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Electric-field control of single-molecule tautomerization

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2020

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Mangel, Shai
Polyudov, Katharina
Wollandt, Tobias
Punke, Paul
Urcuyo, Roberto
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Physical Chemistry Chemical Physics. Royal Society of Chemistry (RSC). 2020, 22(11), pp. 6370-6375. ISSN 1463-9076. eISSN 1463-9084. Available under: doi: 10.1039/C9CP06868F

Zusammenfassung

The electric field is an important parameter to vary in a single-molecule experiment, because it can directly affect the charge distribution around the molecule. Yet, performing such an experiment with a well-defined electric field for a model chemical reaction at an interface has proven to be extremely difficult. Here, by combining a graphene field-effect transistor and a gate-tunable scanning tunneling microscope (STM), we reveal how this strategy enables the intramolecular H atom transfer of a metal-free macrocycle to be controlled with an external field. Experiments and theory both elucidate how the energetic barrier to tautomerization decreases with increasing electric field. The consistency between the two results demonstrates the potential in using electric fields to engineer molecular switching mechanisms that are ubiquitous in nanoscale electronic devices.

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530 Physik

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ISO 690MANGEL, Shai, Maxim SKRIPNIK, Katharina POLYUDOV, Christian DETTE, Tobias WOLLANDT, Paul PUNKE, Dongzhe LI, Roberto URCUYO, Fabian PAULY, Klaus KERN, 2020. Electric-field control of single-molecule tautomerization. In: Physical Chemistry Chemical Physics. Royal Society of Chemistry (RSC). 2020, 22(11), pp. 6370-6375. ISSN 1463-9076. eISSN 1463-9084. Available under: doi: 10.1039/C9CP06868F
BibTex
@article{Mangel2020-03-18Elect-48936,
  year={2020},
  doi={10.1039/C9CP06868F},
  title={Electric-field control of single-molecule tautomerization},
  number={11},
  volume={22},
  issn={1463-9076},
  journal={Physical Chemistry Chemical Physics},
  pages={6370--6375},
  author={Mangel, Shai and Skripnik, Maxim and Polyudov, Katharina and Dette, Christian and Wollandt, Tobias and Punke, Paul and Li, Dongzhe and Urcuyo, Roberto and Pauly, Fabian and Kern, Klaus}
}
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