Bożejewicz Daria, Ośmiałowski Borys, Kaczorowska Małgorzata Anna, Witt Katarzyna
Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, 3 Seminaryjna, PL 85326 Bydgoszcz, Poland.
Faculty of Chemistry, Nicolaus Copernicus University, 7 Gagarin Street, PL 87100 Toruń, Poland.
Membranes (Basel). 2021 Mar 25;11(4):233. doi: 10.3390/membranes11040233.
In this paper, the application of new substituted 2,6-bis((benzoyl-R)amino)pyridine (R = H, 4-Me, and 4-NMe) derivatives for the recovery of copper(II), nickel(II), cobalt(II), and zinc(II) ions from aqueous solutions was described. The structures of the synthesized compounds were confirmed by nuclear magnetic resonance spectroscopy (NMR), electrospray ionization high-resolution mass spectrometry (ESI HRMS), and tandem mass spectrometry methods (HCD MS/MS). Three different derivatives of 2,6-bis((benzoyl-R)amino)pyridine were used as carriers in membrane processes and as extractants in classic solvent extraction. In each case, the single derivative recovery was carried out on a model solution that contained only one type of metal ions. Spectrophotometry studies were performed to determine the stability constants of the complexes formed by the synthesized species with analyzed metals ions. The results obtained indicate that the synthesized compounds form stable complexes with Cu(II), Ni(II), Co(II), and Zn(II) ions and can be used in both types of studied recovery processes. However, the effectiveness of the synthesized compounds in the recovery of metal ions depends both on the structure of compounds and properties of metals as well as on their concentration.
本文描述了新型取代的2,6-双((苯甲酰基-R)氨基)吡啶（R = H、4-Me和4-NMe）衍生物在从水溶液中回收铜(II)、镍(II)、钴(II)和锌(II)离子方面的应用。通过核磁共振光谱（NMR）、电喷雾电离高分辨率质谱（ESI HRMS）和串联质谱方法（HCD MS/MS）确认了合成化合物的结构。2,6-双((苯甲酰基-R)氨基)吡啶的三种不同衍生物在膜过程中用作载体，在经典溶剂萃取中用作萃取剂。在每种情况下，对仅含有一种金属离子类型的模型溶液进行单一衍生物回收。进行分光光度法研究以确定合成物质与分析的金属离子形成的配合物的稳定常数。获得的结果表明，合成化合物与Cu(II)、Ni(II)、Co(II)和Zn(II)离子形成稳定的配合物，可用于两种研究的回收过程。然而，合成化合物在回收金属离子方面的有效性既取决于化合物的结构和金属的性质，也取决于它们的浓度。
