Fluorescence Spectral Studuy of Interaction of Water-soluble Metal Complexes of Schiff-base and DNA

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  • LIU Guo-Dong
    College of Chemistry and Chemical Engineering, State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University Department of Chemistry, East China Normal University
  • LIAO Jian-Pei
    College of Chemistry and Chemical Engineering, State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University
  • HUANG Sha-Sheng
    College of Chemistry and Chemical Engineering, State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University
  • SHEN Guo-Li
    College of Chemistry and Chemical Engineering, State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University
  • YU Ru-Qin
    College of Chemistry and Chemical Engineering, State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University

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  • Fluorescence Spectral Study of Interaction of Water-soluble Metal Complexes of Schiff-base and DNA.

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The fluorescence spectral characteristics and the interaction of several water-soluble metal complexes of Schiff-base with DNA are described. Among the complexes tested, Mn-Schiff-base bound to DNA showed a marked decrease in the fluorescence intensity with a blue shift of the excitation and emission peaks. Some hypochromism in the UV absorption spectra was also observed. KI quenching and competitive binding to DNA between Mn-Schiff-base and ethidium bromide (EB) were studied in connection with other experimental observations to show that the interactive model between Mn-Schiff-base and DNA is an intercalative one. The pH and salt effect on the fluorescence properties was also investigated. The linear relationship between F/F0 and the concentration of calf thymus DNA covers 3.0 × 10-6 - 2 × 10-4 mol L-1, which can be utilized for determining traces of calf thymus DNA with a detection limit of 8.0 × 10-7 mol L-1 in base pairs.

収録刊行物

  • Analytical Sciences

    Analytical Sciences 17 (9), 1031-1036, 2001

    社団法人 日本分析化学会

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