A highly selective fluorescent chemosensor for Pb2+.
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.
Kwon
Ji Young
JY
Department of Chemistry and Division of Nano Sciences, Ewha Womans University, 11-1 Daehyon-Dong, Sodaemun-Ku, Seoul 120-750, Korea.
Jang
Yun Jung
YJ
Lee
Yoon Ju
YJ
Kim
Kwan Mook
KM
Seo
Mi Sook
MS
Nam
Wonwoo
W
Yoon
Juyoung
J