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  • Title: Detection of zinc ions by differential circularly polarized fluorescence excitation.
    Author: Dai Z, Proni G, Mancheno D, Karimi S, Berova N, Canary JW.
    Journal: J Am Chem Soc; 2004 Sep 29; 126(38):11760-1. PubMed ID: 15382888.
    Abstract:
    A new chiroptical spectroscopic approach, differential circularly polarized fluorescence excitation (CPE), can be used to provide a selective method for detecting the presence of zinc ions. The approach utilizes the same instrumentation as fluorescence-detected circular dichroism and provides strong contrast in metal detection due to response to both chelation-enhanced fluorescence and circular dichroism upon metal ion binding. The observed contrast is therefore better than either of the parent spectroscopic detection methods. CPE also provides a strategy to reduce interference from background such as protein-based tryptophan fluorescence.
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