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arXiv · 1210.1829

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

Truong Khoa Tran·Kacem Smaali·Marie Hardouin·Quentin Bricaud·Maitena Ocafrain·Philippe Blanchard·Stephane Lenfant·Sylvie Godey·Jean Roncali·Dominique Vuillaume
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Abstract

A crown-ether dithiol quaterthiophene is synthesized for its covalent immobilization by double fixation on gold surface. While the corresponding dithioester precursor exhibits Pb2+ complexation properties in solution as evidenced by UV-vis spectroscopy and cyclic voltammetry, this Pb2+ affinity is still maintained for monolayers of the dithiol on gold. In addition, current-voltage measurements by Eutectic GaIn drop contact on the monolayer show a significant increase (up to 1.6 x 1E3) of the current at low bias after Pb2+ complexation.

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Truong Khoa Tran, Kacem Smaali, Marie Hardouin, Quentin Bricaud, Maitena Ocafrain, Philippe Blanchard, Stephane Lenfant, Sylvie Godey, Jean Roncali, Dominique Vuillaume. 2012-10-05. A Crown-Ether Loop-Derivatized Oligothiophene Doubly Attached on Gold Surface as Cation-Binding Switchable Molecular Junction. https://doi.org/10.1002/adma.201201668

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