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Analysis of Single Molecule Conductance of Heterogeneous Porphyrin Arrays by Partial Transmission Probabilities
Author(s) -
Tamaki Takashi,
Ohto Tatsuhiko,
Yamada Ryo,
Tada Hirokazu,
Ogawa Takuji
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201701015
Subject(s) - conductance , porphyrin , transmission (telecommunications) , molecule , chemical physics , chemistry , materials science , physics , computer science , photochemistry , telecommunications , condensed matter physics , organic chemistry
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∏ i N T i . Unique combination of T i 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 T por‐Au than that of the bridge between thiolate and the gold electrode ( T S‐Au ).