Conductance Photoswitching of Metal–Organic Frameworks with Embedded Spiropyran |
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Authors: | Shubham Garg,Heidi Schwartz,Mariana Kozlowska,Anemar Bruno Kanj,Kai Mü ller,Wolfgang Wenzel,Uwe Ruschewitz,Lars Heinke |
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Abstract: | Conductive metal–organic frameworks (MOFs) as well as smart, stimuli‐responsive MOF materials have attracted considerable attention with respect to advanced applications in energy harvesting and storage as well as in signal processing. Here, the conductance of MOF films of type UiO‐67 with embedded photoswitchable nitro‐substituted spiropyrans was investigated. Under UV irradiation, the spiropyran (SP) reversibly isomerizes to the open merocyanine (MC) form, a zwitterionic molecule with an extended conjugated π‐system. The light‐induced SP–MC isomerization allows for 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 contribute to the development of a new generation of photoelectronic devices based on smart hybrid materials. |
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Keywords: | conductivity merocyanine metal– organic frameworks photoswitching spiropyrans |
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