By Bernier P. (ed.), Lefrant S. (ed.), Bidan G. (ed.)
This edited paintings includes 8 broad, review-type contributions through major scientists within the box of artificial metals. The authors have been invited by means of the organisers of the foreign convention on technology and expertise of artificial Metals '98 (ICSM'98) to study the growth of analysis long ago 20 years in a unifying and pedagogical demeanour. the current paintings highlights the cutting-edge of the sector and assesses the clients for destiny examine.
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The absorption spectra of polyphenylenes sensitively reflect the increasing planarization of the w-conjugated frame. Thus, poly(para-2,5-di-n-alkylphenylene) 53 appears colorless in solution with an absorption maximum hma x of 280 nm , the absorption of poly(2,7-fluorene) 49 is located at 380 nm , polytetrahydropyrene 50 exhibits a hmax of 385 nm  and the LPPP 52 of Scherf is deep yellow with hmax of 438 -- 450 nm  (depending on the substituent on the methylene bridge) (chart 10).
20 Years of "Synthetic Metals" Me2N~ 41 ~~~---CN 85 Chart15 4-Dimethylamino-4'-cyanostilbene 85. molecular wires  and antennas, and underline the importance of this conjugated polymer. 5. Polythiophene Polythiophene (PT) 20 can be regarded as a hybrid structure of cis-polyacetylene and sulfur, where the incorporation of the heteroatom leads to a much higher environmental stability of PT compared with that of PA [ 131 ]. The outstanding physical and bulk properties make PT a desirable material for device applications like sensors, energy storage, solar cells, LEDs, NLO devices, and more .
A huge number of differently substituted PTs have been synthesized, characterized, and their scope for potential applications has been tested. A complete and detailed review of this vast scientific research is far beyond the limits of this text, interested readers are refered to the literature [ 148]. The synthesis of oligothiophenes has become more and more important since it was found that some of their physical properties even surpass those of the polymers. An example for the importance of oligomer synthesis is the all oLlinked sexithiophene, which has been used in an organic field-effect transistor and in a light modulating device due to the superior charge carrier mobility compared to the polymer .
Advances In Synthetic Metals. Twenty Years of Progress in Science and Technology by Bernier P. (ed.), Lefrant S. (ed.), Bidan G. (ed.)