A crown-ether loop-derivatized oligothiophene doubly attached on gold surface as cation-binding switchable molecular junction.
basic_science · Level V
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- Record sourced from PubMed, PMID 22887463.
- Also identified by DOI 10.1002/adma.201201668.
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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 Pb(2+) 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 × 10(3) times) of the current at low bias after Pb(2+) complexation.