Figure 13.

Supramolecular templating effect to steer the growth of covalent networks. (a) The alignment of DBTP precursors in a supramolecular phase is preserved upon annealing and stepwise formation of perfectly aligned polyphenylene chains and fused nanoribbons. (b) The formation of rylene-type graphene nanoribbons from QR precursors at low coverage produces a variety of different bonding configurations. At nearly one monolayer coverage (c), the selectivity toward straight nanoribbon (type I) formation is significantly enhanced due to steric repulsion. (a) Adapted with permission from ref (191). Copyright 2015 American Chemical Society. (b, c) Adapted with permission from ref (193). Copyright 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.