Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 12, Pages 6367-6371Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202014720
Keywords
organic crystals; photoconduction; photoinduced luminescence switching; radicals; rapid response
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Funding
- NSFC [51973239, 51733010, 51603232, 51873237, 51903254, 52073315]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2017B030306012]
- Tip-top Scientific and Technical Innovative Youth Talents of Guangdong Special Support Program [2017TQ04C782]
- Science and Technology Program of Guangzhou [201804010173]
- Fundamental Research Funds for the Central Universities
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Photoinduced organic radicals play a crucial role in various chemical and physical processes, however, the luminescent properties of these radicals are rarely reported. A unique luminescent radical has been discovered in a simple organic crystal, generated through gentle light irradiation, showcasing rapid and reversible generation due to the twist and asymmetric conformation of the isolated molecules with weak intermolecular interactions. Additionally, a dual-channel photosensitive device with rapid response and repeatability can be fabricated based on thin film of this organic crystal, enabling photoswitching on luminescence and conducting properties.
Photoinduced organic radicals are important for chemical and physical processes of organic materials, which are extensively investigated and applied in organic synthesis, photoelectronic devices and biotechnology. However, there are rare reports of the luminescence for these photoinduced radicals, especially in the condensed state. Herein, an unexpected and interesting luminescent radical is described, which can be rapidly and reversibly generated from a simple organic crystal by gentle light irradiation in air. It was revealed that the twist and asymmetric conformation of isolated molecule in its crystal with only weak C-H...pi intermolecular interactions, which led to the generation of such photoinduced luminescent radicals. In addition, dual-channel photosensitive device with rapid response and well repeatability can be obtained based on the thin film of this organic crystal, showing both photoswitching on luminescence and conducting.
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