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Conductance Photoswitching of Metal–Organic Frameworks with Embedded Spiropyran
Author(s) -
Garg Shubham,
Schwartz Heidi,
Kozlowska Mariana,
Kanj Anemar Bruno,
Müller Kai,
Wenzel Wolfgang,
Ruschewitz Uwe,
Heinke Lars
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201811458
Subject(s) - spiropyran , merocyanine , isomerization , conductance , materials science , photochemistry , molecule , metal organic framework , nanotechnology , conjugated system , organic molecules , optoelectronics , photochromism , chemistry , polymer , organic chemistry , catalysis , physics , adsorption , condensed matter physics , composite material
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.