Issue 5, 2020

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

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

Supplementary files

Article information

Article type
Edge Article
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
Creative Commons BY-NC license

Chem. Sci., 2020,11, 1404-1410

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, 11, 1404 DOI: 10.1039/C9SC04926F

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