Several Kinds of Aminoxyl Radicals and Their Metal Ion Complexes

Molecular Crystals and Liquid Crystals 103, 2325 1999

Tadashi Sugano^a, Stephen Blundell^b, Francis L. Pratt^b, Thomas Jestädt^b, Brendon W. Lovett^b, William Hayes^b, and Peter Day^c

Affiliations
^aDepartment of Chemistry, Meiji Gakuin University, Kamikurata, Totsukaku, Yokohama 244, Japan
^bDepartment of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, UK
^cRoyal Institution of Great Britain, 21 Albemarle Street, London W1X 4BS, UK

Abstract

Recent results of magnetization, magnetic susceptibility and muon spin rotation/relaxation (mSR) measurements of some organic neutral radicals based on aminoxyl and their anion radical complexes with alkali and transition metal cations are reported. Ferromagnetic intermolecular interactions, coexistent with antiferromagnetic ones, in several caboxyaryl nitronyl nitroxide radicals are affected by inserting alkali metal ions, while the incorporations of transtion metal ions result in a complex behavior, suggesting in part ferromagnetic interactions. The temperature dependence of the spontaneous magnetization of TANOL suberate in the ordered state, obtained through the results of mSR measurements, is characteristic of a two-dimensional magnetic lattice, consistent with that of the magnetic susceptibility above the ordering temperature.

Keywords

molecular magnetism
aminoxyl radicals
ion radical complexes

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