Molecular Conductance through a Quadruple‐Hydrogen‐Bond‐Bridged Supramolecular Junction

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  • Lin Wang
    Key Laboratory of Molecular Nanostructure and Nanotechnology Institute of Chemistry Chinese Academy of Sciences and Beijing National Laboratory for Molecular Sciences Beijing 100190 P.R. China
  • Zhong‐Liang Gong
    CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences and Beijing National Laboratory for Molecular Sciences Beijing 100190 P.R. China
  • Shu‐Ying Li
    Key Laboratory of Molecular Nanostructure and Nanotechnology Institute of Chemistry Chinese Academy of Sciences and Beijing National Laboratory for Molecular Sciences Beijing 100190 P.R. China
  • Wenjing Hong
    Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 3012 Bern Switzerland
  • Yu‐Wu Zhong
    CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences and Beijing National Laboratory for Molecular Sciences Beijing 100190 P.R. China
  • Dong Wang
    Key Laboratory of Molecular Nanostructure and Nanotechnology Institute of Chemistry Chinese Academy of Sciences and Beijing National Laboratory for Molecular Sciences Beijing 100190 P.R. China
  • Li‐Jun Wan
    Key Laboratory of Molecular Nanostructure and Nanotechnology Institute of Chemistry Chinese Academy of Sciences and Beijing National Laboratory for Molecular Sciences Beijing 100190 P.R. China

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<jats:title>Abstract</jats:title><jats:p>A series of self‐complementary ureido pyrimidinedione (UPy) derivatives modified with different aurophilic anchoring groups were synthesized. Their electron transport properties through the quadruple hydrogen bonds in apolar solvent were probed employing the scanning tunneling microscopy break junction (STMBJ) technique. The molecule terminated with a thiol shows the optimal electron transport properties, with a statistical conductance value that approaches 10<jats:sup>−3</jats:sup> G<jats:sub>0</jats:sub>. The <jats:sup>1</jats:sup>H NMR spectra and control experiments verify the formation of quadruple hydrogen bonds, which can be effectively modulated by the polarity of the solvent environment. These findings provide a new design strategy for supramolecular circuit elements in molecular electronics.</jats:p>

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