Synthesis, Structural Characterization and DPPH Radical Scavenging Activity of Cu(II), Ni(II), Zn(II) and Cd(II) Complexes of 2,6-diacetylpyridine bis(benzenesulfonohydrazide)

Authors

  • Yusnita Juahir
  • Hapipah Mohd Ali
  • Daniel Zin Hua Wong
  • Mustaffa Ahmad
  • Azlan Kamari
  • Mai Shihah Abdullah

Keywords:

complexes, 2,6-Diacetylpyridine bis(benzenesulfonohydrazide), antioxidant, DPPH radical scavenging activity

Abstract

Cu(II), Ni(II), Zn(II) and Cd(II) complexes were synthesized from 2,6-Diacetylpyridine bis(benzenesulfonohydrazide) ligands; DAP(BSH)2, DAP(CH3BSH)2 and DAP(OCH3BSH)2. All complexes were characterized using IR and UV-Vis spectroscopic techniques. The IR spectra revealed the disappearance of ν(N-H) absorption band, which suggests that the proton on the imine nitrogen atom of the ligand was deprotonated upon complexation. The involvement of sulfonyl oxygen atoms in the coordination was evident by the absence of νas(SO2) absorption bands. This was further confirmed by the appearance of SO2 bending vibration band, which suggests the distortion of SO2 from its structure. The antioxidant activity of the complexes was determined by their DPPH radical scavenging activity. The result showed that the DPPH radical scavenging activity of the parent ligands was reduced when they were chelated with Cu(II), Ni(II), Zn(II) and Cd(II) ions. Of the complexes studied, Zn(II) complexes of DAP(BSH)2 and DAP(OCH3BSH)2 exhibited better antioxidant activity.

Author Biographies

  • Yusnita Juahir

    Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris,35900
    Tanjong Malim, Perak, Malaysia

  • Hapipah Mohd Ali

    Department of Chemistry, Faculty of Science, University of Malaya,50603 Kuala Lumpur, Malaysia

  • Daniel Zin Hua Wong

    Institute of Biological Sciences, Faculty of Science, University of Malaya,50603 Kuala Lumpur, Malaysia.

  • Mustaffa Ahmad

    Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak, Malaysia.

  • Azlan Kamari

    Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris,35900 Tanjong Malim, Perak, Malaysia.

  • Mai Shihah Abdullah

    Department of Biology, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris,35900 Tanjong Malim, Perak, Malaysia.

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Published

2019-01-19

How to Cite

Juahir, Y., Mohd Ali, H., Zin Hua Wong, D., Ahmad, M., Kamari, A., & Abdullah, M. S. (2019). Synthesis, Structural Characterization and DPPH Radical Scavenging Activity of Cu(II), Ni(II), Zn(II) and Cd(II) Complexes of 2,6-diacetylpyridine bis(benzenesulfonohydrazide). Journal of Science and Mathematics Letters, 4(2), 12-21. https://ejournal.upsi.edu.my/index.php/JSML/article/view/390

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