Bias dependent STM-BJ experiments (Figure ) reveal that at low applied bias (50-150 mV), only the high conductance state is observed. As the applied bias is increased, the low conductance state emerges, consistent with prior work reporting that increased bias regulates dimeric interactions in molecular junctions . The two-state conductance behavior of PPP is also observed in a polar solvent such as propylene carbonate (PC), but with lower counts for each molecular conductance sub-population as the higher dielectric strength of polar solvents likely reduces the effect of the electric field (Figure ). We also characterized the molecular conductance of PPP in PC in the presence of a reducing agent (sodium borohydride, NaBH4), which results in the disappearance of the high conductance state (Supplementary Figure ). Based on these results, we posit that an oxidation event leads to Au-C bond formation and the high conductance state observed for PPP. Bulk electrochemistry, electrolysis, and electron spin resonance were pursued to further understand the origin of the high conductance state.