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Journal of Fluorescence

, 21:1997 | Cite as

Fluorescence Enhancement Effect for the Determination of Adenosine 5′-Monophosphate with 9-Anthracene Carboxylic Acid-Cetyl Trimethyl Ammonium Bromide System

  • Mahadev S. Khot
  • Netaji K. Desai
  • Govind B. Kolekar
  • Shivajirao R. Patil
Original Paper

Abstract

A fluorimetric method based on fluorescence enhancement effect was developed for the determination of adenosine 5′-monophosphate (AMP) with 9-anthracene carboxylic acid (9-ANCA)–cetyl trimethyl ammonium bromide (CTAB) system. Fluorescence intensity of 9-ANCA was decreased by the addition of CTAB but addition of AMP again rose the intensity of 9-ANCA gradually. The observed fluorescence enhancement is attributed to the competitive binding reaction of 9-ANCA and adenosine to CTAB. The enhancement in the fluorescence intensity was found proportional to the concentration of AMP over the range 2.0 × 10−4 to 1.2 × 10−3 mol dm−3. The ion pair complex is formed spontaneously between 9-ANCA and CTAB. Since the binding interaction is larger for the adenosine–CTAB pair, the fluorophore 9-ANCA will be released. The quantum yield of free 9-ANCA is higher therefore its fluorescence observed at 417 nm wavelength is enhanced. This mechanism of competitive molecular interaction is further confirmed by conductometric measurements. The method was applied successfully for the determination of AMP from pharmaceutical sample. The method is more selective, sensitive and relatively free from interferences.

Keywords

Fluorescence enhancement 9-Anthracene carboxylic acid Adenosine 5′- monophosphate Ion-association complex Cetyl trimethyl ammonium bromide 

Notes

Acknowledgement

The authors gratefully acknowledge, Department of Science and Technology (DST) and University Grants Commission (UGC) New Delhi for providing grants to the Department of Chemistry, Shivaji University, Kolhapur under FIST and SAP program, respectively.

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Mahadev S. Khot
    • 1
  • Netaji K. Desai
    • 2
  • Govind B. Kolekar
    • 2
  • Shivajirao R. Patil
    • 2
  1. 1.Ch. Sambhaji Raje Sainik SchoolRatnagiriIndia
  2. 2.Fluorescence Spectroscopy Laboratory, Department of ChemistryShivaji UniversityKolhapurIndia

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