Oligo-ortho-chloroazomethinephenol and its metal complexes: Synthesis, characterization, antimicrobial and thermal properties
Küçük Resim Yok
Tarih
2005
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
TAYLOR & FRANCIS INC
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The new Schiff base oligomer (oligo-ortho-chloroazomethinephenol) was synthesized by the condensation of ortho-chloroaniline with oligosalicylaldehyde (OSA). Oligomer-metal complexes of oligo-ortho-chloroazomethinephenol (OKAP) with Cu(II), Zn(II) and Co(II) were synthesized. The properties of OKAP and oligomermetal complexes were studied by elemental, UV-Vis, H-1-NMR, FT-IR, magnetic susceptibility analyses. The number average molecular weight and mass average molecular weight OKAP were found to be 1494 g (.) mol(-1) and 5418g (.) mol(-1), respectively. Elemental analyses of oligomer-metal complexes suggest that the ratio of metal to oligomer is 1:2. The results indicate that the OKAP coordinate through azomethine nitrogen and phenolic oxygen to the metal ions. Antimicrobial activity of OKAP was tested against S. cerevisiae, B. subtilis, E. coli, K. pneumoniae, M. luteus and S. aureus. The thermal stabilities of the OKAP and oligomer-metal complexes were compared by ther-mogravimetric (TG) analyses. According to TG, OKAP, and oligomer-metal complexes were stable against temperature and thermooxidative decomposition. The weight losses of OKAP and oligomer-metal complexes were found to be at 400 and 800 degrees C at 20.2 and 50.0 (OKAP), 17.1 and 41.1 (Cu(II)), 13.4 and 38.5 (Zn(II)), 18.3 and 68.2 (Co(II)), %, respectively. Based on half degradation temperature (T-50%) parameters, Cu(II) and Zh(II) complexes were more resistant than the OKAP and Co(H) complex.
Açıklama
Anahtar Kelimeler
Schiff base oligomer, thermal properties, antimicrobial properties, metal complexes
Kaynak
JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
A42
Sayı
9
