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Inelastic electron tunneling spectroscopy of difurylethene-based photochromic single-molecule junctions
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Inelastic electron tunneling spectroscopy of difurylethene-based photochromic single-molecule junctions
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Journal Article
Inelastic electron tunneling spectroscopy of difurylethene-based photochromic single-molecule junctions
2017
Overview
Diarylethene-derived molecules alter their electronic structure upon transformation between the open and closed forms of the diarylethene core, when exposed to ultraviolet (UV) or visible light. This transformation results in a significant variation of electrical conductance and vibrational properties of corresponding molecular junctions. We report here a combined experimental and theoretical analysis of charge transport through diarylethene-derived single-molecule devices, which are created using the mechanically controlled break-junction technique. Inelastic electron tunneling (IET) spectroscopy measurements performed at 4.2 K are compared with first-principles calculations in the two distinct forms of diarylethenes connected to gold electrodes. The combined approach clearly demonstrates that the IET spectra of single-molecule junctions show specific vibrational features that can be used to identify different isomeric molecular states by transport experiments.
Publisher
Beilstein-Institut zur Föerderung der Chemischen Wissenschaften,Beilstein Institute,Beilstein-Institut
