Synthesis and characterization of Rhodamine based Pb2+ selective fluorescence sensor
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We have synthesized and characterized a new Rhodamine-based Pb2+ selective fluorescent sensor. The fluorescent Pb2+ sensor Rh2 was synthesized by reaction of Rhodamine B with 2-bromoethylamine followed by sodium azide in high yield. We found that fluorescent sensor Rh2 exhibits a good selectivity toward Pb2+ over other metal ions in chloroform solution. In the absence of Pb2+, fluorescent sensor Rh2 is colorless and non-fluorescent, whereas pink color and strong fluorescence observed upon the addition of Pb2+. Since Rhodamine-based fluorescent sensor Rh2 exhibited simultaneous colormetric and fluorescence changes upon the addition of Pb2+, implying possible applications in a variety of area such as environment monitoring and diagnostic analysis.
KeywordsFluorescent sensor Pb2+ sensor Environment monitoring
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