Journal
POLYHEDRON
Volume 66, Issue -, Pages 183-187Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2013.04.004
Keywords
Single-molecule magnet; Lanthanide; Lanthanoid; Rare earth metal; Exchange interaction
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Funding
- KAKENHI [JSPS/22350059, MEXT/23110711]
- Inter-University Cooperative Research Program of the Institute for Materials Research, Tohoku University
- Grants-in-Aid for Scientific Research [24108704, 22350059] Funding Source: KAKEN
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Antiferro- and ferromagnetic couplings were observed in [Gd(hfac)(3)(2pyNO)(H2O)] and [Gd(hfac)(3)(-HNN)(2)], respectively, where 2pyNO stands for tert-butyl 2-pyridyl nitroxide and HNN for 4,4,5,5-tetramethylimidazolin-1-oxyl 3-oxide. The magnitude of the former is the largest in Gd-nitroxide complexes (2J/k(B) = -13.8(3) K). An empirical relation between the exchange coupling and torsion angle Gd-O-N-C is drawn, where large torsion (>36 degrees) favors ferromagnetic coupling. (C) 2013 Elsevier Ltd. All rights reserved.
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