A highly selective fluorescent chemosensor for Pb2+.
نویسندگان
چکیده
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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ورودعنوان ژورنال:
- Journal of the American Chemical Society
دوره 127 28 شماره
صفحات -
تاریخ انتشار 2005