Spectrofluorimetric determination of the antineoplastic agent lomustine based on the sensitizing effect of β-cyclodextrin
| Autor: | Hassina Fisli, Nadjia Bensouilah, Mohamed Abdaoui |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Chromatography Cyclodextrin 010405 organic chemistry Biophysics Solvation Beta-Cyclodextrins Lomustine 010402 general chemistry 01 natural sciences 0104 chemical sciences Solvent chemistry.chemical_compound chemistry Chemistry (miscellaneous) medicine Solvent effects Acetonitrile medicine.drug |
| Zdroj: | Luminescence. 31:871-880 |
| ISSN: | 1522-7235 |
| DOI: | 10.1002/bio.3045 |
| Popis: | The effects of solvent dipolarity/polarizability and solvent-solute hydrogen bonding on the photophysical properties of the antineoplastic drug lomustine were analysed by means of the linear solvation energy relationship (LSER) concept proposed by Kamlet and Taft. The LSER method enabled the overall solvent effects to be quantitatively estimated and separated into specific and non-specific contributions. The molecular encapsulation of lomustine by β-cyclodextrin (β-CD) has been studied using fluorescence spectroscopy. The results are discussed in terms of the binding parameter and the effect of the solvent used. It was concluded that β-CD forms a 1:1 inclusional complex with lomustine in acetonitrile solution and its association constant was calculated to be 500 M(-1). In addition, and for the first time, a simple, rapid and high sensitive fluorimetric method for the determination of lomustine was developed based upon the enhancement effect produced through complex formation with β-CD. The new approach for the quantification of lomustine in the presence of β-CD was described in aqueous and organic solutions. Better limits of detection (0.31 µg ml(-1)) and quantification (1.05 µg ml(-1)) were obtained in aqueous solution with respect to those obtained in organic solvent. |
| Databáze: | OpenAIRE |
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