1
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Wang Y, Zeng Z, Luo S, Guo Y, Liu X. Enhancing the single-molecule magnetic performance of β-diketonate Dy(III) complexes by modulating the coordination microenvironment and magnetic interaction: from a mononuclear to a dinuclear structure. Dalton Trans 2024. [PMID: 39370881 DOI: 10.1039/d4dt02179g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/08/2024]
Abstract
Based on a β-diketonate ligand, a mononuclear Dy(III) complex, [Dy(dmpd)3(bpy)] (1) (dmpd = 4,4-dimethyl-1-phenylpentane-1,3-dione, bpy = 2,2'-dipyridyl), of [DyN2O6] type has been synthesized with a capping nitrogen-containing coligand. Then, a dual capping coligand 2,2'-bipyrimidine (bmp) is introduced to be a bridge to link two β-diketonate-Dy(III) motifs, leading to a new dinuclear Dy(III) complex, [Dy2(dmpd)6(bmp)] (2). Dy(III) centers in both complexes feature an N2O6 octacoordinated environment with an approximate square-antiprism geometry (D4d). Without a dc field, the SMM behaviour is absent in complex 1, but can be clearly observed in dinuclear 2 with a Ueff of 87.29 K. The significantly improved magnetism arising in 2 is mainly due to the modulation of the coordination environment around the Dy(III) ions and the superexchange magnetic interactions inside the dinuclear units, thus allowing for the effective inhibition of the quantum tunneling of magnetization at low temperatures and promotion of the uniaxial magnetic anisotropy. For 1, a diamagnetic Y(III) analogue [Y(dmpd)3(bpy)] (3) and diluted sample 1@Y were constructed to further perform the dilution experiment, coupled with theoretical calculations further supporting that the synergetic contributions of intermolecular dipole-dipole interactions, intramolecular coupling and uniaxial magnetic anisotropy cause the enhancement of dynamic magnetic relaxation.
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Affiliation(s)
- Yafu Wang
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China.
| | - Zhaopeng Zeng
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China.
- Xinhua College of Ningxia University, Yinchuan 750021, China
| | - Shuchang Luo
- College of Chemical Engineering, Guizhou University of Engineering Science, Bijie 551700, China.
| | - Yan Guo
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China.
| | - Xiangyu Liu
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China.
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2
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Selikhov AN, Félix G, Lyubov DM, Nelyubina YV, Cherkasov AV, Sene S, Taydakov IV, Metlin MT, Tyutyunov AA, Guari Y, Larionova J, Trifonov AA. Luminescent Er 3+ based single molecule magnets with fluorinated alkoxide or aryloxide ligands. Dalton Trans 2024; 53:6352-6366. [PMID: 38488577 DOI: 10.1039/d3dt04375d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
We report the synthesis, structures, and magnetic and luminescence properties of a series of new mono- and dinuclear Er3+ complexes derived from sterically demanding aryloxide and fluorinated alkoxide ligands: [4-tBu-2,6-(Ph2CH)2C6H2O]3Er(THF) (1), [(C6F5)3CO]3Er(Me3SiOH) (2), [(C6F5)3CO]3Er[(Me3Si)2NH] (3), [(C6F5)3CO]3Er(C6H5CH3) (4), [(C6F5)3CO]3Er(o-Me2NC6H4CH3) (5) and {[Ph(CF3)2CO]2Er(μ2-OC(CF3)2Ph)}2 (6). In compounds 1, 2, and 4, the Er3+ ion is four-coordinated and adopts a distorted trigonal pyramidal geometry, while in 3, 5, and 6, the coordination geometry of Er3+ is impacted by the presence of several relatively short Er⋯F distances, making them rather 6-coordinated. All compounds behave as field-induced Single Molecule Magnets (SMMs) and exhibit an Er3+ characteristic near infrared (NIR) emission associated with the 4I13/2 → 4I15/2 transition with a remarkably long lifetime going up to 73 μs, which makes them multifunctional luminescent SMMs. The deconvolution of the NIR emission spectra allowed us to provide a direct probe of the crystal field splitting in these compounds, which was correlated with magnetic data.
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Affiliation(s)
- Alexander N Selikhov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia.
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia
| | - Gautier Félix
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France.
| | - Dmitry M Lyubov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia.
- 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.
| | - Anton V Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia
| | - Saad Sene
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, France.
| | - Ilya V Taydakov
- P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Leninskiy Prospect 53, 119991, Moscow, Russia
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky Prospect, 47, 119991, Moscow, Russia
| | - Mikhail T Metlin
- P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Leninskiy Prospect 53, 119991, Moscow, Russia
| | - Andrey A Tyutyunov
- 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
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia.
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia
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3
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Armenis AS, Vipanchi V, Pantelis KN, Cunha-Silva L, Vignesh KR, Alexandropoulos DI, Stamatatos TC. Slow Magnetization Relaxation in a Family of Triangular {Co III 2 Ln III } Clusters: The Effect of Diamagnetic Co III Ions on the Ln III Magnetic Dynamics. Chemistry 2023; 29:e202302337. [PMID: 37638486 DOI: 10.1002/chem.202302337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/25/2023] [Accepted: 08/28/2023] [Indexed: 08/29/2023]
Abstract
The first use of the Schiff base chelate N-naphthalidene-o-aminophenol (naphH2 ) in Co/Ln chemistry has afforded a family of isostructural [CoIII 2 LnIII (OMe)2 (naph)2 (O2 CMe)3 (MeOH)2 ] (Ln=Tb, Dy and Er) complexes, revealing a rare {CoIII 2 Ln(μ3 -OMe)}8+ triangular core composed of two diamagnetic CoIII ions and a 4f-ion with slightly distorted square antiprismatic geometry. Alternating current (ac) magnetic susceptibility studies revealed that {Co2 Dy}, and its magnetic diluted analogue {Co2 Dy0.05 Y0.95 }, behave as mononuclear single-molecule magnets (SMMs) with similar energy barriers for the magnetization reversal, Ueff , of ~85-90 K. SMM properties were also detected for {Co2 Er}, with the compound exhibiting a Ueff of 18.7 K under an applied magnetic field of 800 Oe. To interpret the experimental magnetic results, ab initio CASSCF/RASSI-SO and DFT calculations were performed as a means of exploring the single-ion characteristics of LnIII ions and comprehend the role of the diamagnetic CoIII ions in the magnetization relaxation of the three heterometallic compounds.
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Affiliation(s)
| | - Vikram Vipanchi
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Sector-81, Knowledge city, S.A.S. Nagar, Mohali, 140306, Punjab, India
| | | | - Luís Cunha-Silva
- LAQV/REQUIMTE & Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007, Porto, Portugal
| | - Kuduva R Vignesh
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Sector-81, Knowledge city, S.A.S. Nagar, Mohali, 140306, Punjab, India
| | | | - Theocharis C Stamatatos
- Department of Chemistry, University of Patras, 265 04, Patras, Greece
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology - Hellas (FORTH/ICE - HT) Platani, P.O. Box 1414, 26504, Patras, Greece
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4
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Hiti EA, Kumar Mishra M, Smetana V, Mudring AV, Rogers RD. Isolation of Anhydrous Tetrabutylphosphonium Lanthanide Hexa- and Penta-Nitrates from Ionic Liquids. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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5
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Tan P, Yang Y, Lv W, Jing R, Cui H, Zheng SJ, Chen L, Yuan A, Chen XT, Zhao Y. A cyanometallate- and carbonate-bridged dysprosium chain complex with a pentadentate macrocyclic ligand: synthesis, structure, and magnetism. NEW J CHEM 2022. [DOI: 10.1039/d2nj00784c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A novel one-dimensional polymeric cyanometallate- and carbonate-bridged dysprosium(iii) chain with a pentadentate macrocyclic ligand exhibits field-induced multiple-relaxation processes.
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Affiliation(s)
- Pengfei Tan
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China
| | - Yimou Yang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China
| | - Wei Lv
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Rong Jing
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China
| | - Huihui Cui
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, P. R. China
| | - Shao-Jun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China
| | - Lei Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Aihua Yuan
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China
| | - Xue-Tai Chen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Yuyuan Zhao
- School of Medical Technology, Zhenjiang College, Zhenjiang 212003, P. R. China
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6
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Wang L, Yao X, Zou X, Li J, Sun W, Li G. Salen-type mononuclear dysprosium complex displays significant performance of single-molecule magnet. CrystEngComm 2022. [DOI: 10.1039/d1ce01684a] [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
Three salen-type mononuclear lanthanide complexes with general formula [Ln(5-NO2salcy)(NO3)(CH3OH)2] (Ln = Dy (1), Ho (2) and Er (3)) have been designed and synthesized by reactions of N,N'-bis(5-nitrosalicylaldehyde)ethane-1,2-cyclohexanediamine (5-NO2salcyH2) with various...
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7
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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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8
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Xiong X, Guan L, Wang Y, Liu C, Jin H, Chen Y, Wang X. Hydrothermal syntheses, crystal structures and properties of two H 2Tiron-bridged rare earth metal dinuclear complexes with 1,10-phenanthroline ligands. J COORD CHEM 2021. [DOI: 10.1080/00958972.2021.1894556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Xuejia Xiong
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
| | - Lei Guan
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
| | - Ying Wang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
| | - Chang Liu
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
| | - Hongzhe Jin
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
| | - Yaxu Chen
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
| | - Xin Wang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China
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9
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Liu J, Wang D, Xu X, Li H, Zhao J, Chen L. Multi-Nuclear Rare-Earth-Implanted Tartaric Acid-Functionalized Selenotungstates and Their Fluorescent and Magnetic Properties. Inorg Chem 2021; 60:2533-2541. [PMID: 33492931 DOI: 10.1021/acs.inorgchem.0c03443] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A family of multinuclear rare-earth (RE)-implanted H2tart2--functionalized selenotungstates (STs) [H2N(CH3)2]13H{[W2O5(OH)2(H2tart)2](H2tart){[W3O6RE2(H2O)6][SeW9O33]2}2}·31H2O [RE = Eu3+ (1), Tb3+ (2), Dy3+ (3), Ho3+ (4), Y3+ (5); H4tart = d-tartaric acid] have been afforded by a simple one-pot aqueous reaction and were structurally characterized. Intriguingly, their isomorphous organic-inorganic hybrid anion {[W2O5(OH)2(H2tart)2](H2tart){[W3O6RE2(H2O)6][SeW9O33]2}2}14- includes two sandwich-type {[W3O6[RE2(H2O)6][SeW9O33]2}4- dimeric units with a W-O-RE heterometal core, which are further joined by two H2tart2--decorated dinuclear tungsten-oxo {W2O5(OH)2(H2tart)2} clusters and a bridging H2tart2- ligand, contributing to a surprising Mobius band-like configuration. It is worth emphasizing that three H2tart2- ligands coordinate with tungsten centers rather than RE cations. For all we know, 1-5 delegate the infrequent RE-implanted STs functionalized by triplicate H2tart2- bridges. Furthermore, fluorescent performances of 1-4 as well as magnetic properties of 2-4 have been surveyed. The solid-state fluorescence emission spectra prove that each of them undoubtedly shows the characteristic emission peaks of RE cores, while alternating-current susceptibility measurements suggest field-induced single-molecule magnetic behavior in 3.
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Affiliation(s)
- Jinglin Liu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Dan Wang
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Xin Xu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Hailou Li
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Junwei Zhao
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
| | - Lijuan Chen
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
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10
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Zhang C, Cheng Z, Tan P, Lv W, Cui H, Chen L, Cai X, Zhao Y, Yuan A. Tuning the ligand field in seven-coordinate Dy( iii) complexes to perturb single-ion magnet behavior. NEW J CHEM 2021. [DOI: 10.1039/d1nj00734c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two mononuclear seven-coordinate Dy(iii) complexes with different strengths of ligand fields exhibit different slow magnetic relaxations.
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Affiliation(s)
- Chunyang Zhang
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Zhijie Cheng
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Pengfei Tan
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Wei Lv
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Huihui Cui
- School of Chemistry and Chemical Engineering
- Nantong University
- Nantong 226019
- P. R. China
| | - Lei Chen
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Xingwei Cai
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Yuyuan Zhao
- School of Medical Technology
- Zhenjiang College
- Zhenjiang 212003
- P. R. China
| | - Aihua Yuan
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
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11
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Zhang C, Liu M, Cai X, Chen L, Liu YZ, Cui H, Zhang SL, Yuan A. Observation of field-induced single-ion magnet behavior in an octahedral dysprosium complex with a strong ligand field. NEW J CHEM 2021. [DOI: 10.1039/d0nj05398h] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mononuclear six-coordinate DyIII complex exhibiting slow magnetic relaxation provides a rare case for octahedral lanthanide complexes with SMM behavior.
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Affiliation(s)
- Chunyang Zhang
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Mengyao Liu
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Xingwei Cai
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Lei Chen
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Yuan-Zhong Liu
- Suzhou Institute of Biomedical Engineering and Technology
- Chinese Academy of Sciences
- Suzhou 215163
- P. R. China
- Jinan Guoke Medical Technology Development Co., Ltd
| | - Huihui Cui
- School of Chemistry and Chemical Engineering
- Nantong University
- Jiangsu 226019
- P. R. China
| | - Shao-Liang Zhang
- Institution of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering, Liaocheng University
- Liaocheng 252059
- P. R. China
| | - Aihua Yuan
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
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12
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High-Coordinate Mononuclear Ln(III) Complexes: Synthetic Strategies and Magnetic Properties. MAGNETOCHEMISTRY 2020. [DOI: 10.3390/magnetochemistry7010001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Single-molecule magnets involving monometallic 4f complexes have been investigated extensively in last two decades to understand the factors that govern the slow magnetization relaxation behavior in these complexes and to establish a magneto-structural correlation. The prime goal in this direction is to suppress the temperature independent quantum tunneling of magnetization (QTM) effect via fine-tuning the coordination geometry/microenvironment. Among the various coordination geometries that have been pursued, complexes containing high coordination number around Ln(III) are sparse. Herein, we present a summary of the various synthetic strategies that were used for the assembly of 10- and 12-coordinated Ln(III) complexes. The magnetic properties of such complexes are also described.
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13
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Gil Y, Fuentealba P, Vega A, Spodine E, Aravena D. Control of magnetic anisotropy by macrocyclic ligand distortion in a family of Dy III and Er III single molecule magnets. Dalton Trans 2020; 49:17709-17718. [PMID: 33237049 DOI: 10.1039/d0dt03370g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A family of hexaazamacrocyclic lanthanide complexes, [Ln(Ln)(NCS)3] (LnIII = Dy, Er; n = 1-3) has been synthesized and characterized by single-crystal X-ray diffraction, magnetic measurements and ab initio calculations. Macrocyclic ligands (Ln) differ in the lateral spacers, which are aliphatic chains with two and three carbons (for Ln, n = 1 and 2, respectively), and an aromatic ring for Ln = 3. Modification of the macrocycle spacer tunes planarity and rigidity of the equatorial coordination for both oblate (Dy) and prolate (Er) lanthanide ions. Ac-susceptibility studies showed that four of the six complexes are field induced single molecule magnets (SMMs). Trends in magnetic relaxation properties are rationalized with the aid of ab initio multireference calculations, highlighting the combined influence of macrocycle planarity, lanthanide electronic density distribution and intermolecular interactions for the achievement of slow demagnetization.
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Affiliation(s)
- Yolimar Gil
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago, Chile.
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14
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Zhang SL, Li SS, Zeng SY, Shi Y, Wang DQ, Chen L. Slow magnetic relaxation in O–Se–O bridged manganese(iii) Schiff base complexes. NEW J CHEM 2020. [DOI: 10.1039/c9nj05837k] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Two new chain complexes consisting of a Mn(salen) building block bridged by O–Se–O units, [Mn2(salen)2(L)](ClO4) (1) and {[Mn(salen)]2(L)2}·Y (2) (salen = N,N′-bis(salicylidene)-ethylenediamine, L = 3,4,5-trifluorobenzeneseleninic acid, Y = salicylaldehyde) have been synthesized and characterized structurally and magnetically.
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Affiliation(s)
- Shao-Liang Zhang
- Institution of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- China
| | - Shan-Shan Li
- School of Environment and Planning
- Liaocheng University
- Liaocheng
- China
| | - Su-Yuan Zeng
- Institution of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- China
| | - Yang Shi
- Institution of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- China
| | - Da-Qi Wang
- Institution of Functional Organic Molecules and Materials
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- China
| | - Lei Chen
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- China
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15
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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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16
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Yi G, Cui H, Zhang C, Zhao W, Chen L, Zhang YQ, Chen XT, Song Y, Yuan A. A capped trigonal prismatic cobalt(ii) complex as a structural archetype for single-ion magnets. Dalton Trans 2020; 49:2063-2067. [DOI: 10.1039/c9dt04881b] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Mononuclear, seven-coordinate complex [CoII(BPA-TPA)](BF4)2 (BPA-TPA = pentapyidyldiamine) display field-induce slow magnetic relaxation, thereby presenting the first report of SIMs based on 3d metal ions with a capped trigonal prismatic geometry.
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Affiliation(s)
- Gangji Yi
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Huihui Cui
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Chunyang Zhang
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Wen Zhao
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Lei Chen
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Yi-Quan Zhang
- Jiangsu Key Lab for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- P. R. China
| | - Xue-Tai Chen
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - You Song
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Aihua Yuan
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
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17
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Yi G, Zhang C, Zhao W, Cui H, Chen L, Wang Z, Chen XT, Yuan A, Liu YZ, Ouyang ZW. Structure, magnetic anisotropy and relaxation behavior of seven-coordinate Co(ii) single-ion magnets perturbed by counter-anions. Dalton Trans 2020; 49:7620-7627. [DOI: 10.1039/d0dt01232g] [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
A series of mononuclear seven-coordinate complexes with the same coordination unit [Co(BPA-TPA)]2+ (BPA-TPA = pentapyidyldiamine) display the different slow magnetic relaxation processes perturbed by the variation of the counter anions.
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Affiliation(s)
- Gangji Yi
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Chunyang Zhang
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Wen Zhao
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Huihui Cui
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Lei Chen
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Zhenxing Wang
- Wuhan National High Magnetic Field Center& School of Physics
- Huazhong University of Science and Technology
- Wuhan 430074
- P. R. China
| | - Xue-Tai Chen
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Aihua Yuan
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Yuan-Zhong Liu
- Suzhou Institute of Biomedical Engineering and Technology
- Chinese Academy of Sciences
- Suzhou 215163
- P. R. China
- Jinan Guoke Medical Technology Development Co
| | - Zhong-Wen Ouyang
- Wuhan National High Magnetic Field Center& School of Physics
- Huazhong University of Science and Technology
- Wuhan 430074
- P. R. China
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18
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Cen P, Wang M, Ma X, Chen L, Zhang YQ, Li Y, Tian D, Liu X. Coordination microenvironment perturbed single-ion magnet behavior in a β-diketone Dy( iii) complex. CrystEngComm 2020. [DOI: 10.1039/d0ce00935k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Employing mixed β-diketonate and bpy ligands leads to a mononuclear Dy(iii) SIM, of which the magneto-structural correlation is elucidated by the magnetic and theoretical studies, as well as a comparative study of reported analogues.
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Affiliation(s)
- Peipei Cen
- College of Public Health and Management
- Ningxia Medical University
- Yinchuan 750021
- China
| | - Meilin Wang
- College of Public Health and Management
- Ningxia Medical University
- Yinchuan 750021
- China
| | - Xiufang Ma
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering
- National Demonstration Center for Experimental Chemistry Education
- College of Chemistry and Chemical Engineering
- Ningxia University
- Yinchuan 750021
| | - Lei Chen
- School of Material Science and Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- China
| | - Yonghong Li
- College of Public Health and Management
- Ningxia Medical University
- Yinchuan 750021
- China
| | - Danian Tian
- College of Public Health and Management
- Ningxia Medical University
- Yinchuan 750021
- China
| | - Xiangyu Liu
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering
- National Demonstration Center for Experimental Chemistry Education
- College of Chemistry and Chemical Engineering
- Ningxia University
- Yinchuan 750021
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19
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Magnetic Behavior of Luminescent Dinuclear Dysprosium and Terbium Complexes Derived from Phenoxyacetic Acid and 2,2’-Bipyridine. MAGNETOCHEMISTRY 2019. [DOI: 10.3390/magnetochemistry5040056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Two dinuclear lanthanide complexes [Dy2(L1)6(L2)2]·2EtOH (1) and [Tb2(L1)6(L2)2]·2EtOH (2) (HL1 = phenoxyacetic acid and L2 = 2,2’-bipyridine) were synthesized and the crystal structures were determined. In both complexes, the lanthanide centers are nine-coordinated and have a muffin geometry. Detailed magnetic study reveals the presence of field-induced single molecule magnet (SMM) behavior for complex 1, whereas complex 2 is non-SMM in nature. Further magnetic study with 1’, yttrium doped magnetically diluted sample of 1, disclosed the presence of Orbach and Raman relaxation processes with effective energy barrier, ∆E = 16.26 cm−1 and relaxation time, τo = 2.42 × 10−8 s. Luminescence spectra for complexes 1 and 2 in acetonitrile were studied which show characteristic emission peaks for DyIII and TbIII ions, respectively.
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20
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Petrosyants SP, Babeshkin KA, Gavrikov AV, Ilyukhin AB, Belova EV, Efimov NN. Towards comparative investigation of Er- and Yb-based SMMs: the effect of the coordination environment configuration on the magnetic relaxation in the series of heteroleptic thiocyanate complexes. Dalton Trans 2019; 48:12644-12655. [PMID: 31384881 DOI: 10.1039/c9dt02260k] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We prepared and studied two similar series of Er and Yb thiocyanates, involving [Ln(H2O)5(NCS)3]·H2O (1Er, 1Yb) as well as the molecular and ionic complexes with 2,2'-bipyridine (bpy) and 1,10-phenantroline (phen), [Ln(H2O)(bpy)2(NCS)3]·0.5(bpy)·H2O (2Er, 2Yb), [Ln(H2O)(phen)2(NCS)3]·phen·0.5H2O (3Er, 3Yb), [Hbpy][Ln(bpy)2(NCS)4]·H2O (4Er, 4Yb) and [Hphen][Ln(phen)2(NCS)4] (5Er, 5Yb). All the complexes were found to exhibit the properties of field-induced single-molecule magnets. For 1Yb, the effective value of the energy barrier for magnetization reversal, Δeff/kB, equals to 50 K, which is among the highest ones currently known for molecular SMMs based on Yb3+. The obtained data are discussed involving essential structural features of the complexes, namely the configuration of the Ln environment, i.e. its composition and geometry as well as mutual distribution of different donating centers. To the best of our knowledge, this work also involves experimental investigation of the largest and thus sufficiently representative series of similar mononuclear SMMs based on Er and Yb within one study.
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Affiliation(s)
- Svetlana P Petrosyants
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, 119991 Moscow, Russian Federation.
| | - Konstantin A Babeshkin
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, 119991 Moscow, Russian Federation.
| | - Andrey V Gavrikov
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, 119991 Moscow, Russian Federation.
| | - Andrey B Ilyukhin
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, 119991 Moscow, Russian Federation.
| | - Ekaterina V Belova
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, 119991 Moscow, Russian Federation. and Lomonosov Moscow State University, Department of Chemistry, GSP-1, Leninskie Gory 1/3, Moscow, 119991, Russian Federation
| | - Nikolay N Efimov
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, 119991 Moscow, Russian Federation.
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21
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Yao X, An G, Li Y, Yan P, Li W, Li G. Effect of nuclearity and symmetry on the single-molecule magnets behavior of seven-coordinated β-diketonate Dy(III) complexes. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.03.044] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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22
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Wu C, Li Q, Zhang X, Shi C, Li G, Wang M, Li K, Yuan A. Tuning the Photophysical and Excited State Properties of Phosphorescent Iridium(III) Complexes by Polycyclic Unit Substitution. ChemistryOpen 2019; 8:339-343. [PMID: 30976474 PMCID: PMC6437813 DOI: 10.1002/open.201900041] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 03/01/2019] [Indexed: 01/01/2023] Open
Abstract
Two novel N-embedded polycyclic units functionalized phosphorescent iridium(III) complexes (Ir-1 and Ir-2) with substituents in different positions have been prepared. Complex Ir-1 bearing the substituent at the 3-position shows a distinct blue shift single-peak emission (524 nm) with a higher luminescence efficiency (ΦPL=42 %) and shorter emission lifetime (τ=282 ns) by comparison with 4-position substitution based complex Ir-2 (ΦPL=23 %, τ=562 ns), which exhibits a dual-peak emission (564 nm and 602 nm), and phosphorescence color can be tuned from green to yellow. In addition, DFT calculations demonstrate that unusual ligand-to-metal charge transfer (3LMCT) excited state property can be found in Ir-2, which is in contrast to metal-to-ligand charge transfer (3MLCT) excited state character in Ir-1. This result can be attribute to strong electron-donating character and 4-position substitution effect of the unit.
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Affiliation(s)
- Cuicui Wu
- School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiang212003P. R. China., .
| | - Qiuxia Li
- School of Material Science and EngineeringJiangsu University of Science and TechnologyZhenjiang212003P. R. China.
| | - Xinghua Zhang
- School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiang212003P. R. China., .
| | - Chao Shi
- School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiang212003P. R. China., .
- School of Material Science and EngineeringJiangsu University of Science and TechnologyZhenjiang212003P. R. China.
| | - Gang Li
- School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiang212003P. R. China., .
| | - Mingjie Wang
- School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiang212003P. R. China., .
| | - Kang Li
- School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiang212003P. R. China., .
| | - Aihua Yuan
- School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiang212003P. R. China., .
- School of Material Science and EngineeringJiangsu University of Science and TechnologyZhenjiang212003P. R. China.
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23
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Yao X, Yan P, An G, Li Y, Li W, Li G. Local Geometry Symmetry and Electrostatic Distribution Dominated Eight‐Coordinate β‐Diketone Dy
III
SIMs. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xu Yao
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science Heilongjiang University No. 74, Xuefu Road 150080 Harbin Nangang District People's Republic of China
| | - Pengfei Yan
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science Heilongjiang University No. 74, Xuefu Road 150080 Harbin Nangang District People's Republic of China
| | - Guanghui An
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science Heilongjiang University No. 74, Xuefu Road 150080 Harbin Nangang District People's Republic of China
| | - Yuxin Li
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science Heilongjiang University No. 74, Xuefu Road 150080 Harbin Nangang District People's Republic of China
| | - Weizuo Li
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science Heilongjiang University No. 74, Xuefu Road 150080 Harbin Nangang District People's Republic of China
| | - Guangming Li
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science Heilongjiang University No. 74, Xuefu Road 150080 Harbin Nangang District People's Republic of China
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24
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Su QQ, Fan K, Jin XX, Huang XD, Cheng SC, Luo LJ, Li YJ, Xiang J, Ko CC, Zheng LM, Lau TC. Syntheses, crystal structures and magnetic properties of a series of luminescent lanthanide complexes containing neutral tetradentate phenanthroline-amide ligands. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00238c] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Six lanthanide compounds have been prepared from a neutral tetra-dentate ligand. Their luminescent and magnetic properties were investigated in detail.
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25
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Zhao W, Cui H, Chen XY, Yi G, Chen L, Yuan A, Luo CL. An eight-coordinate ytterbium complex with a hexagonal bipyramid geometry exhibiting field-induced single-ion magnet behaviour. Dalton Trans 2019; 48:5621-5626. [DOI: 10.1039/c9dt00663j] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
An eight-coordinate YbIII(NO3)3(tBu3PO)2 complex with ideal D3h symmetry represent the first report of YbIII-SIM based on a hexagonal bipyramidal geometry.
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Affiliation(s)
- Wen Zhao
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Huihui Cui
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Xiao-Yun Chen
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Gangji Yi
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Lei Chen
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Aihua Yuan
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Cheng-Lin Luo
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- P. R. China
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26
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Cañón-Mancisidor W, Zapata-Lizama M, Hermosilla-Ibáñez P, Cruz C, Venegas-Yazigi D, Mínguez Espallargas G. Hybrid organic–inorganic mononuclear lanthanoid single ion magnets. Chem Commun (Camb) 2019; 55:14992-14995. [DOI: 10.1039/c9cc07868a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The plasticity of the coordination chemistry of lanthanoid ions has allowed the design and synthesis for the first time of a family of mononuclear hybrid organic–inorganic lanthanoid complexes with slow relaxation of the magnetization.
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Affiliation(s)
- Walter Cañón-Mancisidor
- Universidad de Santiago de Chile
- Depto. de Química de los Materiales
- Santiago
- Chile
- Center for the Development of Nanoscience and Nanotechnology
| | - Matias Zapata-Lizama
- Universidad de Santiago de Chile
- Depto. de Química de los Materiales
- Santiago
- Chile
- Center for the Development of Nanoscience and Nanotechnology
| | - Patricio Hermosilla-Ibáñez
- Universidad de Santiago de Chile
- Depto. de Química de los Materiales
- Santiago
- Chile
- Center for the Development of Nanoscience and Nanotechnology
| | - Carlos Cruz
- Center for the Development of Nanoscience and Nanotechnology
- CEDENNA
- Chile
- Universidad Andres Bello
- Facultad de Ciencias Exactas
| | - Diego Venegas-Yazigi
- Universidad de Santiago de Chile
- Depto. de Química de los Materiales
- Santiago
- Chile
- Center for the Development of Nanoscience and Nanotechnology
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27
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Biswas S, Mandal L, Shen Y, Yamashita M. Exploration of SMM behavior of Ln2 complexes derived from thianaphthene-2-carboxylic acid. Dalton Trans 2019; 48:14096-14102. [DOI: 10.1039/c9dt01984g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Observations were made of field-induced SMM property of a dysprosium-based dinuclear complex derived from thianaphthene-2-carboxylic acid ligand.
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Affiliation(s)
- Soumava Biswas
- WPI Research Center
- Advanced Institute for Materials Research
- Tohoku University
- Sendai 980-8577
- Japan
| | - Leena Mandal
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Yongbing Shen
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Masahiro Yamashita
- WPI Research Center
- Advanced Institute for Materials Research
- Tohoku University
- Sendai 980-8577
- Japan
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28
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Chen L, Song J, Zhao W, Yi G, Zhou Z, Yuan A, Song Y, Wang Z, Ouyang ZW. A mononuclear five-coordinate Co(ii) single molecule magnet with a spin crossover between the S = 1/2 and 3/2 states. Dalton Trans 2018; 47:16596-16602. [PMID: 30417917 DOI: 10.1039/c8dt03783c] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although a great number of single-ion magnets (SIMs) and spin-crossover (SCO) compounds have been discovered, multifunctional materials with the combination of SCO and SIM properties are extremely scarce. Here magnetic studies have been carried out for a mononuclear, five-coordinate cobalt(ii) complex [Co(3,4-lut)4Br]Br (1) with square pyramidal geometry. Direct-current magnetic measurement confirms the spin transition between the S = 1/2 and 3/2 states in the range of 150-290 K with a small hysteresis loop. Frequency- and temperature-dependent alternating-current magnetic susceptibility reveals slow magnetization relaxation under an applied dc field of 3000 Oe. The work here presents the first instance of the five-coordinate mononuclear cobalt(ii)-based SIM exhibiting the thermally induced complete SCO.
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Affiliation(s)
- Lei Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China.
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29
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Krause J, Alexandropoulos DI, Carrella LM, Rentschler E, Stamatatos TC. Increasing the nuclearity and spin ground state in a new family of ferromagnetically-coupled {Ni 10} disk-like complexes bearing exclusively end-on bridging azido ligands. Chem Commun (Camb) 2018; 54:12499-12502. [PMID: 30345439 DOI: 10.1039/c8cc07722c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The synthesis of a new family of ferromagnetically-coupled {Ni10} clusters counterbalanced by various [Ln(NO3)5]2- ions is herein described. The resulting compounds are organic chelate-free and the metal ions are exclusively bridged by end-on azido ligands to stabilize a beautiful disk-like topology reminiscent of the structure of the brucite mineral.
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Affiliation(s)
- Jasmin Krause
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany.
| | - Dimitris I Alexandropoulos
- Department of Chemistry, 1812 Sir Isaac Brock Way, Brock University, L2S 3A1 St. Catharines, Ontario, Canada.
| | - Luca M Carrella
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany.
| | - Eva Rentschler
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany.
| | - Theocharis C Stamatatos
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany. and Department of Chemistry, 1812 Sir Isaac Brock Way, Brock University, L2S 3A1 St. Catharines, Ontario, Canada.
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30
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Aravena D. Ab Initio Prediction of Tunneling Relaxation Times and Effective Demagnetization Barriers in Kramers Lanthanide Single-Molecule Magnets. J Phys Chem Lett 2018; 9:5327-5333. [PMID: 30149712 DOI: 10.1021/acs.jpclett.8b02359] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Single-molecule magnets (SMMs) are promising candidates for molecule-based quantum information devices. Their main limitation is their cryogenic operative temperature. To achieve devices performing at higher temperatures, demagnetization mechanisms must be suppressed by chemical tuning. Electronic structure calculations can provide useful information to rationalize SMM behavior, but they do not provide a direct prediction for the key experimental parameters describing magnetic relaxation (i.e., tunneling relaxation time (τQT) and effective demagnetization barrier ( Ueff)). In this Letter, a first-principles model is proposed to predict τQT and Ueff for mononuclear, half-integer spin SMMs, allowing direct comparison with experiment. Model accuracy was assessed against experimental data for 18 mononuclear LnIII complexes (15 DyIII and 3 ErIII) and applied to 3 of the current best-performing SMMs, correctly predicting nontrivial relaxation pathways. The model shows that the combination of single-ion anisotropy and spin-spin dipolar coupling can account for the major part of tunneling demagnetization for the studied systems.
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Affiliation(s)
- Daniel Aravena
- Departamento de Química de los Materiales , Facultad de Química y Biología, Universidad de Santiago de Chile , Casilla 40, Correo 33 , Santiago , Chile
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31
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Zhou J, Song J, Yuan A, Wang Z, Chen L, Ouyang ZW. Slow magnetic relaxation in two octahedral cobalt(II) complexes with positive axial anisotropy. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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32
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Liu MJ, Yuan J, Tao J, Zhang YQ, Liu CM, Kou HZ. Rhodamine Salicylaldehyde Hydrazone Dy(III) Complexes: Fluorescence and Magnetism. Inorg Chem 2018; 57:4061-4069. [DOI: 10.1021/acs.inorgchem.8b00219] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mei-Jiao Liu
- Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Juan Yuan
- Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Jin Tao
- 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
| | - Cai-Ming Liu
- Beijing National Laboratory for Molecular Sciences, Center 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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33
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Yao X, Yan P, An G, Li Y, Li W, Li G. Investigation of magneto-structural correlation based on a series of seven-coordinated β-diketone Dy(iii) single-ion magnets with C2v and C3v local symmetry. Dalton Trans 2018; 47:3976-3984. [DOI: 10.1039/c7dt04764a] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Four field-induced single-ion magnets based on seven-coordinated Dy(iii) complexes have been prepared to explore the magnetism–structure relationship.
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Affiliation(s)
- Xu Yao
- Key Laboratory of Functional Inorganic Material Chemistry (MOE); School of Chemistry and Materials Science; Heilongjiang University
- Harbin
- People's Republic of China
| | - Pengfei Yan
- Key Laboratory of Functional Inorganic Material Chemistry (MOE); School of Chemistry and Materials Science; Heilongjiang University
- Harbin
- People's Republic of China
| | - Guanghui An
- Key Laboratory of Functional Inorganic Material Chemistry (MOE); School of Chemistry and Materials Science; Heilongjiang University
- Harbin
- People's Republic of China
| | - Yuxin Li
- Key Laboratory of Functional Inorganic Material Chemistry (MOE); School of Chemistry and Materials Science; Heilongjiang University
- Harbin
- People's Republic of China
| | - Weizuo Li
- Key Laboratory of Functional Inorganic Material Chemistry (MOE); School of Chemistry and Materials Science; Heilongjiang University
- Harbin
- People's Republic of China
| | - Guangming Li
- Key Laboratory of Functional Inorganic Material Chemistry (MOE); School of Chemistry and Materials Science; Heilongjiang University
- Harbin
- People's Republic of China
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34
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Chen L, Zhou J, Cui HH, Yuan AH, Wang Z, Zhang YQ, Ouyang ZW, Song Y. Slow magnetic relaxation influenced by change of symmetry from ideal Ci to D3d in cobalt(ii)-based single-ion magnets. Dalton Trans 2018; 47:2506-2510. [DOI: 10.1039/c7dt04651k] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two mononuclear complexes including the same cation [Co(imidazole)6]2+ and the different symmetries Ci and D3d showed discriminatively slow magnetic relaxation.
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Affiliation(s)
- Lei Chen
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Jianjun Zhou
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Hui-Hui Cui
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Ai-Hua Yuan
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Zhenxing Wang
- Wuhan National High Magnetic Field Center & School of Physics
- Huazhong University of Science and Technology
- Wuhan 430074
- 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
| | - Zhong-Wen Ouyang
- Wuhan National High Magnetic Field Center & School of Physics
- Huazhong University of Science and Technology
- Wuhan 430074
- P. R. China
| | - You Song
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
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