Switching the conductance of a molecular junction using a proton transfer reaction

Original Paper
Part of the following topical collections:
  1. Topical Collection on the occasion of Prof. Tim Clark’s 65th birthday

Abstract

A novel mechanism for switching a molecular junction based on a proton transfer reaction triggered by an external electrostatic field is proposed. As a specific example to demonstrate the feasibility of the mechanism, the tautomers [2,5-(4-hydroxypyridine)] and {2,5-[4(1H)-pyridone]} are considered. Employing a combination of first-principles electronic structure calculations and Landauer transport theory, we show that both tautomers exhibit very different conductance properties and realize the “on” and “off” states of a molecular switch. Moreover, we provide a proof of principle that both forms can be reversibly converted into each other using an external electrostatic field.

Keywords

Charge transport Density functional theory Molecular electronics Molecular switch Single molecule junction 

Notes

Acknowledgments

This work has been supported by the the German-Israeli Foundation for Scientific Development (GIF), the Deutsche Forschungsgemeinschaft (DFG) through the Cluster of Excellence “Engineering of Advanced Materials” (EAM), SFB 953 and a research grant, as well as projects, CTQ2012-36966 (MICINN), and UAH2011/EXP-041 (UAH). ALS acknowledges the research grant of the National Science Centre of Poland 2011/01/M/ST2/00561. Generous allocation of computing time at the computing centers in Erlangen (RRZE), Munich (LRZ), and Jülich (JSC) is greatly acknowledged.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Institute of Theoretical Physics and Interdisciplinary Center for Molecular MaterialsFriedrich-Alexander-Universität Erlangen-NürnbergErlangenGermany
  2. 2.Institut für Theoretische PhysikGöttingenGermany
  3. 3.Institute of PhysicsPolish Academy of SciencesWarsawPoland

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