Journal
ORGANIC LETTERS
Volume 20, Issue 9, Pages 2620-2623Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.8b00820
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Funding
- National Nature Science Foundation of China [21672006, 21672007, 21402001, 21472002]
- Anhui Province [1508085J07]
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Annularly fused azaBODIPY-based organic fluoro-phores (HBPs 2) containing up to 13 aromatic ring fusions were synthesized by a Suzuki coupling reaction with bromoazadipyrro-methenes and a subsequent regioselective oxidative ring-fusion reaction. X-ray analysis indicates almost planar dipyrrin cores for all crystals but overall curved or wave conformations for those HBP dyes. These molecules exhibit unique structural and physical properties including excellent spectral selectivity (negligible absorption between 300 and 700 nm), sharp near-infrared (NIR) absorption (up to 878 nm) and emission (up to 907 nm), large extinction coefficient (up to 4.5 X 10(5) M-1 cm(-1)), and excellent photostabilities.
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