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

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

arxiv: 1210.1829 · v1 · pith:QAI6MDRXnew · submitted 2012-10-05 · ❄️ cond-mat.mes-hall

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

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Jean Roncali Dominique Vuillaume

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classification ❄️ cond-mat.mes-hall

keywords goldcomplexationcrown-etherdithiolsurfaceadditionaffinityattached

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

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