Binuclear and mononuclear Cu(II) and Ni(II) complexes of tetra- and hexadentate ligands
Küçük Resim Yok
Tarih
2017
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Two tetradentate ligands, 1,2-bis(2-hydroxyethylthio)ethane S2O2 (L (1) ) and N,N'-bis(2-hydoxypropyl)piperazine N2O2 (L (2) ), were prepared by organization of some mononuclear complexes of Cu(II) and Ni(II). A new binuclear Schiff base ligand with a 1,4-dipropoxybutane spacer provided by the reaction of salicylaldehyde and 1,4-bis(3-aminopropoxy)butane served as an octadentate, N2O4 (L (3) ) ligand, in designing some binuclear complexes with metal ions. All the ligands were characterized by elemental analyses, FTIR, H-1 and C-13 NMR and GC-MS. The complexes were characterized by elemental analyses, FTIR, thermal methods, electronic spectra, conductivity and magnetic measurements. The metal ions coordinate to the ligands with four donor atoms in square planar geometry. The thermal stabilities of the complexes were discussed in terms of metal ions and type of donor atoms. The complexes were characterized by electronic spectra and magnetic susceptibility measurements to establish the proposed four-coordinated square planar geometry. The TG chart indicates high thermal stability for complexes. The decomposition processes consisted of three stages: The first two stages involve the loss of water and chloride anions and the last stage indicates degradation of the organic ligands. The antifungal activity of the ligands and their complexes was tested against several fungal species: Aspergillus nigar, Aspergillus flavus and Candida albicans. The results show that complexes have significant antifungal activities compared to their parent ligands.
Açıklama
Anahtar Kelimeler
Binuclear Complex, Octadentate Ligand, TG-DTA, Thermal Stability, Antifungal Activity, Schiff-Base Ligands, Ray Crystal-Structures, Copper(Ii) Complexes, Inorganic Chromophores, Electronic-Properties, Biological-Activity, Metal-Complexes, 1st Evidence, Nickel(Ii), Thiosemicarbazones
Kaynak
Journal Of Thermal Analysis And Calorimetry
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
129
Sayı
1
