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  • Chem Sci Trans., 2014, 3(3),  pp 1221-1227  

    DOI:10.7598/cst2014.853

    Research Article

    Absorption Spectral Studies on Naphthyl Pyridyl Pyrazole (NPP) in Mixed Solvent Systems

  • KHALED MUFTAH ELSHERIF*, ASHRAF EL-HASHANI, ABDELMENEIM EL-DALI, OTMAN DAKHIL, ADEL NAJAR and MOHAMED ALGERIANI
  • Benghazi University, Faculty of Science, Chemistry Department, Benghazi-Libya
  • Abstract

    The synthesis and absorption spectroscopy of the bichromophore 1-[(2-naphthyl) methyl]-3-(2-pyridyl)-1H-pyrazole (NPP) are reported. The absorption spectra of NPP have been studied in mixed solvents, in which the spectra shows two main peaks due to π→ π* transition. The positions and intensities of the absorption band of NPP are sensitive to the solvent polarity. The spectral shifts are attributed to solvent-solute interactions in terms of hydrogen bonding effects. However, it is frequently found, that the dielectric properties of polar mixtures observe influence on wavelength of maximal absorption and the absorption intensity.

    Keywords

    Solvent effect, Absorption spectra, Naphthyl pyridyl pyrazole

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