  It is understood that molecular conjugation plays an important role in charge
transport through single-molecule junctions. Here, we investigate electron
transport through an anthraquinone based single-molecule three-terminal device.
With the use of an electric-field induced by a gate electrode, the molecule is
reduced resulting into a ten-fold increase in the off-resonant differential
conductance. Theoretical calculations link the change in differential
conductance to a reduction-induced change in conjugation, thereby lifting
destructive interference of transport pathways.
