A slowly magnetic relaxing SmIII monomer with a D5h equatorial compressed ligand field

Yong-Ze Pan; Qiu-Yan Hua; Li-Shan Lin; Yi-Bo Qiu; Jun-Liang Liu; Ai-Ju Zhou; Wei-Quan Lin; Ji-Dong Leng

doi:10.1039/D0QI00326C

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A slowly magnetic relaxing Sm^III monomer with a D_5h equatorial compressed ligand field†

Yong-Ze Pan,^a Qiu-Yan Hua,^a Li-Shan Lin,^a Yi-Bo Qiu,^a Jun-Liang Liu,

^b Ai-Ju Zhou,^a Wei-Quan Lin

*^ac and Ji-Dong Leng

*^a

Author affiliations

* Corresponding authors

^a School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University No. 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, P. R. China
E-mail: jidong.leng@gzhu.edu.cn

^b Key Lab of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China

^c Analytical and Testing Center of Guangzhou University No. 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center, Guangzhou 510006, P. R. China

Abstract

By using a bi-dentate phosphine oxide ligand L (L = bis(diphenylphosphino)methane dioxide), two mono-nuclear lanthanide complexes [LnL₂(DMF)Cl₂]Cl (Ln = Sm, 1; Dy, 2) with a D_5h equatorial ligand field (LF) are obtained. Ab initio CASSCF calculations suggest that the equatorial LF promotes the magnetic anisotropy of the central Sm^III and impair that of Dy^III. Alternating current (ac) susceptibility measurements reveal that the samarium complex is the first Sm^III mono-nuclear complex with slow magnetic relaxation. The isostructural Dy^III compound, in contrast, relaxes much faster. Further magnetic property studies were then performed to probe the origin of magnetic anisotropy and magnetic relaxations.

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Article information

DOI: https://doi.org/10.1039/D0QI00326C
Article type: Research Article
Submitted: 16 Mar 2020
Accepted: 24 Apr 2020
First published: 27 Apr 2020

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Inorg. Chem. Front., 2020,7, 2335-2342

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A slowly magnetic relaxing Sm^III monomer with a D_5h equatorial compressed ligand field

Y. Pan, Q. Hua, L. Lin, Y. Qiu, J. Liu, A. Zhou, W. Lin and J. Leng, Inorg. Chem. Front., 2020, 7, 2335 DOI: 10.1039/D0QI00326C

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