2D conductance histograms for amino-p-terphenyl derivatives indicate stark differences in electron transport pathways for different molecular composition. Notably, the high conductance state observed in PPP is significantly diminished or absent in all other singly anchored p-terphenyl molecules studied in this work (Figure and Supplementary Figure ), suggesting that molecular substituents disrupt the high conductance pathway in PPP. Although PPM and PMP show a weak high conductance feature, it is completely absent in MPP, implying that the presence of a methyl group at the para position on the aromatic ring abolishes the high conductance pathway. Oriented external electric fields are known to stabilize charge resonance structures and catalyze chemical reactions . It is possible that the quinoidal resonant form of the axisymmetric molecule PPP is relevant for electron transport, with electron density redistributing towards the para position on the phenyl ring farthest from the amine anchor.