Magneto-Chiral Dichroism in a One-Dimensional Assembly of Helical Dysprosium(III) Single-Molecule Magnets
Here we report magneto-chiral dichroism (MChD) detected through visible and near-infrared light absorption of a chiral dysprosium(III) coordination polymer. The two enantiomers of [DyIII(H6(py)2)(hfac)3] n [H6(py)2 = 2,15-bis(4-pyridyl)ethynylcarbo[6]helicene; hfac– = 1,1,1,5,5,5-hexafluoroac...
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| Veröffentlicht in: | Inorganic chemistry 2023-10, Vol.62 (43), p.17583-17587 |
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| creator | Raju, Maria Sara Dhbaibi, Kais Grasser, Maxime Dorcet, Vincent Breslavetz, Ivan Paillot, Kévin Vanthuyne, Nicolas Cador, Olivier Rikken, Geert L. J. A. Le Guennic, Boris Crassous, Jeanne Pointillart, Fabrice Train, Cyrille Atzori, Matteo |
| description | Here we report magneto-chiral dichroism (MChD) detected through visible and near-infrared light absorption of a chiral dysprosium(III) coordination polymer. The two enantiomers of [DyIII(H6(py)2)(hfac)3] n [H6(py)2 = 2,15-bis(4-pyridyl)ethynylcarbo[6]helicene; hfac– = 1,1,1,5,5,5-hexafluoroacetylacetonate], where the chirality is provided by a functionalized helicene ligand, were structurally, spectroscopically, and magnetically investigated. Magnetic measurements reveal a slow relaxation of the magnetization, with differences between enantiopure and racemic systems rationalized on the basis of theoretical calculations. When the enantiopure complexes are irradiated with unpolarized light in a magnetic field, they exhibit multiple MChD signals associated with the f–f electronic transitions of DyIII, thus providing the coexistence of MChD-active absorptions and single-molecule-magnet (SMM) behavior. These findings clearly show the potential that rationally designed chiral SMMs have in enabling the optical readout of magnetic memory through MChD. |
| doi_str_mv | 10.1021/acs.inorgchem.3c03204 |
| format | Article |
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J. A. ; Le Guennic, Boris ; Crassous, Jeanne ; Pointillart, Fabrice ; Train, Cyrille ; Atzori, Matteo</creator><creatorcontrib>Raju, Maria Sara ; Dhbaibi, Kais ; Grasser, Maxime ; Dorcet, Vincent ; Breslavetz, Ivan ; Paillot, Kévin ; Vanthuyne, Nicolas ; Cador, Olivier ; Rikken, Geert L. J. A. ; Le Guennic, Boris ; Crassous, Jeanne ; Pointillart, Fabrice ; Train, Cyrille ; Atzori, Matteo</creatorcontrib><description>Here we report magneto-chiral dichroism (MChD) detected through visible and near-infrared light absorption of a chiral dysprosium(III) coordination polymer. The two enantiomers of [DyIII(H6(py)2)(hfac)3] n [H6(py)2 = 2,15-bis(4-pyridyl)ethynylcarbo[6]helicene; hfac– = 1,1,1,5,5,5-hexafluoroacetylacetonate], where the chirality is provided by a functionalized helicene ligand, were structurally, spectroscopically, and magnetically investigated. Magnetic measurements reveal a slow relaxation of the magnetization, with differences between enantiopure and racemic systems rationalized on the basis of theoretical calculations. When the enantiopure complexes are irradiated with unpolarized light in a magnetic field, they exhibit multiple MChD signals associated with the f–f electronic transitions of DyIII, thus providing the coexistence of MChD-active absorptions and single-molecule-magnet (SMM) behavior. 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A.</au><au>Le Guennic, Boris</au><au>Crassous, Jeanne</au><au>Pointillart, Fabrice</au><au>Train, Cyrille</au><au>Atzori, Matteo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Magneto-Chiral Dichroism in a One-Dimensional Assembly of Helical Dysprosium(III) Single-Molecule Magnets</atitle><jtitle>Inorganic chemistry</jtitle><addtitle>Inorg. Chem</addtitle><date>2023-10-30</date><risdate>2023</risdate><volume>62</volume><issue>43</issue><spage>17583</spage><epage>17587</epage><pages>17583-17587</pages><issn>0020-1669</issn><eissn>1520-510X</eissn><abstract>Here we report magneto-chiral dichroism (MChD) detected through visible and near-infrared light absorption of a chiral dysprosium(III) coordination polymer. The two enantiomers of [DyIII(H6(py)2)(hfac)3] n [H6(py)2 = 2,15-bis(4-pyridyl)ethynylcarbo[6]helicene; hfac– = 1,1,1,5,5,5-hexafluoroacetylacetonate], where the chirality is provided by a functionalized helicene ligand, were structurally, spectroscopically, and magnetically investigated. Magnetic measurements reveal a slow relaxation of the magnetization, with differences between enantiopure and racemic systems rationalized on the basis of theoretical calculations. When the enantiopure complexes are irradiated with unpolarized light in a magnetic field, they exhibit multiple MChD signals associated with the f–f electronic transitions of DyIII, thus providing the coexistence of MChD-active absorptions and single-molecule-magnet (SMM) behavior. 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| title | Magneto-Chiral Dichroism in a One-Dimensional Assembly of Helical Dysprosium(III) Single-Molecule Magnets |
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