Journal
MATERIALS CHEMISTRY FRONTIERS
Volume 2, Issue 11, Pages 2124-2129Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8qm00396c
Keywords
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Funding
- National Science Foundation of China [51573140, 21734007]
- Fundamental Research Funds for the Central Universities [2042017kf0247]
- Hubei Province [2017CFA002]
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Efficient pure organic room temperature phosphorescence (RTP) materials have drawn considerable attention. So far, most pure organic RTP molecules are aromatic compounds, and nonconjugated molecules are really scarce. The only few reported non-aromatic organic phosphorescence materials are polymers without confirmed subtle structures, and there are no reports concerning non-aromatic organic small molecules with persistent RTP. Here, we report an example of a pure non-aromatic organic small molecule, cyanoacetic acid, that shows unexpected persistent RTP behavior with RTP lifetime as long as 862 ms. According to the CAA crystal and theoretical calculations, the presence of strong intermolecular hydrogen bonds is the key factor for its persistent RTP effect. This discovery demonstrates a clear relationship between the molecular structure, packing mode and RTP effect in the non-aromatic system, which will largely extend the current pure organic RTP systems to deeply investigate the origin of light emission.
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