  Fine management of chiral processes on solid surfaces has progressed over the
years, yet still faces the need for the controlled and selective production of
advanced chiral materials. Here, we report on the use of enantiomerically
enriched molecular building blocks to demonstrate the transmission of their
intrinsic chirality along a sequence of on-surface reactions. Triggered by
thermal annealing, the on-surface reac-tions induced in this experiment involve
firstly the coupling of the chiral reactants into chiral polymers and
subsequently their transformation into planar prochiral graphene nanoribbons.
Our study reveals that the axial chirality of the reactant is not only
transferred to the polymers, but also to the planar chirality of the graphene
nanoribbon end products. Such chirality transfer consequently allows, starting
from ad-equate enantioenriched reactants, for the controlled production of
chiral and prochiral organic nanoarchi-tectures with pre-defined handedness.
