Inorganic Chemistry
Inorganic Chemistry
5 years ago

Solution-Like Behavior of Photoswitchable Spiropyrans Embedded in Metal–Organic Frameworks

Solution-Like Behavior of Photoswitchable Spiropyrans Embedded in Metal–Organic Frameworks
Selina Olthof, Heidi A. Schwartz, Uwe Ruschewitz, Klaus Meerholz, Dominik Schaniel
Photoactive spiropyran was successfully embedded in MOF-5, MIL-68(Ga), and MIL-68(In). The photoisomerization to its merocyanine form was followed by UV/vis and IR spectroscopy. Remarkably, the embedded guests show switching and absorption properties similar to those in the dissolved state, so that MOFs might be considered as “solid solvents” for these molecules. In contrast to that, embedment of SP-1 in the smaller pores of MIL-53(Al) was not successful. SP-1 is mainly adsorbed on the surfaces of the MIL-53(Al) particles. Nonetheless, this combination also shows photochromic behavior.

Publisher URL: http://dx.doi.org/10.1021/acs.inorgchem.7b01908

DOI: 10.1021/acs.inorgchem.7b01908

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