Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 25, Issue 68, Pages 15441-15454Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201903252
Keywords
charge transfer; circularly polarized luminescence switching; conformations; electronic structures; excimer formation
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Funding
- National Natural Science Foundation of China [21572120, 21971150, 24173214]
- strategic Priority Research Program of the Chinese Academy
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The circularly polarized luminescence (CPL) switching is of significant interest for applications in security technologies and sensing devices. Small organic molecules (SOMs) show several advantages over metal complexes, supramolecular assemblies, and polymers. Therefore, the recent progress on the CPL switching in SOMs is here reviewed. The results are summarized based on the strategies used to tune factors that influence the emission properties, and thus, to realize CPL switching. The strategies that have been adopted include promoting the excimer formation of fluorescent units, changing the conformation of fluorophores, tuning the electronic structure of the pi-skeleton/substituent, and modulating the intramolecular charge-transfer dynamics.
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