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Investigation of novel routes to polyene structures

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Conjugated polymers, either olefinic or aromatic, have proven to be electrically conductive after doping. Due to their intractability, the doping process typically involves the treatment of an insoluble material with a solution containing an oxidizing or reducing agent, which then creates cations or anions that are incorporated in the Pi-system, via a surface reaction. Nevertheless, doped polyacetylene shows electrical conductivities that are similar to those of metals.
The synthesis leading to the structurally most regular polyacetylene involves a ring-opening metathesis reaction (ROMP) to a precursor polymer which forms polyacetylene in an extrusion reaction. One idea in this regard is to make a polyacetylene accessible, which would automatically dope itself upon formation.
This project is aimed at studying the ROMP of substituted
bicyclo(6.1.0)nona- 2,4,6-triene (1). Precursor polymer 2 is anticipated to be soluble and therefor processible; it should furnish a polyacetylene carrying a positive charge every ninth carbon atom via the
cyclopropyl/allyl isomerization, thus cationic species will be created not at the surface as in common doping processes but in the bulk of the material as a whole.

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RGI - Research grants (individual fellowships)

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UNIVERSITY OF DURHAM
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