIII (5); 2-PNO = 2-picoline-N-oxide} and {RE[TM(CN)6(2-PNO)5]} {RE = DyIII, TM = [FeIII]LS (2)}, were synthesized and characterized. Single-crystal X-ray diffraction studies reveal that compounds 1 and 3-5 are isostructural, while compound 2 has a similar 1D chain structure with a different chain to chain arrangement. An axially-elongated pentagonal bipyramidal (D5h) coordination geometry is formed with five 2-PNO ligands in the equatorial plane and two [TM(CN)6]3- on the apical sites around the rare earth ions in these compounds. A comparison of the magnetic relaxation behaviour in detail reveals that it is more favorable for the Er (4 and 5) than the Dy analogues (2 and 3) to exhibit SIM properties in this axially-elongated D5h coordination environment. Under zero dc field, ac susceptibility measurements show that the Dy analogues have no magnetic relaxation behaviour, while the Er analogues exhibit frequency dependence despite the strong QTM effect. Under a 1 kOe dc field, the Er analogues generally show 1-2 orders of magnitude longer relaxation time at each selected temperature and a higher relaxation energy barrier than the Dy analogues. And the RECo compounds (3 and 5) show a more suppressed QTM effect than the corresponding REFe (2 and 4) compounds, which may be ascribed to the elimination of the fluctuation field from the neighbouring [FeIII]LS ions. The ab initio calculations indicate the misplacement between the orientation of the main magnetic axis and the structural axis in the Dy analogues, and the relative consistency in the Er analogues, which should be the source of the Er analogues showing better SIM properties than the Dy analogues.
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Affiliation(s)
- Fei Wang
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China.
| | - Hui-Wen Gong
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China.
| | - Yan Zhang
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China.
| | - An-Qi Xue
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China.
| | - Wen-Hua Zhu
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China.
| | - Yi-Quan Zhang
- Jiangsu Key Lab for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing, Jiangsu 210023, P. R. China.
| | - Zhen-Na Huang
- Department of Chemistry and Beijing Key Laboratory of Energy Conversion and Storage Materials, Beijing Normal University, Beijing 100875, P. R. China.
| | - Hao-Ling Sun
- Department of Chemistry and Beijing Key Laboratory of Energy Conversion and Storage Materials, Beijing Normal University, Beijing 100875, P. R. China.
| | - Bei Liu
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China.
| | - Yue-Yi Fang
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China.
| | - Song Gao
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, No. 5 Yiheyuan Road, Beijing 100871, P. R. China.
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50
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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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