Fig. 1. (a) The molecular structure of FP3: the edge-fused porphyrin trimer core is functionalized in the terminal meso positions by tridodecyloxypyrene groups for anchoring to graphene source and drain electrodes. Ar groups are solubilizing aryl groups, 3,5-bis(trihexylsilyl)phenyl. (b) Device architecture: nanometer-separated graphene source and drain electrodes are electroburnt from a graphene ribbon between two gold electrodes. The graphene is patterned into a bowtie shape, and a local gate electrode separated from the molecule by a thin layer of HfO₂ (grey) is used to shift the molecular energy levels. For clarity, the bulky side-groups are omitted.