Pure trinuclear 4f single-molecule magnets: synthesis, structures, magnetism and ab initio investigation |
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| Authors: | Guo Fu-Sheng Liu Jun-Liang Leng Ji-Dong Meng Zhao-Sha Lin Zhuo-Jia Tong Ming-Liang Gao Song Ungur Liviu Chibotaru Liviu F |
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| Affiliation: | Key Laboratory of Synthetic Bioinorganic Chemistry of Ministry of Education, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China. |
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| Abstract: | A family of linear Dy3 and Tb3 clusters have been facilely synthesized from the reactions of DyCl3, the polydentate 3‐methyloxysalicylaldoxime (MeOsaloxH2) ligand with auxiliary monoanionic ligands, such as trichloroacetate, NO3?, OH?, and Cl?. Complexes 1 – 5 contain a nearly linear Ln3 core, with similar Ln???Ln distances (3.6901(4)–3.7304(3) Å for the Dy3 species, and 3.7273(3)–3.7485(5) Å for the Tb3 species) and Ln???Ln???Ln angles of 157.036(8)–159.026(15)° for the Dy3 species and 157.156(8)–160.926(15)° for the Tb3 species. All three Ln centers are bridged by the two doubly‐deprotonated [MeOsalox]2? ligands and two of the four [MeOsaloxH]? ligands through the N,O‐η2‐oximato groups and the phenoxo oxygen atoms (Dy‐O‐Dy angles=102.28(16)–106.85(13)°; Tb‐O‐Tb angles=102.00(11)–106.62(11)°). The remaining two [MeOsaloxH]? ligands each chelate an outer LnIII center through their phenoxo oxygen and oxime nitrogen atoms. Magnetic studies reveal that both Dy3 and Tb3 clusters exhibit significant ferromagnetic interactions and that the Dy3 species behave as single‐molecule magnets, expanding upon the recent reports of the pure 4f type SMMs. |
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| Keywords: | ab initio investigation cluster compounds dysprosium magnetic properties single‐molecule magnets |
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