3 years ago

Conductance Photoswitching of Metal‐Organic Frameworks with Embedded Spiropyran

Shubham Garg, Heidi Schwartz, Mariana Kozlowska, Anemar Bruno Kanj, Kai Müller, Wolfgang Wenzel, Uwe Ruschewitz, Lars Heinke


Conductive metal‐organic frameworks (MOFs) as well as smart, stimuli‐responsive MOF materials attract considerable attention with respect to advanced applications in energy harvesting and storing as well as in signal processing. Here, the conductance of MOF films of type UiO‐67 with embedded photoswitchable nitro‐substituted spiropyran is investigated. Under UV‐irradiation, spiropyran (SP) reversibly isomerizes to the merocyanine (MC) form, a zwitterionic molecule with an extended size and extended conjugated π‐system. We show the light‐induced SP‐MC isomerization results in remote control over the conductance of the SP@UiO‐67 MOF film and the conductance can be increased by one order of magnitude. This research has the potential to lead to the development of a new generation of photoelectronic devices based on smart hybrid materials.

Publisher URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201811458

DOI: 10.1002/anie.201811458

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