Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 20, Pages 7732-7737Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202002389
Keywords
hybrid membranes; MOFs; photoswitching; proton conduction; sulfonated spiropyran
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Funding
- Welch Foundation [AX-1730]
- Major R&D plan of Zhejiang Natural Science Foundation [LD18E020001]
- National Natural Science Foundations of China
- [NSFC NSFC 51632008]
- [21875212]
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Mimicking biological proton pumps to achieve stimuli-responsive protonic solids has long been of great interest for their diverse applications in fuel cells, chemical sensors, and bio-electronic devices. Now, dynamic light-responsive metal-organic framework hybrid membranes can be obtained by in situ encapsulation of photoactive molecules (sulfonated spiropyran, SSP), as the molecular valve, into the cavities of the host ZIF-8. The configuration of SSP can be changed and switched reversibly in response to light, generating different mobile acidic protons and thus high on/off photoswitchable proton conductivity in the hybrid membranes and device. This device exhibits a high proton conductivity, fast response time, and extremely large on/off ratio upon visible-light irradiation. This approach might provide a platform for creating emerging smart protonic solids with potential applications in the remote-controllable chemical sensors or proton-conducting field-effect transistors.
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