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Light Lanthanide Complexes with Crown Ether and Its Aza Derivative Which Show Slow Magnetic Relaxation Behaviors

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NIAID Data Ecosystem2026-03-09 收录
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https://figshare.com/articles/dataset/Light_Lanthanide_Complexes_with_Crown_Ether_and_Its_Aza_Derivative_Which_Show_Slow_Magnetic_Relaxation_Behaviors/4309274
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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 Jz sublevels of Ce­(III) and Nd­(III) ions, known as the Kramers system.
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2016-12-12
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