Highly Selective and Sensitive Fluorescent Turn-on Chemosensor for Al3+ Based on a Novel Photoinduced Electron Transfer Approach

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 st...

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Published inOrganic letters Vol. 13; no. 19; pp. 5274 - 5277
Main Authors Lu, Yan, Huang, Shanshan, Liu, Yiyang, He, Song, Zhao, Liancheng, Zeng, Xianshun
Format Journal Article
LanguageEnglish
Published WASHINGTON American Chemical Society 07.10.2011
Amer Chemical Soc
Subjects
Aluminum - chemistry
Cations - chemistry
Chemistry
Chemistry, Organic
Electrons
Fluorescent Dyes - chemistry
Hydrogen-Ion Concentration
Molecular Structure
Photochemical Processes
Physical Sciences
Science & Technology
ALUMINUM TOXICITY
SENSOR
IONS
ACID
LEAD
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Summary: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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ISSN:1523-7060
1523-7052
1523-7052
DOI:10.1021/ol202054v