| abstract |
A conjugated polymer has a repeated unit having the structure of formula (I) where in n is an integer greater than 1, R 1 and R 2 are independently selected from alkyl groups with up to 18C atoms, aryls and substituted aryls, and wherein Ar is selected from monocyclic, bicyclic and polycyclic arylene, or monocyclic, bicyclic and polycyclic heteroarylene, or may contain one to five such groups, either fused or linked. |