title: Molecular Conductance through a Quadruple-Hydrogen-Bond-Bridged Supramolecular Junction.
abstract: 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)  G0 . 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.
authors: 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.|University of the Chinese Academy of Sciences, Beijing, 100049, P.R. China.|Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland.
authors: Lin
authors: L
authors: Wang
authors: CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences and, Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P.R. China.|University of the Chinese Academy of Sciences, Beijing, 100049, P.R. China.
authors: Zhong-Liang
authors: ZL
authors: Gong
authors: 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.|University of the Chinese Academy of Sciences, Beijing, 100049, P.R. China.
authors: Shu-Ying
authors: SY
authors: Li
authors: Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland. whong@xmu.edu.cn.|Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P.R. China. whong@xmu.edu.cn.
authors: Wenjing
authors: W
authors: Hong
authors: CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences and, Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P.R. China. zhongyuwu@iccas.ac.cn.|University of the Chinese Academy of Sciences, Beijing, 100049, P.R. China. zhongyuwu@iccas.ac.cn.
authors: Yu-Wu
authors: YW
authors: Zhong
authors: 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. wangd@iccas.ac.cn.|University of the Chinese Academy of Sciences, Beijing, 100049, P.R. China. wangd@iccas.ac.cn.
authors: Dong
authors: D
authors: Wang
authors: 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.|University of the Chinese Academy of Sciences, Beijing, 100049, P.R. China.
authors: Li-Jun
authors: LJ
authors: Wan
keywords: electron transport; hydrogen bonds; molecular electronics; single-molecule junctions