High spin chemistry underlying organic molecular magnetism : Topological symmetry rule as the first principle of spin alignment in organic open-shell systems of π-conjugation and their ions
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概要
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This review paper deals with an overview of molecule-based magnetism as a rapidly developing interdisciplinary field, topological symmetry rule as the first principle of spin alignment in organic open-shell systems in the ground state, the proposal of organic through-bond 1D and 2D ferro- and super-paramagnets and the detection of the first organic high-spin molecule, m-phenylenebis(phenylmethylene) in the quintet ground state (S = 2), followed by extended organic high-spin systems with π-conjugation such as aromatic hydrocarbons having S = 3, 4, 5. The paper also describes a theoretical approach to the understanding of electronic spin structures of organic high-spin molecules by invoking both Heisenberg and Hubbard model Hamiltonians, weakly interacting intramolecular high-spin systems from both experimental and theoretical sides, the spin density distribution of the first organic high-spin molecule in terms of electron-nuclear multiple resonance spectroscopy and the detection and characterization of ionic high-spin hydrocarbons, emphasizing the establishment of high spin chemistry underlying organic molecular magnetism. (Communicated by Hiroo INOKUCHI, M.J.A., Feb. 12, 2004)
- 日本学士院の論文
著者
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Takui T
Departments Of Chemistry And Materials Science Graduate School Of Science Osaka City University
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Takui Takeji
Department Of Chemistry Graduate School Of Science Osaka City University
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Takui Takeji
Department Of Chemistry Faculty Of Science Osaka City Univerisity
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工位 武治
Osaka City Univ. Osaka
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Takui Takeji
Departments Of Chemistry And Materials Science Graduate School Of Science Osaka City University
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ITOH Koichi
Department of Chemistry, School of Science and Engineering, Waseda University
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Itoh Koichi
Department Of Cardiology Hitachiomiya Saiseikai Hospital
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Tomonari Taro
Department Of Mathematical And Life Sciences Graduate School Of Science Hiroshima University
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TAKUI Takeji
Departments of Materials Science and Chemistry, Graduate School of Science, Osaka City University
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Itoh Koichi
Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
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