The destabilization of hydrogen bonds in an external E-field for improved switch performance
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The effect of an electric field on a recently proposed molecular switch based on a quinone analogue was investigated using next‐generation quantum theory of atoms in molecules (QTAIM) methodology. The reversal of a homogenous external electric field was demonstrated to improve the “OFF” functioning of the switch. This was achieved by destabilization of the H atom participating in the tautomerization process along the hydrogen bond that defines the switch. The “ON” functioning of the switch, from the position of the tautomerization barrier, is also improved by the reversal of the homogenous external electric field: this result was previously inaccessible. The “ON” and “OFF” functioning of the switch was visualized in terms of the response of the most preferred directions of motion of the electronic charge density to the applied external field. All measures from QTAIM and the stress tensor provide consistent results for the factors affecting the “ON” and “OFF” switch performance. Our analysis therefore demonstrates use for future design of molecular electronic devices.
Xu , T , Momen , R , Azizi , A , van Mourik , T , Früchtl , H , Kirk , S R & Jenkins , S 2019 , ' The destabilization of hydrogen bonds in an external E-field for improved switch performance ' , Journal of Computational Chemistry , vol. Early View . https://doi.org/10.1002/jcc.25843
Journal of Computational Chemistry
Copyright © 2019 Wiley Periodicals, Inc. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1002/jcc.25843
DescriptionThe National Natural Science Foundation of China is acknowledged, project approval number: 21673071. The One Hundred Talents Foundation of Hunan Province are gratefully acknowledged for the support of S.J. and S.R.K. The Royal Society is thanked by S.J., S.R.K, T.X, T.v.M, and H.F. for support through an International Exchanges grant. We thank EaStCHEM for computational support via the EaStCHEM Research Computing Facility.
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