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Three site molecular orbital controlled single-molecule rectifiers based on perpendicularly linked porphyrin-imide dyads.

Authors
  • Handayani, Murni1
  • Tanaka, Hirofumi2
  • Katayose, Shinichi3
  • Ohto, Tatsuhiko4
  • Chen, Zhijin3
  • Yamada, Ryo4
  • Tada, Hirokazu4
  • Ogawa, Takuji3
  • 1 Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan. [email protected] and Indonesian Institute of Sciences (LIPI), Research Center for Metallurgy and Materials, Building 470, PUSPIPTEK Area, Cisauk, Tangerang Selatan, Banten 15314, Indonesia. , (Indonesia)
  • 2 Department of Human Intelligence Systems, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu, Kitakyushu 808-0196, Japan. , (Japan)
  • 3 Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan. [email protected] , (Japan)
  • 4 Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan. , (Japan)
Type
Published Article
Journal
Nanoscale
Publisher
The Royal Society of Chemistry
Publication Date
Dec 21, 2019
Volume
11
Issue
47
Pages
22724–22729
Identifiers
DOI: 10.1039/c9nr07105a
PMID: 31750493
Source
Medline
Language
English
License
Unknown

Abstract

The original single-molecule rectifier proposed by Aviram and Ratner is based on a donor-σ-acceptor structure, in which σ functions as the insulator to disconnect the π electronic systems of the two parts. However, there have been no reports on experimentally demonstrated highly efficient single-molecule rectifiers based on this mechanism. In this paper, we demonstrate single-molecule rectifiers with perpendicularly connected metal porphyrin-imide dyads. Our proposed molecule rectifiers use hydroxyl groups at both ends as weak anchoring groups. Measurements of the single-molecule current-voltage characteristics of these molecules clearly show that the rectification ratio reached a high value of 14 on average. Moreover, the ratio could be tuned by changing the central metal in the porphyrin core. All of these features can be explained by the energy-level shift of the molecular orbital using a model with three electronic parts.

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