4.7 Article

Biradical chelating host 2,2 '-bipyridine-6,6 '-diyl bis(tert-butyl nitroxide) showing tunable exchange magnetic coupling

Journal

INORGANIC CHEMISTRY COMMUNICATIONS
Volume 14, Issue 1, Pages 194-196

Publisher

ELSEVIER
DOI: 10.1016/j.inoche.2010.10.020

Keywords

Supramolecular chemistry; Magnetic property; Organic free radical; Lanthanum; Bipyridine

Funding

  1. MEXT, Japan [21110513, 22350059]
  2. Grants-in-Aid for Scientific Research [22350059] Funding Source: KAKEN

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The title compound was proposed as a paramagnetic host, and its chelation ability was confirmed by inclusion of a size-matching lanthanum(III) ion. The anti-configuration of the free ligand was changed to the syn configuration in the complex. The antiferromagnetic coupling was enhanced after complexation. In addition to the change of the intramolecular magnetic coupling, a superexchange mechanism is also assumed across the nitroxide-lanthanum(III)-nitroxide structure. (C) 2010 Elsevier B.V. All rights reserved.

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