Design of high-spin organic molecules: toward magnetic parts in molecular electronics

다국어 초록 (Multilingual Abstract)

High-spin organic molecules are currently attracting great interest not only from the scientic viewpoint per se but also as thecandidate for magnetic parts in molecular electronics. In this context, we have prepared interesting molecules, spiro-fusedbis(diphenylamine)s, 10,100-spirobi[5,10-dihydrophenazasiline]s as the rst step to obtain the novel di(nitroxide radical)s. Thesebis(diphenylamine)s showed two reversible one-electron redox couples by cyclic voltammetry, indicating that the two diphenylaminemoieties are correlated each other through spiro-conjugation. Oxidation reaction of these amines resulted in mononitroxide species,the forbidden transitions in which were observed in the electron spin resonance spectra of its powder sample, showingSP 3=2. Thissuggests that there exists a sort of intermolecular magnetic interaction in the solid state of the mononitroxide species.. 2002 Elsevier Science B.V. All rights reserved.