Slow-Relaxation Behavior of a Mononuclear Co(II) Complex Featuring Long Axial Co-O Bond
Co(II) mononuclear complex with different coordination geometry would display various of field-induced single-ion magnet (SIM) behaviors. Here, we identify a field-induced single-ion magnet in a mononuclear complex Co(H<sub>2</sub>DPA)<sub>2</sub>·H<sub>2</sub>O (...
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MDPI AG
2022-02-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/4/707 |
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| author | Zhengyao Xia Yan Li Cheng Ji Yucheng Jiang Chunlan Ma Ju Gao Jinlei Zhang |
| author_facet | Zhengyao Xia Yan Li Cheng Ji Yucheng Jiang Chunlan Ma Ju Gao Jinlei Zhang |
| author_sort | Zhengyao Xia |
| collection | DOAJ |
| description | Co(II) mononuclear complex with different coordination geometry would display various of field-induced single-ion magnet (SIM) behaviors. Here, we identify a field-induced single-ion magnet in a mononuclear complex Co(H<sub>2</sub>DPA)<sub>2</sub>·H<sub>2</sub>O (H<sub>2</sub>DPA = 2,6-pyridine-dicarboxylic acid) by the hydrothermal method. The long axial Co-O coordination bond (Co1‧‧‧O3) can be formed by Co1 and O3. Therefore, Co(II) ion is six-coordinated in a distorted elongated octahedron. AC magnetization susceptibilities show that the effective energy barrier is up to 43.28 K. This is much larger than most mononuclear Co(II). The distorted elongated octahedron caused by the axial Co-O coordination bond is responsible for the high effective energy barrier. The distribution of electron density in Co1 and O3 atoms in the long axial bond would influence the magnetic relaxation process in turn. Our work deepens the relationship between the effective energy barrier and the weak change of ligand field by long axial bonds, which would facilitate constructing SIM with high energy temperature. |
| first_indexed | 2024-03-09T21:19:01Z |
| format | Article |
| id | doaj.art-8df86e608d1b4e318a5a40720a63c6b1 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T21:19:01Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-8df86e608d1b4e318a5a40720a63c6b12023-11-23T21:26:48ZengMDPI AGNanomaterials2079-49912022-02-0112470710.3390/nano12040707Slow-Relaxation Behavior of a Mononuclear Co(II) Complex Featuring Long Axial Co-O BondZhengyao Xia0Yan Li1Cheng Ji2Yucheng Jiang3Chunlan Ma4Ju Gao5Jinlei Zhang6Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou 215009, ChinaSchool of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, ChinaJiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou 215009, ChinaJiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou 215009, ChinaJiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou 215009, ChinaJiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou 215009, ChinaJiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou 215009, ChinaCo(II) mononuclear complex with different coordination geometry would display various of field-induced single-ion magnet (SIM) behaviors. Here, we identify a field-induced single-ion magnet in a mononuclear complex Co(H<sub>2</sub>DPA)<sub>2</sub>·H<sub>2</sub>O (H<sub>2</sub>DPA = 2,6-pyridine-dicarboxylic acid) by the hydrothermal method. The long axial Co-O coordination bond (Co1‧‧‧O3) can be formed by Co1 and O3. Therefore, Co(II) ion is six-coordinated in a distorted elongated octahedron. AC magnetization susceptibilities show that the effective energy barrier is up to 43.28 K. This is much larger than most mononuclear Co(II). The distorted elongated octahedron caused by the axial Co-O coordination bond is responsible for the high effective energy barrier. The distribution of electron density in Co1 and O3 atoms in the long axial bond would influence the magnetic relaxation process in turn. Our work deepens the relationship between the effective energy barrier and the weak change of ligand field by long axial bonds, which would facilitate constructing SIM with high energy temperature.https://www.mdpi.com/2079-4991/12/4/707single-ion magnethigh effective energy barrierlong axial bond |
| spellingShingle | Zhengyao Xia Yan Li Cheng Ji Yucheng Jiang Chunlan Ma Ju Gao Jinlei Zhang Slow-Relaxation Behavior of a Mononuclear Co(II) Complex Featuring Long Axial Co-O Bond Nanomaterials single-ion magnet high effective energy barrier long axial bond |
| title | Slow-Relaxation Behavior of a Mononuclear Co(II) Complex Featuring Long Axial Co-O Bond |
| title_full | Slow-Relaxation Behavior of a Mononuclear Co(II) Complex Featuring Long Axial Co-O Bond |
| title_fullStr | Slow-Relaxation Behavior of a Mononuclear Co(II) Complex Featuring Long Axial Co-O Bond |
| title_full_unstemmed | Slow-Relaxation Behavior of a Mononuclear Co(II) Complex Featuring Long Axial Co-O Bond |
| title_short | Slow-Relaxation Behavior of a Mononuclear Co(II) Complex Featuring Long Axial Co-O Bond |
| title_sort | slow relaxation behavior of a mononuclear co ii complex featuring long axial co o bond |
| topic | single-ion magnet high effective energy barrier long axial bond |
| url | https://www.mdpi.com/2079-4991/12/4/707 |
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