期刊
INORGANIC CHEMISTRY
卷 56, 期 1, 页码 147-155出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.6b01764
关键词
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资金
- JSPS Japan [23350067, 24655127]
- Grants-in-Aid for Scientific Research [24655127, 23350067] Funding Source: KAKEN
Two sets of isostructural Ln(III) mononuclear complexes, [Ln(NO3)(3)(18-crown-6)] (Ln = Ce (1), Pr (2), and Nd (3)) and [Ln(NO3)(3)(1,10-diaza-18-crown-6)] (Ln = Ce (4), Pr (5), and Nd (6)), were synthesized, and their slow magnetic relaxation behavior was investigated. Since Ln(III) ions are located in an axially stressed ligand field in both sets of complexes, they can exhibit single-molecule magnet (SMM) behavior owing to the oblate-type electronic distributions of the ground sublevels found in Ce(III), Pr(III), and Nd(III). Field-induced slow magnetic relaxation was observed for Ce(III) and Nd(III) complexes 1, 3, 4, and 6 under an applied bias dc field of 1000 Oe, whereas no slow relaxation was observed for Pr(III) complexes 2 and 5. The slow magnetic relaxation behavior of 1, 3, 4, and 6 was correlated with the even-numbered J(z) sublevels of Ce(III) and Nd(III) ions, known as the Kramers system.
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