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Novel Photoactive Spirooxazine Based Switch@MOF Composite Materials

Abstract : Molecules, which reversibly transform between two structural configurations upon excitation with electromagnetic radiation, are attractive candidates for the design of smart materials e. g. memory devices. A possible approach for the development of such smart materials is the construction of hybrid systems that contain these photochromic molecules as well as a porous host matrix, which enables their switching process in the solid state. We herein present the first light-responsive materials consisting of the photoswitchable spirooxazine 1,3,3-trimethyl indolino-naphthospirooxazine (SP-O) and crystalline porous MOF (met-al-organic framework) hosts, namely MOF-5, MIL-68(In), MIL-68 (Ga), and MIL-53(Al), which were combined to form hybrid SP-O@MOF composites. These systems show a reversible photochromic response and host-dependent absorption maxima of the incorporated guest molecules. Most remarkably, SP-O is extremely photostable upon repetitive and prolonged UV light exposure especially inside MOF-5, making these composite materials attractive candidates for potential applications in data storage devices.
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https://hal.univ-lorraine.fr/hal-02947411
Contributor : Dominik Schaniel <>
Submitted on : Thursday, September 24, 2020 - 8:29:09 AM
Last modification on : Friday, September 25, 2020 - 3:28:07 AM

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Heidi Schwartz, Melanie Werker, Christian Tobeck, Ronja Christoffels, Dominik Schaniel, et al.. Novel Photoactive Spirooxazine Based Switch@MOF Composite Materials. ChemPhotoChem, Wiley, 2020, ⟨10.1002/cptc.201900193⟩. ⟨hal-02947411⟩

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