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Proton-conduction photomodulation in spiropyran-functionalized MOFs with large on–off ratio

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Abstract

Proton conduction in nanopores is important for applications in fuel cells, chemical sensors and information processing devices inspired by nature. Here, we present a nanoporous material, a metal–organic framework (MOF) thin film, allowing photomodulation of the aqueous and alcoholic proton conduction of the guests by almost two orders of magnitude. The MOF film possesses spiropyran groups which undergo reversible UV-light induced isomerization to the merocyanine form, a highly polar, zwitterionic molecule, where the strong binding of the guests to the merocyanine isomer efficiently suppresses the proton conduction. Such materials with photomodulated ionic conduction contribute to the development of advanced, remote-controllable chemical sensors and to switchable devices interfacing with biological systems.

Graphical abstract: Proton-conduction photomodulation in spiropyran-functionalized MOFs with large on–off ratio

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Supplementary files

Article information


Submitted
30 Sep 2019
Accepted
17 Dec 2019
First published
18 Dec 2019

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2020, Advance Article
Article type
Edge Article

Proton-conduction photomodulation in spiropyran-functionalized MOFs with large on–off ratio

A. B. Kanj, A. Chandresh, A. Gerwien, S. Grosjean, S. Bräse, Y. Wang, H. Dube and L. Heinke, Chem. Sci., 2020, Advance Article , DOI: 10.1039/C9SC04926F

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