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Electro- and photochemical switching of dithienylethene self-assembled monolayers on gold electrodes

Browne, W. R., Kudernac, T., Katsonis, N., Areephong, J., Hielm, J., Feringa, B. L. & Hjelm, J., 31-Jan-2008, In : Journal of Physical Chemistry C. 112, 4, p. 1183-1190 8 p.

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DOI

The photochemical and electrochemical properties of self-assembled monolayers (SAM) of three structurally distinct hexahydro- and hexafluoro-dithienylcyclopentene-based photochromic switches on gold electrodes are reported. The photochemical and electrochemical switching between the open and closed forms of the dithienylethene SAMs is examined and found to be sensitive to the molecular structure of the switch. For the three dithienylethenes, the electrochemical behavior with respect to electrochemical ring opening/closing is retained in the SAMs. In contrast, a marked dependence on the nature of the anchoring group is observed upon immobilization in terms of the retention of the photochemical properties observed in solution. For the meta-thiophenol anchor both photochemical ring opening and closing are observed in the SAM, while for the thienyl-thiol-anchored switches the photochemically properties are changed markedly compared with those observed in solution. The stability of the monolayers toward desorption following photochemical and electrochemical switching is examined through electrochemistry and X-ray photoelectron spectroscopy.

Original languageEnglish
Pages (from-to)1183-1190
Number of pages8
JournalJournal of Physical Chemistry C
Volume112
Issue number4
Publication statusPublished - 31-Jan-2008

    Keywords

  • MOLECULAR SWITCHES, PHOTOCHROMIC SWITCHES, INFORMATION-STORAGE, SURFACE, DIARYLETHENES, NANOPARTICLES, BEHAVIOR, DITHIENYLCYCLOPENTENES, SPIROPYRANS, EFFICIENCY

ID: 1976462