---
res:
  bibo_abstract:
  - Azobenzenealkanethiols in self-assembled monolayers (SAMs) on Au(111) exhibit
    reversible trans–cis photoisomerization when diluted with alkanethiol spacers.
    Using these mixed SAMs, we show switching of the linear optical and second-harmonic
    response. The effective switching of these surface optical properties relies on
    a reasonably large cross section and a high photoisomerization yield as well as
    a long lifetime of the metastable cis isomer. We quantified the switching process
    by X-ray absorption spectroscopy. The cross sections for the trans–cis and cis–trans
    photoisomerization with 365 and 455 nm light, respectively, are 1 order of magnitude
    smaller than in solution. In vacuum, the 365 nm photostationary state comprises
    50–74% of the molecules in the cis form, limited by their rapid thermal isomerization
    back to the trans state. In contrast, the 455 nm photostationary state contains
    nearly 100% trans-azobenzene. We determined time constants for the thermal cis–trans
    isomerization of only a few minutes in vacuum and in a dry nitrogen atmosphere
    but of more than 1 day in ambient air. Our results suggest that adventitious water
    adsorbed on the surface of the SAM stabilizes the polar cis configuration of azobenzene
    under ambient conditions. The back reaction rate constants differing by 2 orders
    of magnitude underline the huge influence of the environment and, accordingly,
    its importance when comparing various experiments.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Thomas
      foaf_name: Moldt, Thomas
      foaf_surname: Moldt
  - foaf_Person:
      foaf_givenName: Daniel
      foaf_name: Przyrembel, Daniel
      foaf_surname: Przyrembel
  - foaf_Person:
      foaf_givenName: Michael
      foaf_name: Schulze, Michael
      foaf_surname: Schulze
  - foaf_Person:
      foaf_givenName: Wibke
      foaf_name: Bronsch, Wibke
      foaf_surname: Bronsch
  - foaf_Person:
      foaf_givenName: Larissa
      foaf_name: Boie, Larissa
      foaf_surname: Boie
  - foaf_Person:
      foaf_givenName: Daniel
      foaf_name: Brete, Daniel
      foaf_surname: Brete
  - foaf_Person:
      foaf_givenName: Cornelius
      foaf_name: Gahl, Cornelius
      foaf_surname: Gahl
  - foaf_Person:
      foaf_givenName: Rafal
      foaf_name: Klajn, Rafal
      foaf_surname: Klajn
      foaf_workInfoHomepage: http://www.librecat.org/personId=8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
  - foaf_Person:
      foaf_givenName: Petra
      foaf_name: Tegeder, Petra
      foaf_surname: Tegeder
  - foaf_Person:
      foaf_givenName: Martin
      foaf_name: Weinelt, Martin
      foaf_surname: Weinelt
  bibo_doi: 10.1021/acs.langmuir.6b01690
  bibo_issue: '42'
  bibo_volume: 32
  dct_date: 2016^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/0743-7463
  - http://id.crossref.org/issn/1520-5827
  dct_language: eng
  dct_publisher: American Chemical Society@
  dct_subject:
  - Electrochemistry
  - Spectroscopy
  - Surfaces and Interfaces
  - Condensed Matter Physics
  - General Materials Science
  dct_title: Differing isomerization kinetics of azobenzene-functionalized self-assembled
    monolayers in ambient air and in vacuum@
  fabio_hasPubmedId: '27681851'
...