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  • Title: Photoswitching behavior of azobenzene-containing alkanethiol self-assembled monolayers on Au surfaces.
    Author: Jung U, Filinova O, Kuhn S, Zargarani D, Bornholdt C, Herges R, Magnussen O.
    Journal: Langmuir; 2010 Sep 07; 26(17):13913-23. PubMed ID: 20806964.
    Abstract:
    The photoisomerization of self-assembled monolayers of azobenzene-containing alkanethiols, as well as of mixed monolayers of these substances with n-alkanethiol spacer molecules on Au surfaces, was studied by photoelectrochemical measurements and surface plasmon resonance spectroscopy. A strong dependence on the molecular structure of the adsorbates was found, specifically on the linker between the azobenzene moiety and the alkanethiol: while molecules with an amide group were photoinactive, those with an ether group exhibited pronounced, reversible photoisomerization in pure and mixed adlayers. Both trans-cis and cis-trans isomerization followed first-order kinetics with time constants that suggest high quantum efficiencies for these processes.
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