Nucleic Acid Interaction and Photoluminescent Properties of Acylhydrazone and Its Mn(II), Co(II), Cu(II), Zn(II) and Cd(II) Complexes


A (Z)-N'-benzylidene-2-hydroxy benzohydrazide (L) was prepared from salicylic acid hydrazide and benzaldehyde. The synthesized compound is structurally characterized by single crystal X-ray diffraction, elemental analysis, molar conductivity and spectroscopy (NMR, UV–Vis and FT-IR) techniques. The results of analytical methods indicate that the ligand is an acylhydrazone; possessing active groups easily take part in complexation with metal ions. Five metal complexes with formula MnL2 (1), CoL2 (2), CuL2 (3), ZnL2 (4) and CdL2 (5) were synthesized and characterized by various analytical (UV–Vis, FT-IR, Elemental (CHN) analysis and ESR) techniques. The interaction of ligand L and its complexes 1–5 with calf thymus DNA was carried out by electronic absorption spectroscopy. The results revealed that ligand L and its complexes 1–5 showed hypochromism. Photoluminescence properties of synthesized molecules were recorded and fluorescence intensity of molecules changes with excited wavelength.

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We sincerely thank Prof. T. N. Guru Row, SSCU, Indian Institute of Science, Bangalore for supporting Single X-RD studies. We are also grateful to Prof. Samudranil Pal, department of chemistry, Hyderabad central university, Hyderabad for his support of magnetic susceptibility study of compounds.


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Sennappan, M., Murali Krishna, P., Managutti, P.B. et al. Nucleic Acid Interaction and Photoluminescent Properties of Acylhydrazone and Its Mn(II), Co(II), Cu(II), Zn(II) and Cd(II) Complexes. Chemistry Africa (2021).

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  • Spectroscopy
  • Acylhydrazone
  • Complexation
  • Hypochromism
  • Photoluminescence