Multi-properties of a new azo-Schiff base and its binuclear copper(II) chelate: Preparation, spectral characterization, electrochemical, potentiometric and modeling studies
| Autor: | Munire Sarigul, Duran Karakaş, Hasan Atabey, Pervin Deveci, Sultan Erkan Kariper, Mukerrem Kurtoglu |
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| Přispěvatelé: | [Sarigul, Munire -- Kurtoglu, Mukerrem] Kahramanmaras Sutcu Imam Univ, Dept Chem, TR-46050 Kahramanmaras, Turkey -- [Kariper, Sultan Erkan -- Karakas, Duran] Cumhuriyet Univ, Dept Chem, TR-58140 Sivas, Turkey -- [Deveci, Pervin] Selcuk Univ, Dept Chem, TR-42075 Selcuklu, Konya, Turkey -- [Atabey, Hasan] Gaziosmanpasa Univ, Dept Chem, TR-60150 Tokat, Turkey, Deveci, Pervin -- 0000-0002-0981-5375 |
| Rok vydání: | 2017 |
| Předmět: |
Supporting electrolyte
Potentiometric titration Inorganic chemistry Copper(II) chelate chemistry.chemical_element Theoretical calculations 010402 general chemistry Electrochemistry 01 natural sciences Analytical Chemistry Inorganic Chemistry Benzaldehyde chemistry.chemical_compound Polymer chemistry Spectroscopy Schiff base 010405 organic chemistry Ligand Organic Chemistry Copper 0104 chemical sciences Azo-Schiff base chemistry Cyclic voltammetry Stability |
| Zdroj: | Journal of Molecular Structure. 1149:520-529 |
| ISSN: | 0022-2860 |
| Popis: | WOS: 000413387300054 In this study, chromophore group containing a new Schiff base ligand 2-{(E)-[(3-hydroxy-4-methoxyphenyl)imino]methy1}-4-[(E)-phenyldiazenyl]phenol H(2)L3/2H(2)O, formed by the 1:1 M condensation of 5-amino-2-methoxyphenol with 2-hydroxy-5-[(E)-phenyldiazenyl]benzaldehyde and the binuclear copper(II) chelate of this ligand have been prepared. The structures of the ligand and its Cu(II) chelate have been elucidated on the basis of elemental analyses, conductivity measurements, spectral (FT-IR, H-1 and C-13 NMR and UV.-Vis.), electrochemical studies and theoretical calculations. Cu(II) ion coordinates with the ligand through the oxygen of the phenolic and nitrogen of azomethine group. The redox behaviors of the ligand and its binuclear Cu(II) chelate were investigated in DMSO solution containing 0.1 M tetrabutylammoniumtetrafluoroborate (TBATFB) as supporting electrolyte by cyclic voltammetry (CV). Five dissociation constants were determined for the prepared azo-Schiff base ligand as 3.25 (PKa1), 5.51 (pK(a2)), 7.18 (pK(a3)), 9.60 (pK(a4)) and 11.10 (pK(a5)). Also, the stability constants of the Cu(II) chelate have been calculated by SUPERQUAD computer program and general mechanisms have been proposed with regard to the formation of the complex. (C) 2017 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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