Synthesis, Structure, and Magnetic Properties of Rare-Earth Bis(diazabutadiene) Diradical Complexes
| Autor: | Yin-Shan Meng, Haihan Yan, Wen-Xiong Zhang, Botao Wu, Zhenfeng Xi |
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| Rok vydání: | 2021 |
| Předmět: |
010405 organic chemistry
Diradical Chemistry Radical Rare earth 010402 general chemistry 01 natural sciences Antiferromagnetic coupling 0104 chemical sciences Inorganic Chemistry Metal Crystallography Effective energy visual_art visual_art.visual_art_medium Density functional theory Physical and Theoretical Chemistry |
| Zdroj: | Inorganic Chemistry. 60:1315-1319 |
| ISSN: | 1520-510X 0020-1669 |
| DOI: | 10.1021/acs.inorgchem.0c03534 |
| Popis: | New kinds of diradical rare-earth metal complexes supported by diazabutadiene (DAD) ligands, [(DAD)2LnN(TMS)2] (1; Ln = Dy, Lu; TMS = SiMe3), were synthesized and studied. They showed a new [radical-Ln-radical] alignment with distorted square-pyramidal geometry. Structural and density functional theory analysis illustrated the radical anionic nature of the ligands. Magnetic studies revealed antiferromagnetic coupling of the two radicals in 1-Lu. 1-Dy showed typical single-molecule-magnet (SMM) behavior with an effective energy barrier of 231 K, which is much higher than those of similar radical-containing SMMs. Magnetostructural analysis suggests that the anionic [N(TMS)2]- group plays a vital role in the SMM property. This study provides a new platform for further improving the performance of radical-Ln SMMs. |
| Databáze: | OpenAIRE |
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