By P. Bernier
This edited paintings includes 8 large, review-type contributions by means of major scientists within the box of artificial metals. The authors have been invited by way of the organisers of the foreign convention on technology and know-how of man-made Metals '98 (ICSM'98) to study the development of study some time past 20 years in a unifying and pedagogical demeanour. the current paintings highlights the state of the art of the sphere and assesses the customers for destiny learn.
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Extra info for Advances in Synthetic Metals: Twenty years of progress in science and technology
Recent work from Gr6sser and Hirsch introduced new oL,o~-dicyanooligoynes by reaction of dicyane and carbon vapor under the conditions of fullerene synthesis . Other hybrid structures of carbynes and polyacetylenes include polydiacetylenes 38. Unlike polyacetylene, polydiacetylenes can be made as macroscopic, perfect, deeply colored single crystals upon exposure of transparent, singly crystalline diacetylene monomers to heat or UV irradiation . Topochemical polymerization occurs by 1,4-addition of the diacetylene subunits 37, whereby the resulting extended chain 38 can be described by two mesomeric forms (scheme 6).
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 . Due to the large number of possible technical applications, much effort has been made to tailor the properties of PT by synthesis.
Nevertheless, the Wessling-Zimmermann method has proven of extreme value not only for the design of the emitter components in organic LEDs, but also of photoconducting materials [ 111 ] or of polymer layers with high electrical conductivity after doping . The scope of the reaction is somewhat limited by the character of the initial elimination. , for the transformation of 63 into 17, it does not occur for the meta-case 65 or the biphenyl case 66 because of the high energy of the elimination product (see chart 14) .
Advances in Synthetic Metals: Twenty years of progress in science and technology by P. Bernier