Graphene nanoribbon precursors and monomers suitable for preparation thereof

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, Cl, 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.

1 . A graphene nanoribbon obtained by cyclodehydrogenation, in solution or on a metal surfgace, of a precursor comprising repeat 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, Cl, 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.