Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 24, Issue 68, Pages 17897-17901Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201803428
Keywords
chromophores; difluoroboron dyes; fluorophores; nitrogen heterocycles; N ligands; Stokes shift
Categories
Funding
- National Natural Science Foundations of China [21606116, 21762020, 51873160]
- Natural Science Foundations of Jiangxi Province [20161BAB213070, 20132BAB213008]
- Department of Education of Jiangxi Province [GJJ170176, GJJ150323]
Ask authors/readers for more resources
Boron difluoroquinazolinone-pyridine (BODIQPy) and substituted derivatives have been designed and synthesized. Strong emission with high fluorescence quantum yield both in solution (up to 0.99) and in solid state (up to 0.60) was achieved in these asymmetric BODIQPys. For 6-halogen substituted BODIQPys, the heavy atomic effect of bromine and iodine was suppressed in solution due to the strong electron-withdrawing ability of the BODIQPy core. As a result, 6-iodine substituted BODIQPy shows the unusual fluorescence quantum yields (>0.70) in dichloromethane and tetrahydrofuran. In the solid state, the asymmetric structure induced a unique dimeric structure, and efficient luminescence was also observed. The formation of halogen bonds between carbonyl oxygen and bromine or iodine regulated the stacking mode and enhanced intermolecular interaction, resulting in a decline in the fluorescence quantum yield. In addition, a large Stokes shift was also achieved in these asymmetric BODIQPys.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available