A highly selective fluorescent chemosensor for Pb2+

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

Research output: Contribution to journalArticlepeer-review

652 Scopus citations


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 Zn 2+. The signal transduction occurs via of reversible CHEF (chelation-enhanced fluorescence) with this inherent quenching metal ion.

Original languageEnglish
Pages (from-to)10107-10111
Number of pages5
JournalJournal of the American Chemical Society
Issue number28
StatePublished - 20 Jul 2005


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