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Molecular Conductance through a Quadruple‐Hydrogen‐Bond‐Bridged Supramolecular Junction
Author(s) -
Wang Lin,
Gong ZhongLiang,
Li ShuYing,
Hong Wenjing,
Zhong YuWu,
Wang Dong,
Wan LiJun
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201605622
Subject(s) - supramolecular chemistry , conductance , hydrogen bond , electron transport chain , scanning tunneling microscope , chemistry , molecule , molecular electronics , chemical physics , break junction , solvent , polarity (international relations) , crystallography , nanotechnology , materials science , organic chemistry , condensed matter physics , biochemistry , physics , cell
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 −3 G 0 . The 1 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.