Advanced Materials

A Crown-Ether Loop-Derivatized Oligothiophene Doubly Attached on Gold Surface as Cation-Binding Switchable Molecular Junction

Authors

  • Truong Khoa Tran,

    1. LUNAM, University of Angers, CNRS UMR 6200, MOLTECH-Anjou, Group Linear Conjugated Systems, 2 Bd Lavoisier, 49045 Angers cedex, France
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  • Kacem Smaali,

    1. Institute for Electronics Microelectronics & Nanotechnology, CNRS, University of Sciences and Technologies of Lille, BP60069, Avenue Poincaré, 59652 Villeneuve d'Ascq, France
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  • Marie Hardouin,

    1. LUNAM, University of Angers, CNRS UMR 6200, MOLTECH-Anjou, Group Linear Conjugated Systems, 2 Bd Lavoisier, 49045 Angers cedex, France
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  • Quentin Bricaud,

    1. LUNAM, University of Angers, CNRS UMR 6200, MOLTECH-Anjou, Group Linear Conjugated Systems, 2 Bd Lavoisier, 49045 Angers cedex, France
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  • Maïténa Oçafrain,

    1. LUNAM, University of Angers, CNRS UMR 6200, MOLTECH-Anjou, Group Linear Conjugated Systems, 2 Bd Lavoisier, 49045 Angers cedex, France
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  • Philippe Blanchard,

    Corresponding author
    1. LUNAM, University of Angers, CNRS UMR 6200, MOLTECH-Anjou, Group Linear Conjugated Systems, 2 Bd Lavoisier, 49045 Angers cedex, France
    • LUNAM, University of Angers, CNRS UMR 6200, MOLTECH-Anjou, Group Linear Conjugated Systems, 2 Bd Lavoisier, 49045 Angers cedex, France
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  • Stéphane Lenfant,

    Corresponding author
    1. Institute for Electronics Microelectronics & Nanotechnology, CNRS, University of Sciences and Technologies of Lille, BP60069, Avenue Poincaré, 59652 Villeneuve d'Ascq, France
    • Institute for Electronics Microelectronics & Nanotechnology, CNRS, University of Sciences and Technologies of Lille, BP60069, Avenue Poincaré, 59652 Villeneuve d'Ascq, France.
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  • Sylvie Godey,

    1. Institute for Electronics Microelectronics & Nanotechnology, CNRS, University of Sciences and Technologies of Lille, BP60069, Avenue Poincaré, 59652 Villeneuve d'Ascq, France
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  • Jean Roncali,

    Corresponding author
    1. LUNAM, University of Angers, CNRS UMR 6200, MOLTECH-Anjou, Group Linear Conjugated Systems, 2 Bd Lavoisier, 49045 Angers cedex, France
    • LUNAM, University of Angers, CNRS UMR 6200, MOLTECH-Anjou, Group Linear Conjugated Systems, 2 Bd Lavoisier, 49045 Angers cedex, France
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  • Dominique Vuillaume

    Corresponding author
    1. Institute for Electronics Microelectronics & Nanotechnology, CNRS, University of Sciences and Technologies of Lille, BP60069, Avenue Poincaré, 59652 Villeneuve d'Ascq, France
    • Institute for Electronics Microelectronics & Nanotechnology, CNRS, University of Sciences and Technologies of Lille, BP60069, Avenue Poincaré, 59652 Villeneuve d'Ascq, France.
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  • Dedicated to the memory of Dr. Nuria Gallego-Planas

Abstract

A crown-ether dithiol quaterthiophene is synthesized and immobilized on gold surface by double covalent fixation. UV-vis spectroscopy and cyclic voltammetry show that the corresponding dithioester precursor can complex Pb2+ in solution and that this property is maintained for monolayers of the dithiol on gold. Current-voltage measurements by eutectic GaIn drop contact on the monolayer show a significant increase (up to 1.6 × 103 times) of the current at low bias after Pb2+ complexation.

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