Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 28, Pages 8448-8452Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201802020
Keywords
crystal structures; elastic bending; fluorophores; optical waveguides; organic crystals
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Funding
- National Natural Science Foundation of China [51622304, 51773077, 51603082, 51773079]
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The study of elastic organic single crystals (EOSCs) has emerged as a cutting-edge research of crystal engineering. Although a few EOSCs have been reported recently, those suitable for optical/optoelectronic applications have not been realized. Here, we report an elastic crystal of a Schiff base, (E)-1-(4-(dimethylamino)phenyl)iminomethyl-2-hydroxyl-naphthalene. The crystal is highly bendable under external stress and able to regain immediately its original straight shape when the stress is released. It displays bright orange-red emission with a high fluorescence quantum yield of 0.43. Intriguingly, it can serve as a low-loss optical waveguide even at the highly bent state. Our result highlights the feature and utility of elasticity of organic crystals.
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