ABSTRACT

The formation of the binary Cu(II)-1,10ʹ-Phenanthroline (Phen, L) in aqueous solution was studied by means of electromotive force measurements (EMF). In addition, the Cu(II)-2,2ʹ-Bipyridine (Bipy, L) and Cu(II)-1,10ʹ-Phenanthroline ternary complexes were studied using the low molecular weight blood serum ligands: lactate (Lac⁻), Oxalate (Ox^2-), citrate (Cit^3-) and Phosphate (PO₄^3-), in aqueous medium, at 25°C and using 1.0 mol.dm⁻³ KNO₃ as ionic medium. The data obtained by potentiometric measurements were analysed using the LETAGROP least squares software. For the binary Cu(II)-1,10ʹ-Phenanthroline system the complexes [Cu(Phen)]²⁺, Cu(OH)₂(Phen) and [Cu₂(OH)₂(Phen)₂]²⁺ were detected. In the case of the ternary Cu(II)-L-Lac ^– system the species [Cu(L)(Lac)]⁺, Cu(Bipy)(Lac)(OH) and [Cu(Bipy)(Lac)(OH)2]⁻ were observed, for the Cu(II)-L-Ox^{2 –} system the complexes Cu(L)(Ox) and [Cu(L)(Ox)(OH)]⁻ were obtained whereas for Cu(II)-L-Cit^{3 –} system the species [Cu(L)(H₂Cit)]⁺, Cu(L)(HCit) and [Cu(L)(Cit)]⁻ were observed, and finally, in the Cu(II)-L-PO₄^{3 –} system the complexes[Cu(L)(H₂PO₄)]⁺, Cu(L)(HPO₄), [Cu(L)(PO₄)]− and [Cu(Bipy)(PO₄)(OH)]₂⁻ were detected.

摘要

通过电动势测量 (EMF) 研究了水溶液中二元 Cu(II)-1,10ʹ-Phenanthroline (Phen, L) 的形成。此外，使用低分子量血清配体研究了 Cu(II)-2,2ʹ-Bipyridine (Bipy, L) 和 Cu(II)-1,10ʹ-Phenanthroline 三元配合物：乳酸盐 (Lac ^- )、草酸盐(Ox ^2- )、柠檬酸盐(Cit ^3- )和磷酸盐(PO ₄ ^3- )，在水性介质中，在25℃下，使用1.0 mol.dm ^-3 KNO ₃作为离子介质。使用 LETAGROP 最小二乘软件分析通过电位测量获得的数据。对于二元 Cu(II)-1,10ʹ-菲咯啉体系，络合物 [Cu(Phen)] ²⁺ , Cu(OH)₂ (Phen) 和[Cu ₂ (OH) ₂ (Phen) ₂ ] ²⁺被检测到。在三元 Cu(II)-L-Lac ^–系统的情况下，物种 [Cu(L)(Lac)] ⁺、Cu(Bipy)(Lac)(OH) 和 [Cu(Bipy)(Lac)(OH) )2] ^-被观察到，对于 Cu(II)-L-Ox ^{2 -}系统获得了复合物 Cu(L)(Ox) 和 [Cu(L)(Ox)(OH)] ^-而对于 Cu(II) )-L-Cit ^{3 –}系统 [Cu(L)(H ₂ Cit)] ⁺、Cu(L)(HCit) 和 [Cu(L)(Cit)] ^-被观察到，最后，在 Cu (II)-L-PO ₄ ^{3 –}系统络合物[Cu(L)(H₂ PO ₄ )] ⁺、Cu(L)(HPO ₄ )、[Cu(L)(PO ₄ )]- 和[Cu(Bipy)(PO ₄ )(OH)] ₂ ^-被检测到。