Synthesis, crystal structure, spectroscopic, thermal, catechol oxidase and catalase-like studies: New copper(II) complexes of 2-benzoylbenzoate and 2-pyridilpropanol ligands

ÇAĞLAR S., Adiguzel E., ÇAĞLAR B., Saykal T., ŞAHİN E., BÜYÜKGÜNGÖR O.

INORGANICA CHIMICA ACTA, cilt.397, ss.101-109, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 397
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.ica.2012.11.028
  • Dergi Adı: INORGANICA CHIMICA ACTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.101-109
  • Anahtar Kelimeler: Dinuclear copper(II) complex, 2-Benzoylbenzoic acid, Crystal structure, Catechol oxidation, Catalase activity, MAGNETIC-PROPERTIES, MOLECULAR-STRUCTURE, DICOPPER COMPLEXES, H-BPMP, OXIDATION, ACID, MODEL, MECHANISM, BASE, CU
  • Atatürk Üniversitesi Adresli: Evet

Özet

Two novel copper(II) complexes, mononuclear [Cu(bba)(2)(pypr)(2)] 1 and dinuclear [Cu-2(bba)(2)(pypr)(2)] 2, have been synthesized by reactions of 2-pyridilpropanol with CuSO4 center dot 5H(2)O or Cu(CH3COO)(2)center dot 2H(2)O metal salt in the presence of 2-benzoylbenzoic acid. The copper(II) ion has a distorted octahedral geometry in 1 and distorted square pyramidal geometry in 2. 1 crystallizes in space group P (1) over bar, while 2 crystallizes in the monoclinic crystal system with the space group P2(1)/n. 2-Benzoylbenzoate behaves as a monodentate in 1, bidentate in 2. 2-pyridilpropanol ligand acts as a bidentate in 1 and bridging in 2. Both complexes were characterized by elemental analysis, mass and IR spectroscopy. Their molecular structures were determined by X-ray crystal structure analysis and their thermal stabilities were confirmed by TG/DTA/DTG techniques. Dinuclear compound shows high catalytic activity regarding the oxidation of 3,5-di-tert-butylcatechol to 3,5-di-tert-butylquinone exhibiting saturation kinetics at high substrate concentrations. In addition, dinuclear compound demonstrates significantly catalase-like activity. But mononuclear complex shows neither catalase-like nor catechol oxidase activity. (C) 2012 Elsevier B. V. All rights reserved.