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Acharya J, Ahmed N, Flores Gonzalez J, Kumar P, Cador O, Singh SK, Pointillart F, Chandrasekhar V. Slow magnetic relaxation in a homo dinuclear Dy(iii) complex in a pentagonal bipyramidal geometry. Dalton Trans 2020; 49:13110-13122. [PMID: 32930277 DOI: 10.1039/d0dt02881a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We hereby report a dinuclear Dy(iii) complex, [Dy(LH3)Cl2]2·2Et2O (1) (LH4 = 2,3-dihydroxybenzylidene)-2-(hydroxyimino)propanehydrazide where both the metal centres are in a pentagonal bipyramidal (PBP) geometry with the axial positions being occupied by negatively charged Cl- ions. The complex as well as it's 10% diluted analogue (110) do not show zero-field SMM behaviour. However, in the presence of small optimum dc fields the slow relaxation of magnetization was displayed. The effective energy barrier for 110 at 800 Oe of applied field was extracted as 83(17) K with τ0 = 2(4) × 10-12 s. Through a combined experimental and ab initio electronic structure calculations studies we have thoroughly analysed the role of the ligand field around the Dy(iii), present in pentagonal bipyramidal geometry, in contributing to the slow relaxation of magnetization.
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Affiliation(s)
- Joydev Acharya
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India.
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52
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Mondal A, Kharwar AK, Sahu PK, Konar S. Alignment of Axial Anisotropy in a 1D Coordination Polymer shows Improved Field Induced Single Molecule Magnet Behavior over a Mononuclear Seven Coordinated Fe II Complex. Chem Asian J 2020; 15:2681-2688. [PMID: 32603028 DOI: 10.1002/asia.202000666] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 06/26/2020] [Indexed: 11/11/2022]
Abstract
Herein, we report a CN-bridged alternating FeII -NiII 1D chain to ensure the alignment of axial anisotropy and improve the single molecule magnet (SMM) behavior in seven coordinated FeII compound. The chain was constructed from hepta coordinated Fe(II) complex as an anisotropic building unit and diamagnetic nickel tetra cyanate as a bridging ligand. The magnetic measurements show the easy-axis anisotropy of the seven coordinated Fe(II) complex and field induced SMM behavior with spin reversal energy barrier Ueff =61(2) K (42 cm-1 ) and pre-exponential relaxation time τ0 =1.9×10-8 s. The detailed analysis of the relaxation dynamics discloses that the Orbach process plays an important role in slow relaxation of magnetization for this compound. Notably, this example represents a remarkable energy barrier observed in hepta coordinated Fe(II) SMMs. The ab initio calculations estimate the magnitude of axial anisotropy and show the parallel orientation of the anisotropic axis throughout the 1D polymeric chain. In addition, it is also reported that the presence of weak π accepter ligands in the distorted axial position enhance the easy-axis anisotropy.
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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
| | - Ajit Kumar Kharwar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass road, Bhauri, Bhopal, 462066, MP, India
| | - Pradip Kumar Sahu
- 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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Kitos AA, Gálico DA, Castañeda R, Ovens JS, Murugesu M, Brusso JL. Stark Sublevel-Based Thermometry with Tb(III) and Dy(III) Complexes Cosensitized via the 2-Amidinopyridine Ligand. Inorg Chem 2020; 59:11061-11070. [DOI: 10.1021/acs.inorgchem.0c01534] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Alexandros A. Kitos
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Diogo A. Gálico
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Raúl Castañeda
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Jeffrey S. Ovens
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Jaclyn L. Brusso
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
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Asymmetric Dinuclear Lanthanide(III) Complexes from the Use of a Ligand Derived from 2-Acetylpyridine and Picolinoylhydrazide: Synthetic, Structural and Magnetic Studies. Molecules 2020; 25:molecules25143153. [PMID: 32664199 PMCID: PMC7397153 DOI: 10.3390/molecules25143153] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 06/30/2020] [Accepted: 07/05/2020] [Indexed: 11/17/2022] Open
Abstract
A family of four Ln(III) complexes has been synthesized with the general formula [Ln2(NO3)4(L)2(S)] (Ln = Gd, Tb, Er, and S = H2O; 1, 2 and 4, respectively/Ln = Dy, S = MeOH, complex 3), where HL is the flexible ditopic ligand N’-(1-(pyridin-2-yl)ethylidene)pyridine-2-carbohydrazide. The structures of isostructural MeOH/H2O solvates of these complexes were determined by single-crystal X-ray diffraction. The two LnIII ions are doubly bridged by the deprotonated oxygen atoms of two “head-to-head” 2.21011 (Harris notation) L¯ ligands, forming a central, nearly rhombic {LnIII2(μ-OR)2}4+ core. Two bidentate chelating nitrato groups complete a sphenocoronal 10-coordination at one metal ion, while two bidentate chelating nitrato groups and one solvent molecule (H2O or MeOH) complete a spherical capped square antiprismatic 9-coordination at the other. The structures are critically compared with those of other, previously reported metal complexes of HL or L¯. The IR spectra of 1–4 are discussed in terms of the coordination modes of the organic and inorganic ligands involved. The f-f transitions in the solid-state (diffuse reflectance) spectra of the Tb(III), Dy(III), and Er(III) complexes have been fully assigned in the UV/Vis and near-IR regions. Magnetic susceptibility studies in the 1.85–300 K range reveal the presence of weak, intramolecular GdIII∙∙∙GdIII antiferromagnetic exchange interactions in 1 [J/kB = −0.020(6) K based on the spin Hamiltonian Ĥ = −2J(ŜGd1∙ ŜGd2)] and probably weak antiferromagnetic LnIII∙∙∙LnIII exchange interactions in 2–4. Ac susceptibility measurements in zero dc field do not show frequency dependent out-of-phase signals, and this experimental fact is discussed for 3 in terms of the magnetic anisotropy axis for each DyIII center and the oblate electron density of this metal ion. Complexes 3 and 4 are Single-Molecule Magnets (SMMs) and this behavior is optimally observed under external dc fields of 600 and 1000 Oe, respectively. The magnetization relaxation pathways are discussed and a satisfactory fit of the temperature and field dependencies of the relaxation time τ was achieved considering a model that employs Raman, direct, and Orbach relaxation mechanisms.
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Ling Hou Y, Yang TT, Zhao WX, Fan CJ, Yan LL, Guan XF, Ji J, Wang WM. Modulating SMM behaviors in phenoxo-O bridged Dy2 compounds via different β-diketonate. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119595] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Mondal A, Roy S, Konar S. Remarkable Energy Barrier for Magnetization Reversal in 3D and 2D Dysprosium-Chloranilate-Based Coordination Polymers. Chemistry 2020; 26:8774-8783. [PMID: 32315101 DOI: 10.1002/chem.202000438] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 04/16/2020] [Indexed: 12/26/2022]
Abstract
Herein, two coordination polymers (CPs) [{Dy(Cl2 An)1.5 (CH3 OH)}⋅4.5 H2 O]n (1) and [Dy(Cl2 An)1.5 (DMF)2 ]n (2), in which Cl2 An is chloranilate (2,5-dihydroxy-1,4-benzoquinone dianion), exhibiting field-induced single-molecule magnet behavior with moderate barrier of magnetization reversal are reported. Detailed structural and topological analysis disclosed that 1 has a 3D network, whereas 2 has a 2D layered-type structure. In both CPs, magnetic measurements showed weak antiferromagnetic exchange interaction between the dysprosium centers and field-induced slow magnetic relaxation with barriers of 175(9)K and 145(7)K for 1 and 2, respectively. Notably, the energy barriers of magnetization reversal of 1 and 2 are remarkable for metal-chloranilate-based 3D (1) and 2D (2) CPs. The temperature and field dependence of relaxation time indicate the presence of multiple relaxation pathways, such as direct, quantum tunneling of magnetization, Raman, and Orbach processes, in both CPs. Ab initio theoretical calculations reinforced the experimentally observed higher energy barrier in 1 as compared with 2 due to the presence of large transverse anisotropy in the ground state in the latter. The average transition magnetic moment between the computed low-lying spin-orbit states also rationalized the relaxation as Orbach and Raman processes through the first excited state. BS-DFT calculations were carried out for both CPs to provide more insight into the exchange interaction.
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Affiliation(s)
- Arpan Mondal
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, 462066, Madhya Pradesh, India
| | - Subhadip Roy
- Department of Chemistry, The ICFAI University Tripura, Kamalghat, Mohanpur, Agartala, Tripura, 799210, India
| | - Sanjit Konar
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, 462066, Madhya Pradesh, India
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Ruan L, Tong J, Qin G, Zhou L, Jiao X, Zhang X. Magnetic Modification and the Mechanism of Tb‐Phthalocyanine Single Molecule Magnets Prepared by a High Yield Method. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000253] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Liuxia Ruan
- Key Laboratory for Anisotropy and Texture of Materials Ministry of Education Northeastern University 110819 Shenyang China
- School of Material Science and Engineering Northeastern University 110819 Shenyang China
| | - Junwei Tong
- Key Laboratory for Anisotropy and Texture of Materials Ministry of Education Northeastern University 110819 Shenyang China
- School of Material Science and Engineering Northeastern University 110819 Shenyang China
| | - Gaowu Qin
- Key Laboratory for Anisotropy and Texture of Materials Ministry of Education Northeastern University 110819 Shenyang China
- School of Material Science and Engineering Northeastern University 110819 Shenyang China
| | - Lianqun Zhou
- Suzhou Institute of Biomedical Engineering and Technology Chinese Academy of Sciences 215163 Suzhou China
| | - Xuechen Jiao
- Department of Materials Science and Engineering Monash University Clayton VIC Australia
- Australian Synchrotron Clayton VIC Australia
| | - Xianmin Zhang
- The State Key Lab of Rolling and Automation Northeastern University 110819 Shenyang China
- School of Material Science and Engineering Northeastern University 110819 Shenyang China
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Errulat D, Gabidullin B, Mansikkamäki A, Murugesu M. Two heads are better than one: improving magnetic relaxation in the dysprosium metallocene upon dimerization by use of an exceptionally weakly-coordinating anion. Chem Commun (Camb) 2020; 56:5937-5940. [PMID: 32347247 DOI: 10.1039/d0cc01980a] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Partial metathesis between two weakly-coordinating anions in the archetypical dysprosium metallocene results in the first example of [BPh4]- as a bridging ligand in 4f metals, with a unique η2,η2:η2,η2-bridge. Magnetic susceptibility and relaxation dynamics studies along with ab initio calculations reveal improved slow relaxation of the magnetization in over its mononuclear congener, resulting in an energy barrier of 490 K/340 cm-1 and waist-restricted hysteresis up to 6.5 K.
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Affiliation(s)
- Dylan Errulat
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada.
| | | | | | - Muralee Murugesu
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada.
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59
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Li M, Wu H, Xia Z, Ungur L, Liu D, Chibotaru LF, Ke H, Chen S, Gao S. An Inconspicuous Six-Coordinate Neutral DyIII Single-Ion Magnet with Remarkable Magnetic Anisotropy and Stability. Inorg Chem 2020; 59:7158-7166. [DOI: 10.1021/acs.inorgchem.0c00616] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Min Li
- 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
| | - 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
| | - Zhengqiang Xia
- 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
| | - Liviu Ungur
- Department of Chemistry, National University of Singapore, Block S8 Level 3, 3 Science Drive 3, 117543, Singapore
| | - Dan Liu
- Institute of Flexible Electronics (IFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, China
| | - Liviu F. Chibotaru
- Theory of Nanomaterials Group and Institute of Nanoscale Physics and Chemistry -INPAC, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Hongshan Ke
- 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
| | - 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
| | - Shengli Gao
- 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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60
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A phenoxo-O bridged Dy2 compound showing two-step magnetic relaxation processes behavior. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.107845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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61
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Ding Y, Han T, Zhai Y, Reta D, Chilton NF, Winpenny REP, Zheng Y. A Study of Magnetic Relaxation in Dysprosium(III) Single‐Molecule Magnets. Chemistry 2020; 26:5893-5902. [DOI: 10.1002/chem.202000646] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 02/17/2020] [Indexed: 02/07/2023]
Affiliation(s)
- You‐Song Ding
- Frontier Institute of Science and Technology (FIST)State Key Laboratory for Mechanical Behavior of MaterialsMOE Key Laboratory for Nonequilibrium Synthesis andModulation of Condensed Matter, and School of ScienceXi'an Jiaotong University 99 Yanxiang Road, Xi'an Shaanxi 710054 P.R. China
- Department of ChemistryThe University of Manchester Oxford Road Manchester M13 9PL UK
| | - Tian Han
- Frontier Institute of Science and Technology (FIST)State Key Laboratory for Mechanical Behavior of MaterialsMOE Key Laboratory for Nonequilibrium Synthesis andModulation of Condensed Matter, and School of ScienceXi'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 MaterialsMOE Key Laboratory for Nonequilibrium Synthesis andModulation of Condensed Matter, and School of ScienceXi'an Jiaotong University 99 Yanxiang Road, Xi'an Shaanxi 710054 P.R. China
| | - Daniel Reta
- Department of ChemistryThe University of Manchester Oxford Road Manchester M13 9PL UK
| | - Nicholas F. Chilton
- Department of ChemistryThe University of Manchester Oxford Road Manchester M13 9PL UK
| | | | - Yan‐Zhen Zheng
- Frontier Institute of Science and Technology (FIST)State Key Laboratory for Mechanical Behavior of MaterialsMOE Key Laboratory for Nonequilibrium Synthesis andModulation of Condensed Matter, and School of ScienceXi'an Jiaotong University 99 Yanxiang Road, Xi'an Shaanxi 710054 P.R. China
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Latendresse TP, Vieru V, Upadhyay A, Bhuvanesh NS, Chibotaru LF, Nippe M. Trends in trigonal prismatic Ln-[1]ferrocenophane complexes and discovery of a Ho 3+ single-molecule magnet. Chem Sci 2020; 11:3936-3951. [PMID: 34122864 PMCID: PMC8152809 DOI: 10.1039/d0sc01197e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Lanthanide metallocenophanes are an intriguing class of organometallic complexes that feature rare six-coordinate trigonal prismatic coordination environments of 4f elements with close intramolecular proximity to transition metal ions. Herein, we present a systematic study of the structural and magnetic properties of the ferrocenophanes, [LnFc3(THF)2Li2]−, of the late trivalent lanthanide ions (Ln = Gd (1), Ho (2), Er (3), Tm (4), Yb (5), Lu (6)). One major structural trend within this class of complexes is the increasing diferrocenyl (Fc2−) average twist angle with decreasing ionic radius (rion) of the central Ln ion, resulting in the largest average Fc2− twist angles for the Lu3+ compound 6. Such high sensitivity of the twist angle to changes in rion is unique to the here presented ferrocenophane complexes and likely due to the large trigonal plane separation enforced by the ligand (>3.2 Å). This geometry also allows the non-Kramers ion Ho3+ to exhibit slow magnetic relaxation in the absence of applied dc fields, rendering compound 2 a rare example of a Ho-based single-molecule magnet (SMM) with barriers to magnetization reversal (U) of 110–131 cm−1. In contrast, compounds featuring Ln ions with prolate electron density (3–5) don't show slow magnetization dynamics under the same conditions. The observed trends in magnetic properties of 2–5 are supported by state-of-the-art ab initio calculations. Finally, the magneto-structural relationship of the trigonal prismatic Ho-[1]ferrocenophane motif was further investigated by axial ligand (THF in 2) exchange to yield [HoFc3(THF*)2Li2]− (2-THF*) and [HoFc3(py)2Li2]− (2-py) motifs. We find that larger average Fc2− twist angles (in 2-THF* and 2-py as compared to in 2) result in faster magnetic relaxation times at a given temperature. Lanthanide ferrocenophanes are an intriguing class of organometallic complexes that feature rare six-coordinate trigonal prismatic coordination environments of 4f elements with close intramolecular proximity to iron ions.![]()
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Affiliation(s)
- Trevor P Latendresse
- Department of Chemistry, Texas A&M University 3255 TAMU College Station Texas 77843 USA
| | - Veacheslav Vieru
- Theory of Nanomaterials Group, Katholieke Universiteit Leuven Celestijnenlaan 200F 3001 Leuven Belgium .,Maastricht Science Programme, Faculty of Science and Engineering, Maastricht University Maastricht Netherlands
| | - Apoorva Upadhyay
- Department of Chemistry, Texas A&M University 3255 TAMU College Station Texas 77843 USA .,Department of Chemistry, Wayne State University 5101 Cass Ave Detroit MI 48202 USA
| | - Nattamai S Bhuvanesh
- Department of Chemistry, Texas A&M University 3255 TAMU College Station Texas 77843 USA
| | - Liviu F Chibotaru
- Theory of Nanomaterials Group, Katholieke Universiteit Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Michael Nippe
- Department of Chemistry, Texas A&M University 3255 TAMU College Station Texas 77843 USA
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Zhong L, Chen WB, Li XH, OuYang ZJ, Yang M, Zhang YQ, Gao S, Dong W. Four Dinuclear and One-Dimensional-Chain Dysprosium and Terbium Complexes Based on 2-Hydroxy-3-methoxybenzoic Acid: Structures, Fluorescence, Single-Molecule-Magnet, and Ab Initio Investigation. Inorg Chem 2020; 59:4414-4423. [PMID: 32191444 DOI: 10.1021/acs.inorgchem.9b03555] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The unique electronic configurations of lanthanide(III) ions generate abundant electronic energy levels, resulting in the fantastic magnetic and optical multifunctional properties of lanthanide complexes. Here, 2-hydroxy-3-methoxybenzoic acid (H2MBA) was used to construct four Dy(III) and Tb(III) complexes containing two isostructural dinuclear complexes of [Ln2(HMBA)2(MBA)2(DMF)2(H2O)2]·6H2O [Ln = Dy (1), Tb (2); DMF = N,N-dimethylformamide] and two other isostructural beltlike one-dimensional-chain complexes of [NH4][Ln(HMBA)4] [Ln = Dy (3), Tb (4)]. Fluorescence measurements reveal that H2MBA can sensitize Dy(III) and Tb(III) characteristic luminescence. Furthermore, complex 3 can emit white light under UV-light irradiation originating from a dichromatic mixture of a blue emission of H2MBA and a dominating yellow emission of Dy3+ ions. Magnetic susceptibility measurements show that two Dy(III) complexes are single-molecule magnets with anisotropy barriers of 90(2) and 31(5) cm-1 for 1 and 3, respectively. The magnet-luminescence-structure correlations as well as relaxation pathways are investigated by ab initio calculations and fluorescent spectrometry.
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Affiliation(s)
- Li Zhong
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Wen-Bin Chen
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Xiao-Hui Li
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Zhi-Jian OuYang
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Meng Yang
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Song Gao
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, P. R. China
| | - Wen Dong
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
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Wang J, Zakrzewski JJ, Heczko M, Zychowicz M, Nakagawa K, Nakabayashi K, Sieklucka B, Chorazy S, Ohkoshi SI. Proton Conductive Luminescent Thermometer Based on Near-Infrared Emissive {YbCo 2} Molecular Nanomagnets. J Am Chem Soc 2020; 142:3970-3979. [PMID: 32017548 DOI: 10.1021/jacs.9b13147] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Lanthanide(III)-based coordination complexes have been explored as a source of bifunctional molecular materials combining Single-Molecule Magnet (SMM) behavior with visible-to-near-infrared photoluminescence. In pursuit of more advanced multifunctionality, the next target is to functionalize crystalline solids based on emissive molecular nanomagnets toward high proton conductivity and an efficient luminescent thermometric effect. Here, a unique multifunctional molecule-based material, (H5O2)2(H)[YbIII(hmpa)4][CoIII(CN)6]2·0.2H2O (1, hmpa = hexamethylphosphoramide), composed of molecular {YbCo2}3- anions noncovalently bonded to acidic H5O2+ and H+ ions, is reported. The resulting YbIII complexes present a slow magnetic relaxation below 6 K and room temperature NIR 4f-centered photoluminescence sensitized by [Co(CN)6]3- ions. The microporous framework, built on these emissive magnetic molecules, exhibits a high proton conductivity of the H-hopping mechanism reaching σ of 1.7 × 10-4 S·cm-1 at 97% relative humidity, which classifies 1 as a superionic conductor. Moreover, the emission pattern is strongly temperature-dependent which was utilized in achieving a highly sensitive single-center luminescent thermometer with a relative thermal sensitivity, Sr > 1% K-1 in the 50-175 K range. This work shows an unprecedented combination of magnetic, optical, and electrical functionalities in a single phase working as a proton conductive NIR-emissive thermometer based on Single-Molecule Magnets.
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Affiliation(s)
- Junhao Wang
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Jakub J Zakrzewski
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Michal Heczko
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Mikolaj Zychowicz
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Kosuke Nakagawa
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Koji Nakabayashi
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Barbara Sieklucka
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Szymon Chorazy
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Shin-Ichi Ohkoshi
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
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65
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Smiles DE, Batista ER, Booth CH, Clark DL, Keith JM, Kozimor SA, Martin RL, Minasian SG, Shuh DK, Stieber SCE, Tyliszczak T. The duality of electron localization and covalency in lanthanide and actinide metallocenes. Chem Sci 2020; 11:2796-2809. [PMID: 34084340 PMCID: PMC8157540 DOI: 10.1039/c9sc06114b] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 02/04/2020] [Indexed: 12/14/2022] Open
Abstract
Previous magnetic, spectroscopic, and theoretical studies of cerocene, Ce(C8H8)2, have provided evidence for non-negligible 4f-electron density on Ce and implied that charge transfer from the ligands occurs as a result of covalent bonding. Strong correlations of the localized 4f-electrons to the delocalized ligand π-system result in emergence of Kondo-like behavior and other quantum chemical phenomena that are rarely observed in molecular systems. In this study, Ce(C8H8)2 is analyzed experimentally using carbon K-edge and cerium M5,4-edge X-ray absorption spectroscopies (XAS), and computationally using configuration interaction (CI) calculations and density functional theory (DFT) as well as time-dependent DFT (TDDFT). Both spectroscopic approaches provide strong evidence for ligand → metal electron transfer as a result of Ce 4f and 5d mixing with the occupied C 2p orbitals of the C8H8 2- ligands. Specifically, the Ce M5,4-edge XAS and CI calculations show that the contribution of the 4f1, or Ce3+, configuration to the ground state of Ce(C8H8)2 is similar to strongly correlated materials such as CeRh3 and significantly larger than observed for other formally Ce4+ compounds including CeO2 and CeCl6 2-. Pre-edge features in the experimental and TDDFT-simulated C K-edge XAS provide unequivocal evidence for C 2p and Ce 4f covalent orbital mixing in the δ-antibonding orbitals of e2u symmetry, which are the unoccupied counterparts to the occupied, ligand-based δ-bonding e2u orbitals. The C K-edge peak intensities, which can be compared directly to the C 2p and Ce 4f orbital mixing coefficients determined by DFT, show that covalency in Ce(C8H8)2 is comparable in magnitude to values reported previously for U(C8H8)2. An intuitive model is presented to show how similar covalent contributions to the ground state can have different impacts on the overall stability of f-element metallocenes.
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Affiliation(s)
- Danil E Smiles
- Lawrence Berkeley National Laboratory Berkeley California 94720 USA
| | | | - Corwin H Booth
- Lawrence Berkeley National Laboratory Berkeley California 94720 USA
| | - David L Clark
- Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | | | - Stosh A Kozimor
- Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | | | | | - David K Shuh
- Lawrence Berkeley National Laboratory Berkeley California 94720 USA
| | | | - Tolek Tyliszczak
- Lawrence Berkeley National Laboratory Berkeley California 94720 USA
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66
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Liu MJ, Wu SQ, Li JX, Zhang YQ, Sato O, Kou HZ. Structural Modulation of Fluorescent Rhodamine-Based Dysprosium(III) Single-Molecule Magnets. Inorg Chem 2020; 59:2308-2315. [DOI: 10.1021/acs.inorgchem.9b03105] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Mei-Jiao Liu
- Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
| | - Shu-Qi Wu
- Institute for Materials Chemistry and Engineering and IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Jia-Xin Li
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal 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, P.R. China
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering and IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Hui-Zhong Kou
- Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
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67
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Zhou W, McKearney D, Leznoff DB. Structural Diversity of F-Element Monophthalocyanine Complexes. Chemistry 2020; 26:1027-1031. [PMID: 31922647 DOI: 10.1002/chem.201904535] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 10/29/2019] [Indexed: 11/10/2022]
Abstract
The preparation and structural characterization of a series of lanthanide and uranium(IV) phthalocyanine halide complexes were achieved by reaction of the corresponding metal halide with Li2 Pc. A preliminary survey of their reactivity includes ring reduction of Li(THF)4 [PcUCl3 ] with KC8 leading to the first structurally characterized Pc4- actinide complex, hydrolysis of PcDyCl(DMSO) to PcDyOH(H2 O)3 and preparation of a unique trimeric triangular Li(PcDy)3 (OH)4 (H2 O) cluster.
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Affiliation(s)
- Wen Zhou
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada
| | - Declan McKearney
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada
| | - Daniel B Leznoff
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada
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68
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Duan YY, Wu DF, Chen HH, Wang YJ, Li L, Gao HL, Cui JZ. New dinuclear compounds of dysprosium and erbium constructed by an O-vanillin ligand and β-diketonate coligand: Synthesis, near-Infrared luminescent and magnetism. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119203] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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69
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Canaj AB, Dey S, Wilson C, Céspedes O, Rajaraman G, Murrie M. Engineering macrocyclic high performance pentagonal bipyramidal Dy(iii) single-ion magnets. Chem Commun (Camb) 2020; 56:12037-12040. [DOI: 10.1039/d0cc04559d] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We highlight the vast synthetic scope for macrocyclic engineering of magnetic anisotropy, generating a high performance pentagonal bipyramidal Dy(iii) single-ion magnet where the weak equatorial ligand field is created entirely by using a macrocycle.
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Affiliation(s)
- Angelos B. Canaj
- School of Chemistry
- University of Glasgow
- University Avenue
- Glasgow
- UK
| | - Sourav Dey
- Department of Chemistry
- Indian Institute of Technology Bombay
- Powai
- Mumbai
- India
| | - Claire Wilson
- School of Chemistry
- University of Glasgow
- University Avenue
- Glasgow
- UK
| | - Oscar Céspedes
- School of Physics and Astronomy
- University of Leeds
- Leeds LS2 9JT
- UK
| | - Gopalan Rajaraman
- Department of Chemistry
- Indian Institute of Technology Bombay
- Powai
- Mumbai
- India
| | - Mark Murrie
- School of Chemistry
- University of Glasgow
- University Avenue
- Glasgow
- UK
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70
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Canaj AB, Dey S, Céspedes O, Wilson C, Rajaraman G, Murrie M. There is nothing wrong with being soft: using sulfur ligands to increase axiality in a Dy(iii) single-ion magnet. Chem Commun (Camb) 2020; 56:1533-1536. [DOI: 10.1039/c9cc07292f] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Sulfur co-ligands boost axiality in Dy(iii); computational studies show higher energy barriers when compared to oxygen co-ligands and suggest further improvements by moving to selenium or tellurium co-ligands.
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Affiliation(s)
- Angelos B. Canaj
- School of Chemistry
- University of Glasgow
- University Avenue
- Glasgow
- UK
| | - Sourav Dey
- Department of Chemistry, Indian Institute of Technology Bombay
- Mumbai
- India
| | - Oscar Céspedes
- School of Physics and Astronomy
- University of Leeds
- Leeds LS2 9JT
- UK
| | - Claire Wilson
- School of Chemistry
- University of Glasgow
- University Avenue
- Glasgow
- UK
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay
- Mumbai
- India
| | - Mark Murrie
- School of Chemistry
- University of Glasgow
- University Avenue
- Glasgow
- UK
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71
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Castro-Alvarez A, Gil Y, Llanos L, Aravena D. High performance single-molecule magnets, Orbach or Raman relaxation suppression? Inorg Chem Front 2020. [DOI: 10.1039/d0qi00487a] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Relaxation mechanisms limiting the blocking temperature for high-performance single molecule magnets (SMMs) are investigated. Best SMMs are limited by the exponential regime. Current ab initio methods can yield accurate estimations for this limit.
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Affiliation(s)
- Alejandro Castro-Alvarez
- Departamento de Química de los Materiales
- Facultad de Química y Biología
- Universidad de Santiago de Chile
- Santiago
- Chile
| | - Yolimar Gil
- Departamento de Química Inorgánica y Analítica
- Facultad de Ciencias Químicas y Farmacéuticas
- Universidad de Chile
- Santiago
- Chile
| | - Leonel Llanos
- Departamento de Química de los Materiales
- Facultad de Química y Biología
- Universidad de Santiago de Chile
- Santiago
- Chile
| | - Daniel Aravena
- Departamento de Química de los Materiales
- Facultad de Química y Biología
- Universidad de Santiago de Chile
- Santiago
- Chile
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72
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Wu SG, Zhan CY, Huang GZ, Ruan ZY, Liu JL, Tong ML. Slow magnetic dynamics in centrosymmetric didysprosium and equilateral triangular tridysprosium molecules. Dalton Trans 2020; 49:4164-4171. [DOI: 10.1039/d0dt00481b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Slow magnetic dynamics were investigated in centrosymmetric didysprosium and equilateral triangular tridysprosium molecules.
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Affiliation(s)
- Si-Guo Wu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- 510275 Guangzhou
- P. R. China
| | - Chang-Ye Zhan
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- 510275 Guangzhou
- P. R. China
| | - Guo-Zhang Huang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- 510275 Guangzhou
- P. R. China
| | - Ze-Yu Ruan
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- 510275 Guangzhou
- P. R. China
| | - Jun-Liang Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- 510275 Guangzhou
- P. R. China
| | - Ming-Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- 510275 Guangzhou
- P. R. China
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73
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Díaz-Ortega IF, Herrera JM, Dey S, Nojiri H, Rajaraman G, Colacio E. The effect of the electronic structure and flexibility of the counteranions on magnetization relaxation in [Dy(L)2(H2O)5]3+ (L = phosphine oxide derivative) pentagonal bipyramidal SIMs. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01412h] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The effects of the electronic structure and flexibility of triflate anions in a new high-Ueff TBPY-7 SMM, [Dy(OPCy3)2(H2O)5](CF3SO3)3·2OPCy3, have been analyzed.
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Affiliation(s)
- Ismael F. Díaz-Ortega
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- Granada
- Spain
| | - Juan Manuel Herrera
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- Granada
- Spain
| | - Sourav Dey
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Hiroyuki Nojiri
- Institute for Materials Research
- Tohoku University
- Sendai
- Japan
| | - Gopalan Rajaraman
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Enrique Colacio
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- Granada
- Spain
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74
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Yin B, Li CC. A method to predict both the relaxation time of quantum tunneling of magnetization and the effective barrier of magnetic reversal for a Kramers single-ion magnet. Phys Chem Chem Phys 2020; 22:9923-9933. [DOI: 10.1039/d0cp00933d] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A method to predict the relaxation time of quantum tunneling of magnetization and the magnetic reversal barrier with efficiency and reliability.
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Affiliation(s)
- Bing Yin
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi'an
- P. R. China
| | - Chao-Chao Li
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi'an
- P. R. China
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75
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Shukla P, Ansari KU, Gao C, Vaidya S, Tripathi S, Kumar P, Butcher RJ, Overgaard J, Shanmugam M. Influence of anion induced geometry change in Zn(ii) on the magnetization relaxation dynamics of Dy(iii) in Zn–Dy–Zn complexes. Dalton Trans 2020; 49:10580-10593. [DOI: 10.1039/d0dt00949k] [Citation(s) in RCA: 5] [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 [Zn2Dy(L1)2(OAc)4](X) where X = (NO3)0.92(Br)0.08 (1), ClO4 (2), Cl (3) and PF6 (4) complexes were synthesized and their dc and ac magnetic data investigated. Experimental results are validated through MOLCAS calculations.
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Affiliation(s)
- Pragya Shukla
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India
| | | | - Chen Gao
- Department of Chemistry and CMC
- Aarhus University
- Aarhus C
- Denmark
| | - Shefali Vaidya
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India
| | - Shalini Tripathi
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India
| | - Pardeep Kumar
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India
| | | | - Jacob Overgaard
- Department of Chemistry and CMC
- Aarhus University
- Aarhus C
- Denmark
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76
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Chen WB, Zhong L, Zhong YJ, Zhang YQ, Gao S, Dong W. Understanding the near-infrared fluorescence and field-induced single-molecule-magnetic properties of dinuclear and one-dimensional-chain ytterbium complexes based on 2-hydroxy-3-methoxybenzoic acid. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00628a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Two Yb(iii) complexes with a dinuclear and belt-like one-dimensional chain structure were reported. Their near-infrared luminescence and single-molecule magnetic properties were investigated in detail.
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Affiliation(s)
- Wen-Bin Chen
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou 510006
- P. R. China
| | - Li Zhong
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou 510006
- P. R. China
| | - Yun-Jing Zhong
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou 510006
- P. R. China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- P. R. China
| | - Song Gao
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- P. R. China
| | - Wen Dong
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou 510006
- P. R. China
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77
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Yu KX, Ding YS, Zhai YQ, Han T, Zheng YZ. Equatorial coordination optimization for enhanced axiality of mononuclear Dy(iii) single-molecule magnets. Dalton Trans 2020; 49:3222-3227. [DOI: 10.1039/d0dt00011f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The optimization of equatorial sites leads to significant improvement of the magnetic properties of Dy(iii) SMMs.
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Affiliation(s)
- Ke-Xin Yu
- Frontier Institute of Science and Technology (FIST)
- School of Science
- Research Institute of Xi'an Jiaotong University (Zhejiang)
- State Key Laboratory of Mechanical Behavior for Materials
- MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter
| | - You-Song Ding
- Frontier Institute of Science and Technology (FIST)
- School of Science
- Research Institute of Xi'an Jiaotong University (Zhejiang)
- State Key Laboratory of Mechanical Behavior for Materials
- MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter
| | - Yuan-Qi Zhai
- Frontier Institute of Science and Technology (FIST)
- School of Science
- Research Institute of Xi'an Jiaotong University (Zhejiang)
- State Key Laboratory of Mechanical Behavior for Materials
- MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter
| | - Tian Han
- Frontier Institute of Science and Technology (FIST)
- School of Science
- Research Institute of Xi'an Jiaotong University (Zhejiang)
- State Key Laboratory of Mechanical Behavior for Materials
- MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter
| | - Yan-Zhen Zheng
- Frontier Institute of Science and Technology (FIST)
- School of Science
- Research Institute of Xi'an Jiaotong University (Zhejiang)
- State Key Laboratory of Mechanical Behavior for Materials
- MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter
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78
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Harriman KLM, Murillo J, Suturina EA, Fortier S, Murugesu M. Relaxation dynamics in see-saw shaped Dy(iii) single-molecule magnets. Inorg Chem Front 2020. [DOI: 10.1039/d0qi01007c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unusual see-saw shaped Dy(iii) single-molecule magnets, [K(DME)n][LArDy(X)2] (LAr = {C6H4[(2,6-iPrC6H3)NC6H4]2}2−), X = Cl (1) and X = I (2) were synthesized and display high effective energy barriers (Ueff = 1278–1334 K) in zero field.
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Affiliation(s)
- Katie L. M. Harriman
- Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| | - Jesse Murillo
- Department of Chemistry and Biochemistry
- University of Texas at El Paso
- El Paso
- USA
| | | | - Skye Fortier
- Department of Chemistry and Biochemistry
- University of Texas at El Paso
- El Paso
- USA
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
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79
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Wang WM, Huai L, Wang XW, Jiang KJ, Shen HY, Gao HL, Fang M, Cui JZ. Structures, magnetic refrigeration and single molecule-magnet behavior of five rhombus-shaped tetranuclear Ln(iii)-based clusters. NEW J CHEM 2020. [DOI: 10.1039/d0nj01969k] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The rhombus-shaped Gd4 cluster displays a magnetic refrigeration property, and the Dy4 cluster shows remarkable SMM behavior.
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Affiliation(s)
- Wen-Min Wang
- Department of Chemistry
- Taiyuan Normal University
- Jinzhong 030619
- China
- Department of Chemistry
| | - Lei Huai
- Department of Chemistry
- Taiyuan Normal University
- Jinzhong 030619
- China
| | - Xi-Wen Wang
- Department of Chemistry
- Taiyuan Normal University
- Jinzhong 030619
- China
| | - Kai-Jun Jiang
- Department of Chemistry
- Tianjin University
- Tianjin
- China
| | - Hai-Yun Shen
- Department of Chemistry
- Tianjin University
- Tianjin
- China
| | - Hong-Ling Gao
- Department of Chemistry
- Tianjin University
- Tianjin
- China
| | - Ming Fang
- Department of Chemistry
- Hebei Normal University of Science & Technology
- Qinhuangdao 066004
- China
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80
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In silico design of pseudo D5h actinide based molecular magnets: role of covalency in magnetic anisotropy. J CHEM SCI 2019. [DOI: 10.1007/s12039-019-1705-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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81
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Xin Y, Wang J, Zychowicz M, Zakrzewski JJ, Nakabayashi K, Sieklucka B, Chorazy S, Ohkoshi SI. Dehydration-Hydration Switching of Single-Molecule Magnet Behavior and Visible Photoluminescence in a Cyanido-Bridged Dy IIICo III Framework. J Am Chem Soc 2019; 141:18211-18220. [PMID: 31626543 DOI: 10.1021/jacs.9b09103] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Microporous magnets compose a class of multifunctional molecule-based materials where desolvation-driven structural transformation leads to the switching of magnetic properties. Herein, we present a special type of microporous magnet where a dehydration-hydration process within a bimetal coordination framework results in the switching of emissive DyIII single-molecule magnets (SMMs). We report a three-dimensional (3-D) cyanido-bridged coordination polymer, {[DyIII(H2O)2][CoIII(CN)6]}·2.2H2O (1), and its dehydrated form of {DyIII[CoIII(CN)6]} (2), which was obtained through a reversible single-crystal-to-single-crystal transformation. Both phases are composed of paramagnetic DyIII centers alternately arranged with diamagnetic hexacyanidocobaltates(III). The hydrated phase contains eight-coordinated [DyIII(μ-NC)6(H2O)2]3- complexes of a square antiprism geometry, while the dehydrated form contains six-coordinated [DyIII(μ-NC)6]3- moieties of a trigonal prism geometry. This change in coordination geometry results in the generation of DyIII single-molecule magnets in 2, whereas slow magnetic relaxation effect is not observed for DyIII sites in 1. The D4d-to-D3h symmetry change of DyIII complexes produces also the shift of photoluminescent color from nearly white to deep yellow thanks to the modulation of emission bands of f-f electronic transitions. A combined approach utilizing dc magnetic data and low-temperature emission spectra confirmed an axial crystal field of trigonal prismatic DyIII complexes in 2, which produces an Orbach type of slow magnetic relaxation. Therefore, we present a unique route to the efficient switching of SMM behavior and photoluminescence of DyIII complexes embedded in a 3-D cyanido-bridged framework.
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Affiliation(s)
- Yue Xin
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan
| | - Junhao Wang
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan
| | - Mikolaj Zychowicz
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Jakub J Zakrzewski
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Koji Nakabayashi
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan
| | - Barbara Sieklucka
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Szymon Chorazy
- Faculty of Chemistry , Jagiellonian University , Gronostajowa 2 , 30-387 Kraków , Poland
| | - Shin-Ichi Ohkoshi
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan
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82
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Canaj AB, Dey S, Martí ER, Wilson C, Rajaraman G, Murrie M. Insight into D 6h Symmetry: Targeting Strong Axiality in Stable Dysprosium(III) Hexagonal Bipyramidal Single-Ion Magnets. Angew Chem Int Ed Engl 2019; 58:14146-14151. [PMID: 31343095 PMCID: PMC6790654 DOI: 10.1002/anie.201907686] [Citation(s) in RCA: 117] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Indexed: 11/24/2022]
Abstract
Following a novel synthetic strategy where the strong uniaxial ligand field generated by the Ph3 SiO- (Ph3 SiO- =anion of triphenylsilanol) and the 2,4-di-t Bu-PhO- (2,4-di-t Bu-PhO- =anion of 2,4-di-tertbutylphenol) ligands combined with the weak equatorial field of the ligand LN6 , leads to [DyIII (LN6 )(2,4-di-t Bu-PhO)2 ](PF6 ) (1), [DyIII (LN6 )(Ph3 SiO)2 ](PF6 ) (2) and [DyIII (LN6 )(Ph3 SiO)2 ](BPh4 ) (3) hexagonal bipyramidal dysprosium(III) single-molecule magnets (SMMs) with high anisotropy barriers of Ueff =973 K for 1, Ueff =1080 K for 2 and Ueff =1124 K for 3 under zero applied dc field. Ab initio calculations predict that the dominant magnetization reversal barrier of these complexes expands up to the 3rd Kramers doublet, thus revealing for the first time the exceptional uniaxial magnetic anisotropy that even the six equatorial donor atoms fail to negate, opening up the possibility to other higher-order symmetry SMMs.
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Affiliation(s)
- Angelos B. Canaj
- WestCHEMSchool of ChemistryUniversity of GlasgowUniversity AvenueGlasgowG12 8QQUK
| | - Sourav Dey
- Department of ChemistryIndian Institute of Technology Bombay, PowaiMumbaiMaharashtra400076India
| | - Emma Regincós Martí
- WestCHEMSchool of ChemistryUniversity of GlasgowUniversity AvenueGlasgowG12 8QQUK
| | - Claire Wilson
- WestCHEMSchool of ChemistryUniversity of GlasgowUniversity AvenueGlasgowG12 8QQUK
| | - Gopalan Rajaraman
- Department of ChemistryIndian Institute of Technology Bombay, PowaiMumbaiMaharashtra400076India
| | - Mark Murrie
- WestCHEMSchool of ChemistryUniversity of GlasgowUniversity AvenueGlasgowG12 8QQUK
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83
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Canaj AB, Dey S, Martí ER, Wilson C, Rajaraman G, Murrie M. Insight into
D
6
h
Symmetry: Targeting Strong Axiality in Stable Dysprosium(III) Hexagonal Bipyramidal Single‐Ion Magnets. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907686] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Angelos B. Canaj
- WestCHEM School of Chemistry University of Glasgow University Avenue Glasgow G12 8QQ UK
| | - Sourav Dey
- Department of Chemistry Indian Institute of Technology Bombay, Powai Mumbai Maharashtra 400076 India
| | - Emma Regincós Martí
- WestCHEM School of Chemistry University of Glasgow University Avenue Glasgow G12 8QQ UK
| | - Claire Wilson
- WestCHEM School of Chemistry University of Glasgow University Avenue Glasgow G12 8QQ UK
| | - Gopalan Rajaraman
- Department of Chemistry Indian Institute of Technology Bombay, Powai Mumbai Maharashtra 400076 India
| | - Mark Murrie
- WestCHEM School of Chemistry University of Glasgow University Avenue Glasgow G12 8QQ UK
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84
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Schlesier C, Liu F, Dubrovin V, Spree L, Büchner B, Avdoshenko SM, Popov AA. Mixed dysprosium-lanthanide nitride clusterfullerenes DyM 2N@C 80-I h and Dy 2MN@C 80-I h (M = Gd, Er, Tm, and Lu): synthesis, molecular structure, and quantum motion of the endohedral nitrogen atom. NANOSCALE 2019; 11:13139-13153. [PMID: 31268459 DOI: 10.1039/c9nr03593a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Systematic exploration of the synthesis of mixed-metal Dy-M nitride clusterfullerenes (NCFs, M = Gd, Er, Tm, Lu) is performed, and the impact of the second metal on the relative yield is evaluated. We demonstrate that the ionic radius of the metal appears to be the main factor allowing explanation of the relative yields in Dy-M mixed-metal systems with M = Sc, Lu, Er, and Gd. At the same time, Dy-Tm NCFs show anomalously low yields, which is not consistent with the relatively small ionic radius of Tm3+ but can be explained by the high third ionization potential of Tm. Complete separation of Dy-Gd and Dy-Er, as well as partial separation of Dy-Lu M3N@C80 nitride clusterfullerenes, is accomplished by recycling HPLC. The molecular structures of DyGd2N@C80 and DyEr2N@C80 are analyzed by means of single-crystal X-ray diffraction. A remarkable ordering of mixed-metal nitride clusters is found despite similar size and electronic properties of the metals. Possible pyramidalization of the nitride clusters in these and other nitride clusterfullerenes is critically analyzed with the help of DFT calculations and reconstruction of the nitrogen inversion barrier in M3N@C80 molecules is performed. Although a double-well potential with a pyramidal cluster structure is found to be common for most of them, the small size of the inversion barrier often leads to an apparent planar structure of the cluster. This situation is found for those M3N@C80 molecules in which the energy of the lowest vibrational level exceeds that of the inversion barrier, including Dy3N@C80 and DyEr2N@C80. The genuine pyramidal structure can be observed by X-ray diffraction only when the lowest vibrational level is below the inversion barrier, such as those found in Gd3N@C80 and DyGd2N@C80. The quantum nature of molecular vibrations becomes especially apparent when the size of the inversion barrier is comparable to the energy of the lowest vibrational levels.
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Affiliation(s)
- C Schlesier
- Leibniz Institute for Solid State and Materials Research (IFW Dresden), Helmholtzstrasse 20, 01069 Dresden, Germany.
| | - F Liu
- Leibniz Institute for Solid State and Materials Research (IFW Dresden), Helmholtzstrasse 20, 01069 Dresden, Germany.
| | - V Dubrovin
- Leibniz Institute for Solid State and Materials Research (IFW Dresden), Helmholtzstrasse 20, 01069 Dresden, Germany.
| | - L Spree
- Leibniz Institute for Solid State and Materials Research (IFW Dresden), Helmholtzstrasse 20, 01069 Dresden, Germany.
| | - B Büchner
- Leibniz Institute for Solid State and Materials Research (IFW Dresden), Helmholtzstrasse 20, 01069 Dresden, Germany.
| | - S M Avdoshenko
- Leibniz Institute for Solid State and Materials Research (IFW Dresden), Helmholtzstrasse 20, 01069 Dresden, Germany.
| | - A A Popov
- Leibniz Institute for Solid State and Materials Research (IFW Dresden), Helmholtzstrasse 20, 01069 Dresden, Germany.
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85
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Harriman KL, Errulat D, Murugesu M. Magnetic Axiality: Design Principles from Molecules to Materials. TRENDS IN CHEMISTRY 2019. [DOI: 10.1016/j.trechm.2019.04.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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86
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Xia QY, Feng MY, Ma DX, Shi SM, Xie YC, Tian W, Shi HJ, Wang QL, Wang WM. Structures, luminescent properties and magnetic refrigeration of two series of Ln2III compounds. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.03.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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87
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Liu P, Li C, Yuan WJ. Modulating dynamic magnetic behaviors of dysprosium(III) dinuclear compounds based on a Schiff base-like ligand by using two different β-diketone coligands. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.02.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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88
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Greenough J, Zhou Z, Wei Z, Petrukhina MA. Versatility of cyclooctatetraenyl ligands in rare earth metal complexes of the [M 2(COT) 3(THF) 2] (M = Y and La) type. Dalton Trans 2019; 48:5614-5620. [PMID: 30958499 DOI: 10.1039/c9dt00868c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Two new organometallic cyclooctatetraenyl complexes of the type [M2(COT)3(THF)2] (M = Y and La) have been prepared, using optimized synthetic procedures, and fully characterized by X-ray diffraction analysis, IR and 1H NMR spectroscopies. The structures can be represented as formed by the double-decker [M(COT)2]- anion with an asymmetrically bound cationic [M(COT)(THF)2]+ unit. The COT rings in the anionic sandwich are not equidistant from the metal with the M-COTcentroid distances measuring at 1.991(5) Å and 2.074(5) Å for [Y(COT)2]-vs. 2.045(4) Å and 2.154(5) Å for [La(COT)2]-. The sandwich fragments are η2-coordinated to the second metal center with the average M-C distances of 2.837(4) Å and 2.879(5) Å for yttrium and lanthanum complexes, respectively. The M-COTcentroid distances in the cationic unit are 1.962(4) Å for the former and 2.009(2) Å for the latter.
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Affiliation(s)
- Joshua Greenough
- Department of Chemistry, University at Albany, State University of New York, Albany, NY 12222, USA.
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89
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Xie SF, Huang LQ, Zhong L, Lai BL, Yang M, Chen WB, Zhang YQ, Dong W. Structures, Single-Molecule Magnets, and Fluorescent Properties of Four Dinuclear Lanthanide Complexes Based on 4-Azotriazolyl-3-hydroxy-2-naphthoic Acid. Inorg Chem 2019; 58:5914-5921. [DOI: 10.1021/acs.inorgchem.9b00260] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Shang-Fang Xie
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Li-Qian Huang
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Li Zhong
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Bi-Lin Lai
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Meng Yang
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Wen-Bin Chen
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Wen Dong
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China
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90
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Kalita P, Malakar A, Goura J, Nayak S, Herrera JM, Colacio E, Chandrasekhar V. Mononuclear lanthanide complexes assembled from a tridentate NNO donor ligand: design of a Dy III single-ion magnet. Dalton Trans 2019; 48:4857-4866. [PMID: 30869724 DOI: 10.1039/c9dt00504h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of a tridentate NNO donor ligand, 4-nitro-2-((2-(pyridine-2-yl)hydrazono)methyl)phenol (HL) with lanthanide(iii) nitrates in the presence of triethylamine afforded a new family of neutral mononuclear LnIII complexes [Ln(NO3)(L)2(HOCH3)] (Ln = Gd; (1) Tb; (2), Dy; (3), and Ho (4). The mononuclear complexes were structurally characterized by single crystal X-ray diffraction studies which revealed a spherical tricapped trigonal prism geometry with a pseudo D3h symmetry around the LnIII centre. Static (dc) and dynamic (ac) magnetic studies have been performed on these complexes. Field-induced single-ion magnet behaviour was observed in the DyIII analogue with an effective energy barrier and an pre-exponential factor of Δ/kB = 68(2) K and τ0 = 1.8 × 10-7 s, respectively.
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Affiliation(s)
- Pankaj Kalita
- School of Chemical Sciences, National Institute of Science Education and Research Bhubaneswar, HBNI, Jatni, Khurda - 752050, Odisha, India.
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91
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Roemer M, Wild DA, Sobolev AN, Skelton BW, Nealon GL, Piggott MJ, Koutsantonis GA. Carbon-Rich Trinuclear Octamethylferrocenophanes. Inorg Chem 2019; 58:3789-3799. [DOI: 10.1021/acs.inorgchem.8b03389] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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92
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Solvent-induced two Dy2 compounds with different structures showing distinct slow magnetization relaxation behaviors. Polyhedron 2019. [DOI: 10.1016/j.poly.2018.12.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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93
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Aulakh D, Liu L, Varghese JR, Xie H, Islamoglu T, Duell K, Kung CW, Hsiung CE, Zhang Y, Drout RJ, Farha OK, Dunbar KR, Han Y, Wriedt M. Direct Imaging of Isolated Single-Molecule Magnets in Metal-Organic Frameworks. J Am Chem Soc 2019; 141:2997-3005. [PMID: 30640459 DOI: 10.1021/jacs.8b11374] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Practical applications involving the magnetic bistability of single-molecule magnets (SMMs) for next-generation computer technologies require nanostructuring, organization, and protection of nanoscale materials in two- or three-dimensional networks, to enable read-and-write processes. Owing to their porous nature and structural long-range order, metal-organic frameworks (MOFs) have been proposed as hosts to facilitate these efforts. Although probing the channels of MOF composites using indirect methods is well established, the use of direct methods to elucidate fundamental structural information is still lacking. Herein we report the direct imaging of SMMs encapsulated in a mesoporous MOF matrix using high-resolution transmission electron microscopy. These images deliver, for the first time, direct and unambiguous evidence to support the adsorption of molecular guests within the porous host. Bulk magnetic measurements further support the successful nanostructuring of SMMs. The preparation of the first magnetic composite thin films of this kind furthers the development of molecular spintronics.
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Affiliation(s)
- Darpandeep Aulakh
- Department of Chemistry & Biomolecular Science , Clarkson University , Potsdam , New York 13699 , United States
| | - Lingmei Liu
- Advanced Membranes and Porous Materials Center, Physical Sciences and Engineering Division , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Saudi Arabia
| | - Juby R Varghese
- Department of Chemistry & Biomolecular Science , Clarkson University , Potsdam , New York 13699 , United States
| | - Haomiao Xie
- Department of Chemistry , Texas A&M University , College Station , Texas 77845 , United States
| | - Timur Islamoglu
- Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
| | - Kyle Duell
- Department of Chemistry & Biomolecular Science , Clarkson University , Potsdam , New York 13699 , United States
| | - Chung-Wei Kung
- Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
| | - Chia-En Hsiung
- Advanced Membranes and Porous Materials Center, Physical Sciences and Engineering Division , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Saudi Arabia
| | - Yuxin Zhang
- Multi-Scale Porous Materials Center, Institute of Advanced Interdisciplinary Studies & College of Materials Science and Engineering , Chongqing University , Chongqing 400044 , People's Republic of China
| | - Riki J Drout
- Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
| | - Omar K Farha
- Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
| | - Kim R Dunbar
- Department of Chemistry , Texas A&M University , College Station , Texas 77845 , United States
| | - Yu Han
- Advanced Membranes and Porous Materials Center, Physical Sciences and Engineering Division , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Saudi Arabia
| | - Mario Wriedt
- Department of Chemistry & Biomolecular Science , Clarkson University , Potsdam , New York 13699 , United States
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94
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Gou J, Liu S, Wang YJ, Li L, Ren P, Gao HL, Cui JZ. Tetranuclear rare-earth complexes: energy barrier enhancement and two-step slow magnetic relaxation activated by ligand substitution. Inorg Chem Front 2019. [DOI: 10.1039/c8qi01309h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The influence of tuning the β-diketone on the modulation of the magnetic properties is demonstrated.
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Affiliation(s)
- Jian Gou
- Department of Chemistry
- Tianjin University
- Tianjin
- China
| | - Shuang Liu
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
- Nankai University
- Tianjin
- China
| | - Yun-Juan Wang
- Department of Chemistry
- Tianjin University
- Tianjin
- China
| | - Ling Li
- Department of Chemistry
- Tianjin University
- Tianjin
- China
| | - Peng Ren
- School of Science
- Harbin Institute of Technology (Shenzhen)
- Shenzhen
- China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
| | - Hong-Ling Gao
- Department of Chemistry
- Tianjin University
- Tianjin
- China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
| | - Jian-Zhong Cui
- Department of Chemistry
- Tianjin University
- Tianjin
- China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
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95
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Li LL, Su HD, Liu S, Xu YC, Wang WZ. A new air- and moisture-stable pentagonal-bipyramidal DyIII single-ion magnet based on the HMPA ligand. Dalton Trans 2019; 48:2213-2219. [DOI: 10.1039/c8dt03565b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new pentagonal-bipyramidal DyIII SIM was obtained with HMPA ligand, which is stable to air and moisture and shows slow relaxation of magnetization up to 36 K (1000 Hz) with Ueff of 556 K.
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Affiliation(s)
- Lei-Lei Li
- School of Chemistry and Chemical Engineering
- Xi'an Shiyou University
- Xi'an 710065
- China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
| | - Hong-Dan Su
- School of Chemistry and Chemical Engineering
- Xi'an Shiyou University
- Xi'an 710065
- China
| | - Shuang Liu
- School of Chemistry and Chemical Engineering
- Xi'an Shiyou University
- Xi'an 710065
- China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)
| | - Ya-Chao Xu
- School of Chemistry and Chemical Engineering
- Xi'an Shiyou University
- Xi'an 710065
- China
| | - Wen-Zhen Wang
- School of Chemistry and Chemical Engineering
- Xi'an Shiyou University
- Xi'an 710065
- China
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96
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Canaj AB, Singh MK, Regincós Marti E, Damjanović M, Wilson C, Céspedes O, Wernsdorfer W, Rajaraman G, Murrie M. Boosting axiality in stable high-coordinate Dy(iii) single-molecule magnets. Chem Commun (Camb) 2019; 55:5950-5953. [PMID: 31049540 DOI: 10.1039/c9cc00965e] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new nine-coordinate, air-stable Dy(iii) single-ion magnet has been successfully isolated. Our in silico studies demonstrate that through carefully modulating the ligand electronics, the axiality can be boosted to generate Ucal barriers of over 600 K.
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Affiliation(s)
- Angelos B Canaj
- WestCHEM, School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK.
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97
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Bala S, Huang GZ, Ruan ZY, Wu SG, Liu Y, Wang LF, Liu JL, Tong ML. A square antiprism dysprosium single-ion magnet with an energy barrier over 900 K. Chem Commun (Camb) 2019; 55:9939-9942. [DOI: 10.1039/c9cc05135j] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A stable and high-performance molecule displays a reversal barrier >900 K, which is the highest among square antiprismatic dysprosium single-ion magnets.
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Affiliation(s)
- Sukhen Bala
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Guo-Zhang Huang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Ze-Yu Ruan
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Si-Guo Wu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Yang Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Long-Fei Wang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Jun-Liang Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
| | - Ming-Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- P. R. China
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98
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Wang HS, Yin CL, Hu ZB, Chen Y, Pan ZQ, Song Y, Zhang YQ, Zhang ZC. Regulation of magnetic relaxation behavior by replacing 3d transition metal ions in [M2Dy2] complexes containing two different organic chelating ligands. Dalton Trans 2019; 48:10011-10022. [DOI: 10.1039/c9dt00774a] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Two [MIII2DyIII2] complexes (M = Fe for 1 and Co for 2) with mixed organic ligands were obtained. Complex 2 exhibits single molecule magnet behavior with Ueff = 64.0(9) K.
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Affiliation(s)
- Hui-Sheng Wang
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
| | - Cheng-Ling Yin
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
| | - Zhao-Bo Hu
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210046
| | - Yong Chen
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
| | - Zhi-Quan Pan
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
| | - You Song
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210046
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- China
| | - Zai-Chao Zhang
- Jiangsu Key Laboratory for the Chemistry of Low-dimensional Materials
- School of Chemistry and Chemical Engineering
- Huaiyin Normal University
- P. R. China
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99
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Giansiracusa MJ, Kostopoulos AK, Collison D, Winpenny REP, Chilton NF. Correlating blocking temperatures with relaxation mechanisms in monometallic single-molecule magnets with high energy barriers (Ueff > 600 K). Chem Commun (Camb) 2019; 55:7025-7028. [DOI: 10.1039/c9cc02421b] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Correlating blocking temperatures with relaxation mechanisms in single-molecule magnets.
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Affiliation(s)
| | | | - David Collison
- The School of Chemistry
- The University of Manchester Oxford Road
- Manchester
- UK
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100
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Cador O, Le Guennic B, Pointillart F. Electro-activity and magnetic switching in lanthanide-based single-molecule magnets. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00875f] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present work reviews switching of single-molecule magnetic behaviour achieved through various stimuli such as temperature, light irradiation, redox processes, solvation/desolvation, and magnetic field.
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Affiliation(s)
- Olivier Cador
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226
- F-35000 Rennes
- France
| | - Boris Le Guennic
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226
- F-35000 Rennes
- France
| | - Fabrice Pointillart
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226
- F-35000 Rennes
- France
| |
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