Synthesis and investigation of thermal properties of vanadyl complexes with azo-containing Schiff-base dyes
Joint Authors
Falah, a.
Abd Shakir, Shayma A.
al-Balkhi, Abd al-Majid
al-Hamdani, Abbas Ali Salih
Source
Journal of Saudi Chemical Society
Issue
Vol. 20, Issue 5 (30 Sep. 2016), pp.487-501, 15 p.
Publisher
Publication Date
2016-09-30
Country of Publication
Saudi Arabia
No. of Pages
15
Main Subjects
Abstract EN
Azo-Schiff base compounds (L1 and L2) have been synthesized from the reaction of m-hydroxy benzoic acid with 1,5-dimethyl-3-[2-(5-methyl-1H-indol-3-yl)-ethylimino]-2-phenyl-2,3- dihydro-1H-pyrazol-4-ylamine and with 3-[2-(1H-indol-3-yl)-ethylimino]-1,5-dimethyl-2-phenyl- 2,3-dihydro-1H-pyrazol-4-ylamine.
The free ligands and their complexes were characterized based on elemental analysis, determination of metal, molar conductivity, (1H, 13C) NMR, UV–vis, FT-IR, mass spectra and thermal analysis (TGA).
The molar conductance data revealed that all the complexes are non-electrolytes.
The study of complex formation via molar ratio in DMF solution has been investigated and results were consistent to those found in the solid complexes with a ratio of (M:L) as (1:1).
Moreover, the thermodynamic activation parameters, such as DE*, DH*, DS*, DG*and K are calculated from the TGA curves using Coats–Redfern method.
Hyper Chem-6 program has been used to predict the structural geometries of compounds in gas phase.
The heat of formation (DHf) and binding energy (DEb) at 298 K for the free ligands and their vanadyl complexes were calculated by PM3 method.
The synthesized ligands and their metal complexes were screened for their biological activity against bacterial species, two Gram positive bacteria (Bacillus subtilis and Staphylococcus aureus) and two Gram negative bacteria (Escherichia coli and Pseudomonas aeruginosa).
American Psychological Association (APA)
al-Hamdani, Abbas Ali Salih& al-Balkhi, Abd al-Majid& Falah, a.& Abd Shakir, Shayma A.. 2016. Synthesis and investigation of thermal properties of vanadyl complexes with azo-containing Schiff-base dyes. Journal of Saudi Chemical Society،Vol. 20, no. 5, pp.487-501.
https://search.emarefa.net/detail/BIM-706473
Modern Language Association (MLA)
Abd Shakir, Shayma A.…[et al.]. Synthesis and investigation of thermal properties of vanadyl complexes with azo-containing Schiff-base dyes. Journal of Saudi Chemical Society Vol. 20, no. 5 (Sep. 2016), pp.487-501.
https://search.emarefa.net/detail/BIM-706473
American Medical Association (AMA)
al-Hamdani, Abbas Ali Salih& al-Balkhi, Abd al-Majid& Falah, a.& Abd Shakir, Shayma A.. Synthesis and investigation of thermal properties of vanadyl complexes with azo-containing Schiff-base dyes. Journal of Saudi Chemical Society. 2016. Vol. 20, no. 5, pp.487-501.
https://search.emarefa.net/detail/BIM-706473
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 500-501
Record ID
BIM-706473