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

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• 作者：Lin Wang ; Dr. Zhong-Liang Gong ; Shu-Ying Li ; Prof. Wenjing Hong ; Prof. Yu-Wu Zhong ; Prof. Dong Wang and Prof. Li-Jun Wan
• 刊名：Angewandte Chemie
• 出版年：2016
• 出版时间：September 26, 2016
• 年：2016
• 卷：128
• 期：40
• 页码：12581-12585
• 全文大小：1334K
• ISSN：1521-3757

文摘

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 ¹H 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.