In 1977, Shirakawa and co-workers reported that thin films of the semi-conducting polymer polyacetylene show a dramatic increase in electrical conductivity when doped with controlled amounts of iodine.1) Their reports triggered intensive R&D into the electrical conductivity of plastic materials. Studies of conducting polymers began and, as a result, many π-conjugated polymers such as polypyrrole2), polythiophene3), polyaniline4) and polyphenylenevinylene5) have been developed. Among these polymers, many of them have been utilized practically. One example is an electrolytic condenser using polypyrrole. This condenser has characteristic features such as being compact and lightweight,
as well as having high-capacity and high-frequency compliance. These features have achieved a downsizing and weight-saving in electronic devices, and are utilized currently in some mobile phones. Thereby, conducting polymers are widely used for electronic devices vital to our everyday life. These and many other achievements were the reasons Shirakawa received to the Nobel Prize Award in 2000.
Recent studies have found that polyphenylenevinylene shows electroluminescence. Also the synthesis of a spiral structure helical polyacetylene has been achieved. Further active studies are underway, looking to discover new features and properties of these conducting polymers.
The page below shows the monomers and oligomers for conducting polymer research.
3-Alkyl Thiophenes
Related Thiophene Derivatives
Pyrroles
Carbazoles
Others
3-Alkyl Thiophenes
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Related Thiophene Derivatives
Pyrroles
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Carbazoles
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Others
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(see also Reagents for High-Performance Polymer Research)
Acetylenes
Literature
2) K. K. Kanazawa, A. F. Diaz, R. H. Geiss, W. D. Gill, J. F. Kwak, J. A. Logan, J. F. Rabolt, G. B. Street, J. Chem. Soc., Chem. Commun., 1979, 854 [DOI]; M. Salmon, A. F. Diaz, J. A. Logan, K. Krounbi, J. Bargon, Mol. Cryst. Liq. Cryst., 1982, 83, 265 [DOI]; M. Ogasawara, K. Funahashi, T. Demura, T. Hagiwara, K. Iwata, Synth. Met., 1986, 14, 61 [DOI].
3) M. Sato, S. Tanaka, K. Kaeriyama, J. Chem. Soc., Chem. Commun., 1985, 713 [DOI]; S. Hotta, Synth. Met., 1987, 22, 103 [DOI].
4) T. Kobayashi, H. Yoneyama, H. Tamura, J. Electroanal. Chem., 1984, 177, 281 [DOI]; J.-C. Chiang, A. G. MacDiarmid, Synth. Met., 1986, 13, 193 [DOI].
5) G. E. Wnek, J. C. W. Chien, F. E. Karasz, C. P. Lillya, Polymer, 1979, 20, 1441 [DOI]; D. R. Ganon, J. D. Capistran, F. E. Karasz, R. W. Lenz, S. Antoun, Polymer, 1987, 28, 567 [DOI].
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