Analysis of Single Molecule Conductance of Heterogeneous Porphyrin Arrays by Partial Transmission Probabilities

作者：Tamaki Takashi; Ohto Tatsuhiko; Yamada Ryo; Tada Hirokazu; Ogawa Takuji^*

来源：ChemistrySelect, 2017, 2(25): 7484-7488.

DOI：10.1002/slct.201701015

• break-junction method
• molecular electronics
• porphyrin
• single-molecule studies
• transmission probability

Single molecule conductance (SMC) of a series of porphyrin derivatives, whose porphyrin units are connected through a phenylene bridge that have one or two thiolate end groups, was measured by a scanning tunneling microscopic break junction (STM-BJ) technique. The observed conductance values were analyzed by partial transmission probabilities (T-i) for the molecular parts using the equation G=G(0)Pi T-N(i)i. Unique combination of Ti was obtained, which indicates the validity of this analysis. By the analysis, the free-base porphyrin ring interacting with the gold electrode was found to show a greater transmission probability Tpor-Au than that of the bridge between thiolate and the gold electrode (TS-Au).

• 出版日期2017-8-31