Kinetics and thermodynamics of the reaction of iminodiacetate copper(II) complexes with 1,10- phenanthroline and 2,2‘-bipyridine in aqueous, anionic, cationic and nonionic surfactants solutions
Joanna Drzeżdżon , Agnieszka Piotrowska , Dariusz Wyrzykowski , Aleksandra Tesmar , Lech Chmurzyński , Dagmara Jacewicz
AbstractThe kinetics and thermodynamics have been studied for the reactions of the copper(II) complexes with iminodiacetate (ida), 2,2′-bipyridine (bipy) and 1,10-phenanthroline (phen) as ligands. The kinetics of substitution reactions of two aqua ligands for bipy and phen in the [Cu(ida)(H2O)2] coordination compound has been studied in water and three type of aqueous solutions of the following surfactants: anionic sodium dodecyl sulfate (SDS), cationic hexadecyl trimethyl-ammonium bromide (CTAB) and nonionic t-octylphenoxypolyetoxyethanol (Triton X-100). The progress of the substitution reactions in the studied solutions was monitored spectrophotometrically using the stopped-flow method. The studies have allowed the determination of the effect of the type of surfactant solutions on the rate of the substitution reaction. Moreover, the order of studied reactions has been determined. The research performed has also allowed us to propose the reaction mechanism of the [Cu(ida)(H2O)2] binary complex with chelate ligands (bipy or phen). In addition, the thermodynamic stability of complexes under study in aqueous solutions has been examined using the potentiometric titration method. Moreover, the potential scavenging activity of the copper(II) complexes has been investigated towards the superoxide radical.
|Journal series||Reaction Kinetics Mechanisms and Catalysis, ISSN 1878-5190, (A 15 pkt)|
|Publication size in sheets||0.55|
|Keywords in English||copper(II) complexes, kinetics, effect of micelle, surfactants, radical scavengers|
|Score||= 15.0, 24-07-2019, ArticleFromJournal|
|Publication indicators||: 2017 = 0.609; : 2017 = 1.515 (2) - 2017=1.407 (5)|
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