Chiral Dy(III) Fluorescent Single-Molecule Magnet Based on an Achiral Flexible Ligand
A novel multi-channel barcode module was developed by using chiral co-crystals which contain field-induced SMM behavior and different emission bands. The chiral co-crystals [Zn(H<sub>2</sub>L)Dy(DBM)<sub>2</sub>]<sub>4</sub>(ClO<sub>4</sub>)<sub>...
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MDPI AG
2022-11-01
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| Series: | Magnetochemistry |
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| Online Access: | https://www.mdpi.com/2312-7481/8/12/166 |
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| author | Min Zeng Lin Miao Xue-Ru Wu Cai-Ming Liu Hui-Zhong Kou |
| author_facet | Min Zeng Lin Miao Xue-Ru Wu Cai-Ming Liu Hui-Zhong Kou |
| author_sort | Min Zeng |
| collection | DOAJ |
| description | A novel multi-channel barcode module was developed by using chiral co-crystals which contain field-induced SMM behavior and different emission bands. The chiral co-crystals [Zn(H<sub>2</sub>L)Dy(DBM)<sub>2</sub>]<sub>4</sub>(ClO<sub>4</sub>)<sub>4</sub>⋅9CH<sub>3</sub>OH⋅H<sub>2</sub>O (<b>1a</b>) and [Zn(H<sub>2</sub>L)Dy(DBM)<sub>2</sub>]<sub>4</sub>(ClO<sub>4</sub>)<sub>4</sub>⋅8CH<sub>3</sub>OH⋅0.5H<sub>2</sub>O (<b>1b</b>) (H<sub>4</sub>L = 2,2′-[1,2-ethanediylbis[(hydroxyethylimino)methylene]]bis[6-methoxy-4-methyl-phenol], HDBM = dibenzoylmethane) were obtained through one-pot reaction of Zn<sup>II</sup> and Dy<sup>III</sup> with the achiral ligands H<sub>4</sub>L and HDBM. X-ray single crystal diffraction and CD spectroscopy confirmed that they are enantiomers crystallized in <i>P</i>4<sub>3</sub> (<b>1a</b>) and <i>P</i>4<sub>1</sub> (<b>1b</b>), both consisting of two ∆-[Zn(H<sub>2</sub>L)Dy(DBM)<sub>2</sub>]<sup>+</sup> cations, two Λ-[Zn(H<sub>2</sub>L)Dy(DBM)<sub>2</sub>]<sup>+</sup> cations and four (ClO<sub>4</sub>)<sup>−</sup> anions. The presence of Dy<sup>III</sup> ions endow them with the property of field-induced slow magnetic relaxation. The relatively low energy barrier of 35.0(9) K for complex <b>1</b> may be due to the poor axiality of the ligand field caused by the long Dy-O<sub>phenoxy</sub> bond lengths and the small O<sub>phenoxy</sub>-Dy-O<sub>phenoxy</sub> bond angles. Moreover, when the organic ligands H<sub>4</sub>L (λ<sub>ex</sub> = 350 nm) and Dy<sup>III</sup> (λ<sub>ex</sub> = 420 nm) are excited, different emission spectra are observed. |
| first_indexed | 2024-03-09T16:10:07Z |
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| id | doaj.art-827544f74b9044d2a7164851f44c3df3 |
| institution | Directory Open Access Journal |
| issn | 2312-7481 |
| language | English |
| last_indexed | 2024-03-09T16:10:07Z |
| publishDate | 2022-11-01 |
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| spelling | doaj.art-827544f74b9044d2a7164851f44c3df32023-11-24T16:18:24ZengMDPI AGMagnetochemistry2312-74812022-11-0181216610.3390/magnetochemistry8120166Chiral Dy(III) Fluorescent Single-Molecule Magnet Based on an Achiral Flexible LigandMin Zeng0Lin Miao1Xue-Ru Wu2Cai-Ming Liu3Hui-Zhong Kou4Department of Chemistry, Tsinghua University, Beijing 100084, ChinaDepartment of Chemistry, Tsinghua University, Beijing 100084, ChinaDepartment of Chemistry, Tsinghua University, Beijing 100084, ChinaBeijing National Laboratory for Molecular Sciences, Centre for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, ChinaDepartment of Chemistry, Tsinghua University, Beijing 100084, ChinaA novel multi-channel barcode module was developed by using chiral co-crystals which contain field-induced SMM behavior and different emission bands. The chiral co-crystals [Zn(H<sub>2</sub>L)Dy(DBM)<sub>2</sub>]<sub>4</sub>(ClO<sub>4</sub>)<sub>4</sub>⋅9CH<sub>3</sub>OH⋅H<sub>2</sub>O (<b>1a</b>) and [Zn(H<sub>2</sub>L)Dy(DBM)<sub>2</sub>]<sub>4</sub>(ClO<sub>4</sub>)<sub>4</sub>⋅8CH<sub>3</sub>OH⋅0.5H<sub>2</sub>O (<b>1b</b>) (H<sub>4</sub>L = 2,2′-[1,2-ethanediylbis[(hydroxyethylimino)methylene]]bis[6-methoxy-4-methyl-phenol], HDBM = dibenzoylmethane) were obtained through one-pot reaction of Zn<sup>II</sup> and Dy<sup>III</sup> with the achiral ligands H<sub>4</sub>L and HDBM. X-ray single crystal diffraction and CD spectroscopy confirmed that they are enantiomers crystallized in <i>P</i>4<sub>3</sub> (<b>1a</b>) and <i>P</i>4<sub>1</sub> (<b>1b</b>), both consisting of two ∆-[Zn(H<sub>2</sub>L)Dy(DBM)<sub>2</sub>]<sup>+</sup> cations, two Λ-[Zn(H<sub>2</sub>L)Dy(DBM)<sub>2</sub>]<sup>+</sup> cations and four (ClO<sub>4</sub>)<sup>−</sup> anions. The presence of Dy<sup>III</sup> ions endow them with the property of field-induced slow magnetic relaxation. The relatively low energy barrier of 35.0(9) K for complex <b>1</b> may be due to the poor axiality of the ligand field caused by the long Dy-O<sub>phenoxy</sub> bond lengths and the small O<sub>phenoxy</sub>-Dy-O<sub>phenoxy</sub> bond angles. Moreover, when the organic ligands H<sub>4</sub>L (λ<sub>ex</sub> = 350 nm) and Dy<sup>III</sup> (λ<sub>ex</sub> = 420 nm) are excited, different emission spectra are observed.https://www.mdpi.com/2312-7481/8/12/166flexible ligandchiral co-crystalsingle-molecule magnetfluorescencedysprosium |
| spellingShingle | Min Zeng Lin Miao Xue-Ru Wu Cai-Ming Liu Hui-Zhong Kou Chiral Dy(III) Fluorescent Single-Molecule Magnet Based on an Achiral Flexible Ligand Magnetochemistry flexible ligand chiral co-crystal single-molecule magnet fluorescence dysprosium |
| title | Chiral Dy(III) Fluorescent Single-Molecule Magnet Based on an Achiral Flexible Ligand |
| title_full | Chiral Dy(III) Fluorescent Single-Molecule Magnet Based on an Achiral Flexible Ligand |
| title_fullStr | Chiral Dy(III) Fluorescent Single-Molecule Magnet Based on an Achiral Flexible Ligand |
| title_full_unstemmed | Chiral Dy(III) Fluorescent Single-Molecule Magnet Based on an Achiral Flexible Ligand |
| title_short | Chiral Dy(III) Fluorescent Single-Molecule Magnet Based on an Achiral Flexible Ligand |
| title_sort | chiral dy iii fluorescent single molecule magnet based on an achiral flexible ligand |
| topic | flexible ligand chiral co-crystal single-molecule magnet fluorescence dysprosium |
| url | https://www.mdpi.com/2312-7481/8/12/166 |
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