We next turn to check the literature results of those fitted based on Eq 1. Figure is the study done by Luka-Guth et al who studied the role played by the solvent in the transport of the single molecular junction. This molecular junction exhibits high energy offset and low coupling strength, similar to C8DT molecular junction (figure ). The fitting results are quite the same for all the three methods, which is reasonable for the high energy offset situation. However, for the coupling, our fitting results are significantly higher than the literature results. This spotted difference could is possibly related to the influence of energy step size in the numerical integration. We believe Luka-Guth et al did not use small enough step size when performing numerical fitting in their model study (see supporting information figure S6 for the fitting using big integration step ~0.032 eV). This obtained results in this situation emphasize on caution that should be taken on choosing energy step size for numerical simulation of tunneling transport. We propose a very small step sized as shown in section 0.2.