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. 2005 Jul 20;127(28):10107-11.
doi: 10.1021/ja051075b.

A highly selective fluorescent chemosensor for Pb2+

Ji Young Kwon  1 , Yun Jung Jang, Yoon Ju Lee, Kwan Mook Kim, Mi Sook Seo, Wonwoo Nam, Juyoung Yoon
Affiliations

A highly selective fluorescent chemosensor for Pb2+

Ji Young Kwon et al. J Am Chem Soc. .

Abstract

A new fluorescent sensor based on rhodamine B for Pb2+ was synthesized. The new fluorescent sensor showed an extreme selectivity for Pb2+ over other metal ions examined in acetonitrile. Upon the addition of Pb2+, an overall emission change of 100-fold was observed, and the selectivity was calculated to be 200 times that of Zn2+. The signal transduction occurs via of reversible CHEF (chelation-enhanced fluorescence) with this inherent quenching metal ion.

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