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Approaches from High-Spin Organic Molecules to Organic Ferromagnets

Published online by Cambridge University Press:  25 February 2011

Takayuki Ishida ,
Katsuya Inoue ,
Noboru Koga ,
Nobuo Nakamura  and
Hiizu Iwamura
Takayuki Ishida
Affiliation:
Department of Chemistry, The University of Tokyo, 7–3–1 Hongo, Bunkyo-ku, Tokyo 113, Japan
Katsuya Inoue
Affiliation:
Department of Chemistry, The University of Tokyo, 7–3–1 Hongo, Bunkyo-ku, Tokyo 113, Japan
Noboru Koga
Affiliation:
Department of Chemistry, The University of Tokyo, 7–3–1 Hongo, Bunkyo-ku, Tokyo 113, Japan
Nobuo Nakamura
Affiliation:
Department of Chemistry, The University of Tokyo, 7–3–1 Hongo, Bunkyo-ku, Tokyo 113, Japan
Hiizu Iwamura
Affiliation:
Department of Chemistry, The University of Tokyo, 7–3–1 Hongo, Bunkyo-ku, Tokyo 113, Japan
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Abstract

Pseudo-two dimensional branched polycarbenes 1, 3, 5-[H(m-C6H4C:)n/3]3C6H3 (2)(n = 6, 9) were prepared. The measurement of their magnetization on a Faraday balance equipped with a light guide has revealed that 2(n = 6) has a tridecet ground state (S = 6.0). The m-phenylene skeleton as a dependable ferromagnetic coupling unit has also been applied with success to the synthesis of persistent systems, i.e., 5, by replacing each carbene center in linear polycarbenes 1 with a nitroxide. A necessary degree of steric protection of the radical centers was disclosed. Extension to real polymers 4 gave an only partly successful result.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 247: Symposium N – Electrical, Optical, and Magnetic Properties of Organic Solid State Materials , 1992 , 407
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

1. Iwamura, H.. Pure Appl. Chem., 58, 187 (1986);Google Scholar
Iwamura, H.. Pure Appl. Chem., 59, 1595 (1987): J. Phys. 49, C8–813 (1988); Adv. Phys. Org. Chem. 26, 179 (1990).Google Scholar
2. Mataga, N., Theor. Chlm. Acta, 10, 372 (1968);Google Scholar
Itoh, K., Bussel (In Japanese), 12, 635 (1971).Google Scholar
3. Tekl, Y., Takul, T., Itoh, K., Iwamura, H., and Kobayashl, K., J. Am. Chem. Soc. 105, 3722 (1983);Google Scholar
Sugawara, T., Bandow, S., Klmura, K., Iwamura, H., and Itoh, K., J. Am. Chem. Soc., 106, 6449 (1984);Google Scholar
Sugawara, T., Bandow, S., Kimura, K., Iwamura, H., and Itoh, K., J. Am. Chem. Soc., 108, 368 (1986);Google Scholar
Teki, Y., Takui, T., Itoh, K., Iwamura, H., and Kobayashi, K., J. Am. Chem. Soc., 108, 2147 (1986);Google Scholar
Fujita, I., Teki, Y., Takui, T., Kinoshita, Y., Itoh, K., Miko, F., Sawaki, Y., Izuoka, A., Sugawara, T., and Iwamura, H., J. Am. Chem. Soc., 113, 4074 (1990).Google Scholar
4. Izuoka, A., Murata, S., Sugawara, T., and Iwamrua, H., J. Am. Chem. Soc. 107, 1786 (1985);Google Scholar
Sugawara, T., Murata, S., Kimura, K., Iwamura, H., Sugawara, Y., and Iwasaki, H., J. Am. Chem. Soc., 107, 5293 (1985);Google Scholar
Izuoka, A., Murata, S., Sugawara, T., and Iwamura, H., J. Am. Chem. Soc., 109, 2631 (1987).Google Scholar
5. A similar branched-chain polyradical having a triarylmethyl as a spin carrier has been reported: Rajca, A., J. Am. Chem. Soc. 112, 5890 (1990).Google Scholar
6. Fujioka, T., M.S. thesis. Nagoya University, 1985.Google Scholar
7. Balasubramanian, K., Selvaraj, S., and Venkatararaani, P. S., Synthesis, 29 (1980).Google Scholar
8. Nakamura, N., Inoue, K., and Iwamura, H., presented at the 62nd Fall Meeting of the Chemical Society of Japan, Sapporo, september 1991 (unpublished).Google Scholar
9. Nath, K., Taylor, P. L., Mol. Cryst. Liq. Cryst. 205, 87 (1991).Google Scholar
10. Ishida, K. and Iwamura, H., J. Am. Chem. Soc, 113, 4238 (1991).Google Scholar
11. Tyutyulkov, N. and Karabunarllev, S., Intern. J. Quantum Chem. 29, 1325 (1986).Google Scholar
12. Wasserman, E., Murray, R. W., Yager, W. A., Trozzolo, A. M., and Smolinsky, G., J. Am. Chem. Soc., 89, 5076 (1967).Google Scholar
13. Tukada, H., Mutai, K., and Iwamura, H., J. Chem. Soc. Chem. Commun., 1159 (1987).Google Scholar
14. Jotham, R. W., Kettle, S. F., and Marks, J. A., J. Chem. Soc, Faraday Trans. 2, 125 (1976).Google Scholar
15. Ovchinnikov, A. A., Theor. Chem. Acta 47, 297 (1978).Google Scholar
16. Aurlch, H. G., Deuschle, E., and Lotz, I., J. Chem. Res., Synop. 248 (1977).Google Scholar
17. Tyutyulkov, N. N., Ivanov, C. I., Schopov, I., Polansky, O. E., and Olbrich, G., Int. J. Quantum Chem., 34. 361 (1988).Google Scholar