Header

UZH-Logo

Maintenance Infos

Driving a Third Generation Molecular Motor with Electrons Across a Surface


Srivastava, Gitika; Štacko, Peter; Mendieta-Moreno, Jesús I; Edalatmanesh, Shayan; Kistemaker, Jos C M; Heideman, G Henrieke; Zoppi, Laura; Parschau, Manfred; Feringa, Ben L; Ernst, Karl-Heinz (2023). Driving a Third Generation Molecular Motor with Electrons Across a Surface. ACS Nano, 17(4):3931-3938.

Abstract

Excitation of single molecules with electrons tunneling between a sharp metallic tip of a scanning tunneling microscope and a metal surface is one way to study and control dynamics of molecules on surfaces. Electron tunneling induced dynamics may lead to hopping, rotation, molecular switching, or chemical reactions. Molecular motors that convert rotation of subgroups into lateral movement on a surface can in principle also be driven by tunneling electrons. For such surface-bound motor molecules the efficiency of motor action with respect to electron dose is still not known. Here, the response of a molecular motor containing two rotor units in the form of overcrowded alkene groups to inelastic electron tunneling has been examined on a Cu(111) surface in ultrahigh vacuum at 5 K. Upon vibrational excitation, switching between different molecular conformations is observed, including conversion of enantiomeric states of chiral conformations. Tunneling at energies in the range of electronic excitations causes activation of motor action and movement across the surface. The expected unidirectional rotation of the two rotor units causes forward movements but with a low degree of translational directionality.

Abstract

Excitation of single molecules with electrons tunneling between a sharp metallic tip of a scanning tunneling microscope and a metal surface is one way to study and control dynamics of molecules on surfaces. Electron tunneling induced dynamics may lead to hopping, rotation, molecular switching, or chemical reactions. Molecular motors that convert rotation of subgroups into lateral movement on a surface can in principle also be driven by tunneling electrons. For such surface-bound motor molecules the efficiency of motor action with respect to electron dose is still not known. Here, the response of a molecular motor containing two rotor units in the form of overcrowded alkene groups to inelastic electron tunneling has been examined on a Cu(111) surface in ultrahigh vacuum at 5 K. Upon vibrational excitation, switching between different molecular conformations is observed, including conversion of enantiomeric states of chiral conformations. Tunneling at energies in the range of electronic excitations causes activation of motor action and movement across the surface. The expected unidirectional rotation of the two rotor units causes forward movements but with a low degree of translational directionality.

Statistics

Citations

Dimensions.ai Metrics
4 citations in Web of Science®
4 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

0 downloads since deposited on 18 Feb 2024
0 downloads since 12 months

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Scopus Subject Areas:Physical Sciences > General Materials Science
Physical Sciences > General Engineering
Physical Sciences > General Physics and Astronomy
Uncontrolled Keywords:General Physics and Astronomy, General Engineering, General Materials Science
Language:English
Date:28 February 2023
Deposited On:18 Feb 2024 15:11
Last Modified:30 Jun 2024 03:32
Publisher:American Chemical Society (ACS)
ISSN:1936-0851
OA Status:Closed
Publisher DOI:https://doi.org/10.1021/acsnano.2c12340
PubMed ID:36794964
Project Information:
  • : FunderSNSF
  • : Grant ID163296
  • : Project TitleSupramolecular Chirality at Surfaces
  • : FunderH2020
  • : Grant ID694345
  • : Project TitleMMDYNASYS - Molecular Motors, powering dynamic functional molecular systems