Formation and Functions of Self-Assembled Molecular Systems of Supramolecular Ions and Inherent Electrons

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We introduced supramolecular cations composed of inorganic cations and crown ethers into [Ni(dmit)2 crystals and developed novel molecular systems in which electronic condction and ionic conduction coexisted.We also regulated [Ni(dmit)_2]^- assemblies in the crystal utilizing supramolecular cation structures and revealed that we could control magnetic and electronic properties through the molecular-assembly control.To develop nanometer-size materials and devices from molecular charge transfer complexes, we investigated the formation of molecular films of charge transfer complexes. Especially, we used Langmuir-Blodgett method and succeeded in forming single-component conducting films. In addition, we studied self-assembly monolayers in which TTF skeleton directly attached to gold surface. We found that when we apply the Langmuir-Blodgett method to macrocyclic TTF molecule that has ion-recognition ability, the molecules forms nanowire structures. Moreover, when we used mica substrates, the nanowires recognized ionic array of the surface and oriented specific directions. These results strongly indicate that the molecular charge transfer complexes are quite useful to developing future molecular electronic devices.