A Crown-Ether Loop-Derivatized Oligothiophene Doubly Attached on Gold Surface as Cation-Binding Switchable Molecular Junction
Tran, Truong Khoa · Smaali, Kacem · Hardouin, Marie · Bricaud, Quentin · Ocafrain, Maitena · Blanchard, Philippe · Lenfant, Stephane · Godey, Sylvie · Roncali, Jean · Vuillaume, Dominique
الأصل · EN
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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