Synthesis and spectral characterization of 1,2-bis(5-methyl/chloro-1H-benzimidazol-2-yl)ethanols and their Co(II), Pd(II) and Zn(II) complexes


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Tavman A. , Gurbuz D., Cinarli A.

JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, cilt.83, ss.1099-1112, 2018 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 83
  • Basım Tarihi: 2018
  • Doi Numarası: 10.2298/jsc180123046t
  • Dergi Adı: JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
  • Sayfa Sayısı: ss.1099-1112

Özet

1,2-Bis(5-methyl/chloro-1H-benzimidazol-2-yl)ethanols (1 and 2), asymmetric bis-benzimidazoles, and their complexes with CoCl2, PdCl2 and ZnCl2 were synthesized and characterized by elemental analysis, molar conductivity, magnetic moment, TGA, FT-IR (mid-and far-IR), FT-Raman, H-1-and C-13-NMR spectroscopy, ESI-MS and fluorescence spectroscopy. The spectral data suggest that the chiral chelating ligands acted as tridentate through both the C=N nitrogen and OH oxygen atoms. According to the molar conductance, the Zn(II) complexes are non-electrolyte whereas the Co(II) complexes are 1:2 and the Pd(II) complexes are 1:1 electrolytes. The ligands and most of the complexes show triple fluorescence in ethanol. In addition, the Zn(II) complex of 1 (1c)shows significant fluorescence characteristics compared to the other complexes.