Unraveling the timescale of the structural photo-response within oriented Metal-Organic Framework films

Sumea Klokic

Publikation: KonferenzbeitragPosterBegutachtung


Fundamental knowledge on the intrinsic timescale of structural transformations in photo-switchable Metal-Organic Framework films, is crucial to tune their switching performance and to facilitate their applicability as stimuli-responsive materials. In this work, for the first time, an integrated approach to study and quantify the temporal evolution of structural transformations is demonstrated on an epitaxially oriented DMOF-1-on-MOF film system comprising azobenzene in the DMOF-1 pores (DMOF-1/AB). We employed time-resolved Grazing Incidence Wide-Angle X-Ray Scattering measurements (GIWAXS) to track the structural response of the DMOF-1/AB film upon altering the length of the azobenzene molecule by photo-isomerization (trans-to-cis, 343 nm; cis-to-trans, 450 nm). Within seconds, the DMOF-1/AB response occurred fully reversible and over several switching cycles by cooperative photo-switching of the entire oriented film, as confirmed further by infrared measurements. Our work thereby suggests a new avenue to elucidate the timescales and photo-switching characteristics in structur-ally responsive MOF film systems.
PublikationsstatusVeröffentlicht - 22 Apr. 2022
VeranstaltungAdvanced Materials Day 2022 - TU Graz, Graz, Österreich
Dauer: 22 Apr. 2022 → …


SeminarAdvanced Materials Day 2022
Zeitraum22/04/22 → …


  • Metal-organic framework
  • Azobenzene
  • Photo-switch
  • Structural Transformation

Fields of Expertise

  • Advanced Materials Science

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