Journal
ORGANIC LETTERS
Volume 13, Issue 19, Pages 5274-5277Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol202054v
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Funding
- NNSFC [20972111, 21074093, 21004044]
- SRF for ROCS
- NSFT [08JCYBJC-26700]
- State Key Lab. Elemental-Organic Chemistry at Nankai University [1011]
- [NCET-09-0894]
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A photoinduced electron transfer (PET)-based chemosensor possessing dual PET processes by simultaneously introducing both nitrogen and sulfur donors was achieved. The fluorescence signal of the free chemosensor is in a normal-off state due to the sulfur donor being insensitive to environmental pH stimuli. As a result, the device can be used over a wide pH span of 3-11. Upon binding Al3+, a significant fluorescence enhancement with a turn-on ratio over 110-fold was triggered by the inhibition of PET processes from both the sulfur and the nitrogen donors to the fluorophore.
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