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Solvatochromic responses and pH effects on the electronic spectra of some azo derivatives of 1-amino-2-hydroxy-4-naphthalenesulfonic acid
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  • 作者:Mamdouh S. Masoud ; Ahmed M. Ramadan…
  • 关键词:Naphthalenesulfonic acid ; Diazotization ; Solvatochromism ; pH effect
  • 刊名:Journal of the Iranian Chemical Society
  • 出版年:2016
  • 出版时间:May 2016
  • 年:2016
  • 卷:13
  • 期:5
  • 页码:931-943
  • 全文大小:1,217 KB
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  • 作者单位:Mamdouh S. Masoud (1)
    Ahmed M. Ramadan (1) (2)
    Amina A. Soayed (1) (3)
    Sherif M. S. Ammar (1)

    1. Faculty of Science, Chemistry Department, Alexandria University, Alexandria, Egypt
    2. Faculty of Science, Chemistry Department, King Khalid University, Abha, Saudi Arabia
    3. Faculty of Medicine, Chemistry Department, Dammam University, Dammam, Saudi Arabia
  • 刊物主题:Analytical Chemistry; Inorganic Chemistry; Physical Chemistry; Biochemistry, general; Organic Chemistry;
  • 出版者:Springer Berlin Heidelberg
  • ISSN:1735-2428
文摘
Synthesis and characterization of five arylazo derivatives of 1-amino-2-hydroxy-4-naphthalenesulfonic acid (H2L1) are reported. The UV/Vis absorption spectra of the parent compound (H2L1) and its arylazo derivatives (H2L2–H4L6) have been measured at room temperature in seven solvents of different polarities and with variable parameters. The electronic transitions were analyzed using SPSS program, linear regression technique and Kamlet–Taft’s equation to permit a good understanding of solvent-induced spectral shifts. The electronic absorption spectra of the prepared compounds containing different substituents were studied in aqueous solutions at different pH values. The pK values of the investigated compounds were evaluated spectrophotometrically. The prevailing acid species present at any pH range are judged from the constructed distribution diagrams.

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