Mechanical Stretching-Induced Electron-Transfer Reactions and Conductance Switching in Single Molecules

Yueqi Li, Naomi L. Haworth, Limin Xiang, Simone Ciampi, Michelle L. Coote, Nongjian Tao

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

A central idea in electron-transfer theories is the coupling of the electronic state of a molecule to its structure. Here we show experimentally that fine changes to molecular structures by mechanically stretching a single metal complex molecule via changing the metal-ligand bond length can shift its electronic energy levels and predictably guide electron-transfer reactions, leading to the changes in redox state. We monitor the redox state of the molecule by tracking its characteristic conductance, determine the shift in the redox potential due to mechanical stretching of the metal-ligand bond, and perform model calculations to provide insights into the observations. The work reveals that a mechanical force can shift the redox potential of a molecule, change its redox state, and thus allow the manipulation of single molecule conductance.

Original languageEnglish (US)
Pages (from-to)14699-14706
Number of pages8
JournalJournal of the American Chemical Society
Volume139
Issue number41
DOIs
StatePublished - Oct 18 2017

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Stretching
Oxidation-Reduction
Electrons
Molecules
Metals
Ligands
Coordination Complexes
Bond length
Electronic states
Metal complexes
Molecular Structure
Electron energy levels
Molecular structure

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Mechanical Stretching-Induced Electron-Transfer Reactions and Conductance Switching in Single Molecules. / Li, Yueqi; Haworth, Naomi L.; Xiang, Limin; Ciampi, Simone; Coote, Michelle L.; Tao, Nongjian.

In: Journal of the American Chemical Society, Vol. 139, No. 41, 18.10.2017, p. 14699-14706.

Research output: Contribution to journalArticle

Li, Yueqi ; Haworth, Naomi L. ; Xiang, Limin ; Ciampi, Simone ; Coote, Michelle L. ; Tao, Nongjian. / Mechanical Stretching-Induced Electron-Transfer Reactions and Conductance Switching in Single Molecules. In: Journal of the American Chemical Society. 2017 ; Vol. 139, No. 41. pp. 14699-14706.
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