| Budget Amount *help |
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2000: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1999: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1998: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Research Abstract |
New intercalation compounds composed by layered clay minerals and some aromatic amines were synthesized to explore novel electric conducting organic-inorganic hybrids. Several new intercalation compounds were synthesized the combination of saponite and tetrasilicicfluormica as host clay and 3, 3', 5, 5'-tetramethylbenzidine, N, N, N', N'-tetramethylbenzidine, N, N, N', N'-tetramethylphenylenediamine and 1, 5-diaminonaphthalene as aromatic amines. Formations of stable radicals were observed by ESR measurement. It was found from X-ray powder diffraction analyses that the tertiary amines lie between the interlayer space as the molecular planes are parallel to layer. On the other hand, it was showed that the primary amines stand on the layer.
These intercalation compounds of the two primary amines, 3, 3', 5, 5'-tetramethylbenzidine and 1, 5-diaminonaphthalene, showed relatively high electric conductivity (in the region of semiconductor). For both compounds, this conductivity is considered to be assisted by water existing between the layer because they showed extremely low conductivity less than 10^<-10> Sm^<-1> under vacuum. The electric conductivity in 3, 3', 5, 5'-tetramethylbenzidine-tetrasilicicfluormica decreased gradually under DC condition but 1, 5-diaminonaphthalene-saponite showed a constant value at least for a few hours under the same condition. This fact suggests that the conduction is mainly determined by proton transfer between ammonium and amine in the former compound. On the other hand, the electron transfer is the main conduction mechanism in the later compound.
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