The synthesis and spectroscopic characterization of Ni(II) complexes of 1-substituted phenyl-3,5-diphenylformazans

Tezcan H., Uzluk E.

DYES AND PIGMENTS, cilt.77, sa.3, ss.626-634, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 77 Sayı: 3
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.dyepig.2007.09.003
  • Dergi Adı: DYES AND PIGMENTS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.626-634
  • Gazi Üniversitesi Adresli: Evet

Özet

Novel Ni(II) complexes of formazans containing -NO2, -COOH, -Cl, -Br, -CH3 groups in the o-, m-, p-positions of the I-phenyl ring were synthesized. The dyes were characterized using elemental analysis, FTIR, H-1 NMR, C-13 NMR, UV-vis and GC-mass spectra.. UV-vis spectra indicated that their lambda(max) was shifted to an extent that depended upon the type and position of the substituent on the ring; a broad absorption band was observed at 426-446 nm in CH2Cl2 at 25 degrees C. A linear correlation was obtained between Hammett substituent coefficients and lambda(max) values. (c) 2007 Elsevier Ltd. All rights reserved.