Single-molecule electric switching induced by acid-base reaction

Yuki Yoshihara, Shintaro Fujii, Shuhei Higashibayashi, Manabu Kiguchi, Tomoaki Nishino

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Electric switches are one of the most fundamental electric circuitries. Recent developments in single-molecule techniques allow us to study various electric-switching phenomena on the single-molecule scale. In this study, the switch of the current through a single molecule of a biphenothiazine derivative was investigated using the break junction technique. The biphenothiazine derivative undergoes acid-base reaction-induced electronic modulation due to the reversible structural transformation between a closed shell and an open shell, resulting in a change in the electronic gap and effective tunneling barrier height. We succeeded in controlling the single-molecule electric conductivity of the biphenothiazine derivative wired to two Au electrodes by allowing the reaction to proceed reversibly on the electrode.

Original languageEnglish
Pages (from-to)1271-1273
Number of pages3
JournalChemistry Letters
Issue number6
Publication statusPublished - 2021 Jun 5


  • Acid-base reaction
  • Break junction
  • STM

ASJC Scopus subject areas

  • General Chemistry


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