Light Lanthanide Complexes with Crown Ether and Its Aza Derivative Which Show Slow Magnetic Relaxation Behaviors
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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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资源简介:
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.
创建时间:
2016-12-12



