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

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

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 dithi...

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Veröffentlicht in:Advanced materials (Weinheim) 2013-01, Vol.25 (3), p.427-431
Hauptverfasser: Tran, Truong Khoa, Smaali, Kacem, Hardouin, Marie, Bricaud, Quentin, Oçafrain, Maïténa, Blanchard, Philippe, Lenfant, Stéphane, Godey, Sylvie, Roncali, Jean, Vuillaume, Dominique
Format: Artikel
Sprache:eng
Schlagworte:
Complexation
Contact
Covalence
cyclic voltammetry
Engineering Sciences
Gain
Gold
Impact tests
molecular electronics
Monolayers
Precursors
thiophene
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Zusammenfassung: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.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201201668