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)

  • 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.

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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.

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. Retrieved from https://ejournal.upsi.edu.my/index.php/JSML/article/view/390

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