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Pure Appl. Chem., 2010, Vol. 82, No. 4, pp. 979-989

Published online 2010-03-17

Macrocyclic oligoarylamine-based spin system

Akihiro Ito and Kazuyoshi Tanaka*

Department of Molecular Engineering, Kyoto University, Nishikyo-ku, Kyoto 615‑8510, Japan

Abstract: Alternating meta- and para-phenylene-linked oligoarylamines are considered as promising molecular parts for the molecule-based electronics and/or spintronics due to their intriguing electronic and magnetic properties. From the magnetic viewpoint, a -meta-phenylene linker plays a crucial role in ensuring the effective ferromagnetic interaction, while para-phenylene linker plays an important part in stabilizing the spin-containing aminium radical cations. Of the metapara and all-meta oligoarylamines prepared so far, the macrocyclic oligoarylamines are structurally defined, and therefore we can employ them as the component pieces to prepare the two- or three-dimensionally structured oligoarylamines. The spin electronic properties of polycationic species generated from two kinds of macrocyclic oligoarylamines, which will be able to be extended into the 2D multi-spin molecular systems, are described on the basis of the pulsed electron spin resonance (ESR) measurements.