Iizuka Tomoya, Shimizu Daiki, Matsuda Kenji
Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University Katsura, Nishikyo-ku Kyoto 615-8510 Japan
RSC Adv. 2020 Jun 9;10(37):22054-22057. doi: 10.1039/d0ra04484a. eCollection 2020 Jun 8.
Single molecular conductance of molecular wires is effectively evaluated by the combination of STM apparent height measurement and a 2-D phase separation technique. Previously the method was only applied to a set of molecular wires with the same physical length, but herein we applied the method to thienylene-based and phenylene-based molecular wires with different physical lengths. By considering the difference in physical molecular height including thermal contribution of conformational isomers, the conductance ratio was determined to be 1.3 ± 0.7, which is in agreement with the reported value determined by a break-junction method.
通过扫描隧道显微镜（STM）表观高度测量和二维相分离技术相结合，有效地评估了分子线的单分子电导。此前，该方法仅应用于一组具有相同物理长度的分子线，但在此我们将该方法应用于具有不同物理长度的噻吩基和亚苯基分子线。通过考虑包括构象异构体热贡献在内的物理分子高度差异，确定电导比为1.3±0.7，这与通过断结法确定的报道值一致。
