Polyacetylene

Polyacetylene

Fixed

Polyethin (including polyacetylene, abbreviated PAC ) is a polymer of ethyne. There are three Polyethinisomere, the trans - Polyethin, the cis and the cis - cisoid Polyethin Polyethin, however, which is unstable. Polyethin is an electrical insulator; can be obtained by doping a conductivity of the silver, the metal with the best electrical conductivity equivalent. Doped Polyethin was the first polymer, it was observed in the electrical conductivity.

Doped (conductive ) Polyethin reacts in air with oxygen and thereby loses its conductivity. Because of this Luftunbeständigkeit it has nowadays hardly significance, it was supplanted by later discovered semiconducting polymers such as polypyrrole, polyaniline, polyphenylene, polythiophene, polyfluorene and.

Historical Information

Giulio Natta polymerized acetylene in 1958 for the first time to Polyethin. Alan Heeger and Alan MacDiarmid from the U.S. and Hideki Shirakawa of Japan showed in 1976 that it comes at a doping of Polyethins with oxidizing agents to a very sharp increase in the electrical conductivity. The three scientists were awarded the 2000 Nobel Prize in Chemistry for their work in the development of electrically conductive polymers.