| Numéro |
J. Phys. IV France
Volume 114, April 2004
|
|
|---|---|---|
| Page(s) | 533 - 535 | |
| DOI | https://doi.org/10.1051/jp4:2004114126 | |
J. Phys. IV France 114 (2004) 533
DOI: 10.1051/jp4:2004114126
Development of new magnetic organic conductors based on donor molecules with stable organic radical part
H.-J. Lee1, H.-B. Cui1, H. Fujiwara1, H. Kobayashi1, 1, E. Fujiwara2 and A. Kobayashi21 Institute for Molecular Science and CREST, JST, Myodaiji, Okazaki 444-8585, Japan
2 Research Centre for Spectrochemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
Abstract
A series of new magnetic organic conductors consisting of
donors with stable organic radical part and inorganic anions was
prepared. The air-stable TTP derivatives containing a PROXYL radical were
synthesized by phosphite-based cross-coupling reaction of 1,3-dithiol-2-one
derivatives and the thione containing a PROXYL radical. The ClO
4 and
FeCl
4 salts of TTP-PROXYL were electrochemically prepared. Besides the
2:1 salts with fairly high conductivity (D
2A; D=radical donor, A=
anion), there is a semiconducting 1:1 complex (TTP-PROXYL)FeCl
4
(
(RT) = 10
cm
-1,
Ea = 0.12 eV). The
temperature dependence of the susceptibilities suggests the coexistence of
n-radical spins (S=1/2) and Fe
3+ magnetic moments (S=5/2). The system
with non-magnetic ions, (TTP-PROXYL) GaCl
4 and (CpTTP-PROXYL)AsF
6
salts were also examined.
Key words. magnetic organic conductors, electrochemical method.
© EDP Sciences 2004