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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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Feng L, Yang Y, Wang YX, Zhao Y, Liu ZY, Cong J, Zhang YQ, Cheng P. Reversible single-crystal to single-crystal transformation between triangular single-molecule toroics. Dalton Trans 2023; 52:16596-16600. [PMID: 37955190 DOI: 10.1039/d3dt03191h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
We report a method for synthesizing single-molecule magnets through a single-crystal to single-crystal transformation. This process yields two single-molecule magnets with similar triangular Dy3 cores but distinct solvents and space groups achieved via solvent exchange. Magnetic properties reveal that both Dy3 molecules exhibit similar toroidal moments but manifest diverse multiple magnetization dynamic behaviors owing to the spin-lattice coupling influence from different solvent molecules.
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Affiliation(s)
- Lixi Feng
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry, Renewable Energy Conversion and Storage Center and Frontiers Science Center for New Organic Matter, and Haihe Laboratory of Sustainable Chemical transformations (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Yue Yang
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry, Renewable Energy Conversion and Storage Center and Frontiers Science Center for New Organic Matter, and Haihe Laboratory of Sustainable Chemical transformations (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Yu-Xia Wang
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry, Renewable Energy Conversion and Storage Center and Frontiers Science Center for New Organic Matter, and Haihe Laboratory of Sustainable Chemical transformations (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China.
- College of Chemistry, Tianjin Normal University, Tianjin, 300387, China
| | - Yizhen Zhao
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry, Renewable Energy Conversion and Storage Center and Frontiers Science Center for New Organic Matter, and Haihe Laboratory of Sustainable Chemical transformations (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Zhong-Yi Liu
- College of Chemistry, Tianjin Normal University, Tianjin, 300387, China
| | - Junzhuang Cong
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, 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
| | - Peng Cheng
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry, Renewable Energy Conversion and Storage Center and Frontiers Science Center for New Organic Matter, and Haihe Laboratory of Sustainable Chemical transformations (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China.
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Zou Q, Wang GL, Chen YQ, Huang XD, Wen GH, Qin MF, Bao SS, Zhang YQ, Zheng LM. X-Ray Triggered Coordination-Bond Breakage in Dysprosium-Organic Framework and its Impact on Magnetic Properties. Chemistry 2023; 29:e202203454. [PMID: 36445817 DOI: 10.1002/chem.202203454] [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: 11/07/2022] [Revised: 11/29/2022] [Accepted: 11/29/2022] [Indexed: 11/30/2022]
Abstract
Photosensitive lanthanide-based single-molecule magnets (Ln-SMM) are very attractive for their potential applications in information storage, switching, and sensors. However, the light-driven structural transformation in Ln-SMMs hardly changes the coordination number of the lanthanide ion. Herein, for the first time it is reported that X-ray (λ=0.71073 Å) irradiation can break the coordination bond of Dy-OH2 in the three-dimensional (3D) metal-organic framework Dy2 (amp2 H2 )3 (H2 O)6 ⋅ 4H2 O (MDAF-5), in which the {Dy2 (OPO)2 } dimers are cross-linked by dianthracene-phosphonate ligands. The structural transformation proceeds in a single-crystal-to-single-crystal (SC-SC) fashion, forming the new phase Dy2 (amp2 H2 )3 (H2 O)4 ⋅ 4H2 O (MDAF-5-X). The phase transition is accompanied by a significant change in magnetic properties due to the alteration in coordination geometry of the DyIII ion from a distorted pentagonal bipyramid in MDAF-5 to a distorted octahedron in MDAF-5-X.
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Affiliation(s)
- Qian Zou
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210023, P.R. China
| | - Guo-Lu Wang
- Jiangsu Key Laboratory for NSLSCS School of Physical Science and Technology, Nanjing Normal University, Nanjing, 210023, P.R. China
| | - Yi-Qing Chen
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210023, P.R. China
| | - Xin-Da Huang
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210023, P.R. China
| | - Ge Hua Wen
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210023, P.R. China
| | - Ming-Feng Qin
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210023, P.R. China
| | - Song-Song Bao
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210023, P.R. China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS School of Physical Science and Technology, Nanjing Normal University, Nanjing, 210023, P.R. China
| | - Li-Min Zheng
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210023, P.R. China
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Li HQ, Wang GL, Sun YC, Zhang YQ, Wang XY. Solvent Modification of the Structures and Magnetic Properties of a Series of Dysprosium(III) Single-Molecule Magnets. Inorg Chem 2022; 61:17537-17549. [DOI: 10.1021/acs.inorgchem.2c02513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hong-Qing Li
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Guo-Lu Wang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing210023, China
| | - Yu-Chen Sun
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing210023, China
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
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