Highly selective ratiometric fluorescent sensing for Hg(2+) and Au(3+), respectively, in aqueous media

Ming Dong, Ya-Wen Wang, Yu Peng
Organic Letters 2010 November 19, 12 (22): 5310-3
A nonsulfur probe based on a 1,8-naphthalimide and alkyne conjugate for the ratiometric fluorescent sensing for Hg(2+) and Au(3+) through the tuning of pH in different aqueous solutions is described. This work provides a novel reaction-based approach for selective recognition of these two ions with significant change of fluorescence color and constitutes the first ratiometric case for Au(3+).

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