| Project/Area Number |
12650818
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
工業物理化学
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| Research Institution | TOKYO INSTITUTE OF POLYTECHNICS |
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Principal Investigator |
OKANO Mitsutoshi Tokyo Institute of Polytechnics, Lecturer, 工学部, 助教授 (30194377)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2001: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | network / polystannane / sigma-conjugated polymers / Electro-synthesis / absorption spectra / fluorescence |
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| Research Abstract |
Electrochemical reduction of butyl-, octyl-, methyl-, and phenyl-trichloro-stannanes gave corresponding polymers. These polymers were found to be network polystannanes with chlorine atoms as terminal groups.
All the polymers showed absorption which tailed into visible region without peaks. In case of methyl- and phenyl-substituted network polystannanes, absorption in the visible region was weak compared to those of butyl- and octyl-substituted polymers.
Typical temperature dependent absorption of sigma-conjugated network polymers was observed in pentane for all the polymers. At low temperatures, absorption in UV region became weaker and that in visible region became stronger.
Also, typical temperature dependent fluorescence of sigma-conjugated network polymers was observed.
By comparing above results with those of network polysilanes and polygermanes, the following conclusion has been reached. (1) Network sigma-conjugated polymers show similar absorption and fluorescence spectra and their temperature dependence regardless of the center atom. (2) While thermochromic behaviors of dialkyl-substituted linear polymers becomes weaker as the center atom becomes Si to Sn, thermochromic behaviors of network polymers show small center atom dependence.
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