• Fluorescence quenching of coumarin 314 by Ce(III) ions

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/104/02/0325-0329

    • Keywords

       

      Coumarin; quenching; fluorescence

    • Abstract

       

      The fluorescence of coumarin 314 in water and ethanol is quenched statically via ground state complexation with cerium (III) ions. The temperature dependence of the quenching rate constant, (Ksv), determined from linear Stern-Volmer plots, indicate that the complexation is an enthalpy-dominating process. TheKsv determined in ethanol is larger than that in water indicating the important competitive role played by the H-bonding interaction. The activation energy is also evaluated. The experimental findings verify the ability of coumarin 314 to form ground and excited state complexes.

    • Author Affiliations

       

      L F M Ismail1

      1. Department of Chemistry, Faculty of Science, Al-Azhar University (Girls), Cairo, Egypt
    • Dates

       
  • Journal of Chemical Sciences | News

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