Spectroscopic and biological activities studies of bivalent transition metal complexes of Schiff bases derived from condensation of 1,4-phenylenediamine and benzopyrone derivatives
| Autor: | Nora S. Abdel-Kader, Omaima E. Sherif |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Antifungal Agents
Spectrophotometry Infrared Stereochemistry Phenylenediamines Analytical Chemistry law.invention Transition metal law Coordination Complexes Transition Elements Chelation Benzopyrenes Thermal analysis Electron paramagnetic resonance Instrumentation Spectroscopy Schiff Bases biology Bacteria Molecular Structure Chemistry Electron Spin Resonance Spectroscopy Fungi biology.organism_classification Magnetic susceptibility Atomic and Molecular Physics and Optics Staphylococcus capitis Anti-Bacterial Agents Thermogravimetry Spectrophotometry Ultraviolet Antibacterial activity Benzopyrone Nuclear chemistry |
| Zdroj: | Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy. 117 |
| ISSN: | 1873-3557 |
| Popis: | Many tools of analysis such as elemental analyses, infrared, ultraviolet–visible, electron spin resonance (ESR) and thermal analysis, as well as conductivity and magnetic susceptibility measurements were used to elucidate the structures of the newly prepared Co(II), Ni(II) and Cu(II) complexes with Schiff bases derived from the condensation of 1,4-phenylenediamine with 6-formyl-7-hydroxy-5-methoxy-2-methylbenzo-pyran-4-one (H2L) or 5,7-dihydroxy-6-formyl-2-methylbenzopyran-4-one (H4L). The data showed that all formed complexes are 1:1 or 2:2 (M:L) and non-electrolyte chelates. The Co(II) and Cu(II) complexes of the two Schiff bases were screened for antibacterial activities by the disk diffusion method. The antibacterial activity was screened using Escherichia coli and Staphylococcus capitis but the antifungal activity was examined by using Aspergillus flavus and Candida albicans. The Results showed that the tested complexes have antibacterial, except Cu H4L, but not antifungal activities. |
| Databáze: | OpenAIRE |
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