Mixed-ligand Copper(II) Complexes: Investigation of their Spectroscopic, Catalysis, Antimicrobial and Potentiometric Properties |
| |
Authors: | Mehmet Tümer Nihal Deligönül Ay?egül Gölcü Eyüp Akgün Mustafa Dolaz Havva Demirelli Metin D??rak |
| |
Institution: | 1. Department of Chemistry, Faculty of Science and Arts, University of Kahramanmara? Süt?ü Imam, Kahramanmara?, Turkey 2. Department of Chemistry, Faculty of Education, Gazi University, Ankara, Turkey 3. Department of Biology, Faculty of Science and Arts, University of Kahramanmara? Süt?ü Imam, Kahramanmara?, Turkey
|
| |
Abstract: | Schiff base ligands HL1–HL6 have been prepared from the reaction of 2,6-diformyl-4-t-butylphenol and 2,6-di-formyl-4-methylphenol with various aromatic amines in ethanolic solution. The Schiff base ligands
2,2′-dipyridine (dp) mixed-ligand CuII complexes have been obtained. Mixed-ligand CuII complexes containing the dp ligand have ionic nature and they conduct the electricity in solution media. The complexes have
been obtained in two different forms: one of them is Cu2(Ln)Cl3] (n: 1, 2, 3, 4, 5 and 6) and other complexes have the general formula Cu2(Ln)(dp)2]3Cl. Ligands and their complexes have been characterized by elemental analyses, FT-IR, electronic spectra, molar conductance,
1H(13C)-n.m.r. and mass spectral data. Their stoichiometric protonation constants have been determined potentiometrically in dioxan
using a combined pH electrode at 25 °C, under a nitrogen atmosphere. For the calculation of the protonation constants, PKAS
computer programme has been used. The effects of the substituents on the protonation constants and the additivities of these
effects are discussed. The antimicrobial activity studies of the ligands and their complexes have been studied against the
Bacillus megaterium, Micrococcus luteus, Corynebavterium xenosis, Enterococcuc faecalis, bacteria and Saccoramyces cerevisia, yeast. The catalytic properties of the complexes have been studied on the ascorbic acid, catechol and 2,6-di-t-butylphenol substrates. Thermal behaviour of the complexes has been studied by thermal techniques. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|