Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/230415
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | New nickel (II) and copper (II) bidentate Schiff base complexes, derived from dihalogenated salicylaldehyde and alkylamine: Synthesis, spectroscopic, thermogravimetry, crystallographic determination and electrochemical studies |
Autor: | Aggoun, D.; Fernández-García, Marta CSIC ORCID ; López García, Daniel CSIC ORCID ; Bouzerafa, B.; Ouennoughi, Y.; Setifi, F.; Ourari, A. | Palabras clave: | Bidentate Schiff base Nickel and copper complexes X-ray structural analysis Thermal decomposition Electrochemistry |
Fecha de publicación: | 2020 | Editor: | Elsevier | Citación: | Polyhedron 187 (2020) | Resumen: | Nickel and copper metal complexes of bidentate Schiff base ligand (HL) were synthesized in methanolic solution from a condensation reaction of alkylamine (4-methoxyethylphenylamine) and dihalogenated salicylaldehyde (3,5-dichlorosalicylaldehyde). Their structures have been elucidated using various conventional spectroscopic techniques such as elemental analyses, nucleic magnetic resonance (NMR) spectroscopy, infrared (IR) spectroscopy, electronic spectroscopy and thermogravimetry analysis. The Schiff base nickel complex was characterized by X-ray structural analysis at 170 (2) K. This compound crystallizes in the triclinic space group P-1, with unit cell parameters: a = 6.233 (5)Å, b = 8.586 (5) Å, c = 15.247 (5)Å, β = 98.324 (5)°. Structural analysis of the ligand showed two coordinated centers through iminic nitrogen atom and phenoxy oxygen atom leading to a distorted square-planar geometry. The molar conductance values effectively confirmed the non-electrolytic nature of the both complexes. Ultraviolet visible (UV–Vis.) spectra were performed in order to resolve the expected π-π* and n-π* azomethine electronic transitions of the ligand and the both complexes. The thermal decomposition of the synthesized complexes was studied by thermogravimetry and differential thermogravimetry (TG/DTG) between 25 and 800 °C using four different heating rates 5, 10, 15 and 20 °C/min. Four methods from the literature have been chosen to estimate the values of the activation energies and the pre-exponential factors of the thermal decomposition; those of Kissinger, Ozawa, Friedman and Coats-Redfern. Thermodynamic parameters such as ΔS, ΔH and ΔG were determined by using the Coats-Redfern's method. The electrochemical process was carried out by cyclic voltammetry (CV) in a tetrabutylammonium perchlorate (TBAP)/ dimethylformamide (DMF) 10 M as an electrolyte support. The prepared Schiff-base metal complexes displayed similar cyclic voltammetric behavior, exhibiting a quasi-reversible cathodic redox couple M(II)/M(I). | Versión del editor: | http://dx.doi.org/10.1016/j.poly.2020.114640 | URI: | http://hdl.handle.net/10261/230415 | DOI: | 10.1016/j.poly.2020.114640 | Identificadores: | doi: 10.1016/j.poly.2020.114640 issn: 0277-5387 |
Aparece en las colecciones: | (ICTP) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
accesoRestringido.pdf | 15,38 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
27
checked on 17-abr-2024
WEB OF SCIENCETM
Citations
19
checked on 23-feb-2024
Page view(s)
75
checked on 24-abr-2024
Download(s)
16
checked on 24-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.