Fig. 1
From: Directing isomerization reactions of cumulenes with electric fields
Conductance measurements of cumulene isomers in solution. a Schematic of the STM setup and the electric field distribution between the STM tip and substrate (green line). b Illustration of the single-molecule junctions with DFT-optimized structures of cis[3] and trans[3] showing distinct S–S distance. The electrodes are model structures not included in the calculations. c Logarithm-binned 1D histograms for cis[3] (red) and trans[3] (blue) measured in tetradecane at a 0.1 V bias created by compiling 5000 and 9000 conductance traces, respectively. Inset: example conductance vs. displacement traces of cis[3] (red) and trans[3] (blue). d, e 2D conductance-displacement histograms for cis[3] and trans[3], respectively, created by overlaying conductance traces after aligning them at a conductance of 0.5 G0. Inset of d and e: normalized displacement profiles of cis[3] (red) and trans[3] (blue), respectively, determined from the 2D histograms. The 80th percentile junction length is 0.55 nm for cis[3] and 1.15 nm for trans[3] as indicated by the dashed lines
