Journal
NEW JOURNAL OF CHEMISTRY
Volume 35, Issue 4, Pages 849-853Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0nj00958j
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Funding
- State Key Program for Basic Researches of China [2009CB929504, 2007CB936300]
- Science Foundation of Jiangsu Province [BK2006717]
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A highly selective ratiometric fluorescent Ag+ chemosensor RAAP which featured Ag+-induced enhancement of fluorescence emission and blue-shift of the UV-vis spectrum (64 nm) was developed. Both of the changes are due to the Ag+-induced conformational changes from a pyrene monomer to a pyrene excimer and the formation of a crossing configuration. The fluorescence detection limit of Ag+ can reach 1.0 x 10(-7) M, which complies with the standards of US EPA and World Health Organization (WHO) for drinking water (5.0 x 10(-7) M). RAAP is organic solvent-stable and pH-stable and its spectral response toward Ag+ is found to be reversible.
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