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Magnetic Properties of Microcrystalline Poly(Phenyl- Diacetylenes) Carrying Radical or Carbene Centers on the Side Chains

Published online by Cambridge University Press:  25 February 2011

Noboru Koga ,
Katsuya Inoue ,
Noriko Sasagawa  and
Hiizu Iwamura
Noboru Koga
Affiliation:
The University of Tokyo, 7–3–1 Hongo, Bunkyo-ku, Tokyo 113, Japan
Katsuya Inoue
Affiliation:
The University of Tokyo, 7–3–1 Hongo, Bunkyo-ku, Tokyo 113, Japan
Noriko Sasagawa
Affiliation:
The University of Tokyo, 7–3–1 Hongo, Bunkyo-ku, Tokyo 113, Japan
Hiizu Iwamura
Affiliation:
The University of Tokyo, 7–3–1 Hongo, Bunkyo-ku, Tokyo 113, Japan
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Abstract

1-Phenyl-l,3-butadiyne derivatives (3 and 4) carrying stable t-butylnitroxide and diazomethyl groups, respectively, have been prepared. Mixed crystals of 3 and the corresponding hydroxylamine 2 (x003c:1:1) polymerized in the solid state at 100°C to give black-violet microcrystals with a metallic luster. A microcrystalline sample of 4 underwent spontaneous polymerization at room temperature when crystallized to give an insoluble polymer which was then photolyzed at cryogenic temperature to generate triplet carbene centers attached to the phenyl rings of the poly(phenyldiacetylene). Some of these microcrystalline polymeric samples were responsive to a magnet at room temperature. Magnetic susceptibility measurements on the two samples revealed only weakly coupled independent spins Hydrogen bonding between the polydiacetylene chains as estimated by X-ray crystal structure of 2 is expected to be effective for increasing the dimension of the spin alignment.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 173: Symposium Q – Advanced Organic Solid State Materials , 1989 , 39
Copyright
Copyright © Materials Research Society 1990

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References

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