| abstract |
Provided are graphene nanoribbon precursors comprising repeated units of the general formula (I) in which R 1 , R 2 are each H, halogen, -OH, -NH 2 , -CN, -NO 2 or a hydrocarbyl radical which has 1 to 40 carbon atoms and may be linear or branched, saturated or unsaturated and mono- or poly-substituted by halogen (F, CI, Br, I), -OH, -NH 2 , -CN, and/or -NO 2 , where one or more CH 2 groups may also be replaced by -O-, -S-, -C(O)O-, -O-C(O)-, -C(O)-, -NH- or -NR-, in which R is an optionally substituted C 1 C 40 -hydrocarbyl radical, or an optionally substituted aryl, alkylaryl or alkoxyaryl radical. (I). |