Kwon Ji Young, Jang Yun Jung, Lee Yoon Ju, Kim Kwan Mook, Seo Mi Sook, Nam Wonwoo, Yoon Juyoung
Department of Chemistry and Division of Nano Sciences, Ewha Womans University, 11-1 Daehyon-Dong, Sodaemun-Ku, Seoul 120-750, Korea.
J Am Chem Soc. 2005 Jul 20;127(28):10107-11. doi: 10.1021/ja051075b.
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.
合成了一种基于罗丹明B的新型Pb²⁺荧光传感器。在乙腈中，这种新型荧光传感器对Pb²⁺表现出相对于其他所检测金属离子的极高选择性。加入Pb²⁺后，观察到整体发射变化达100倍，其选择性经计算是Zn²⁺的200倍。信号转导通过与这种具有固有猝灭作用的金属离子的可逆螯合增强荧光（CHEF）发生。
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