Electronic Structure of Conductive and Conjugated Polymers
Ordinary polymers are used predominantly as insulators and will continue to be in the future. The discovery of high conductivity in change-transfer complexes formed with polyacetylene (PA) in 1977 [1,2] has aroused considerable excitement among polymer scientists and condensed matter physicists throughout the world. Although insulating carbon-chain polymers have a saturated electronic structure in which all of the four carbon valence electrons are combined in covalent bonds, conducting carbon-chain polymers have a conjugated structure in which sp2 + pz hybridization leads to one unpaired electron per carbon atom. The delocalized (extended) π-electrons form a band structure which exhibits semiconducting or even metallic properties.
KeywordsMicrowave Graphite Soliton Pyrolysis Oligomer
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