(color online) The effect of coupling geometry on electrical conductance of Au/(PDT/BPDT/TPDT)/Au junction versus chemical potential of electrodes. (a) Para, and (b) meta configurations; T = 300 K. The inset to panels (a) and (b) denotes the quantity T(ε)(−∂ f/∂ε). The inner inset shows hidden curves of outer inset with more resolution.