Sorption and desorption of copper (II) cations on ethylenediamine phosphonic polyampholytes according to EPR data
- Authors: Volkov V.I.1, Avilova I.A.1
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Affiliations:
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences
- Issue: Vol 89, No 10 (2025)
- Pages: 1566–1572
- Section: Physics of magnetic phenomena: fundamental and applied research using magnetic resonance methods
- URL: https://ogarev-online.ru/0367-6765/article/view/375820
- DOI: https://doi.org/10.7868/S3034646025100075
- ID: 375820
Cite item
Abstract
The composition of polymer complexes of divalent copper in macroporous polyampholytes based on styrene-divinylbenzene copolymers containing phosphonic groups —CH2PO(OH)2 and ethylenediamine —CH2NH(CH2)2NH2 (en) groups was determined using the EPR method. It was shown that at low degrees of filling, polymer complexes [Cu(en)2(H2O)2]2+ containing 4 nitrogen atoms (complexes A) are formed. With further filling, complexes containing 2 nitrogen atoms [Cu(en)(H2O)4]2+ (complexes B), complexes with phosphonic groups Cu(R – HPO3)2(H2O)4 (complexes C) and aqua complexes Cu(H2O)62+ (complexes D) are also observed. Desorption of copper (II) ions by hydrochloric acid is accompanied by the rapid destruction of copper (II) complexes with ethylenediamine groups and the formation of copper (II) complexes with phosphonic groups and aqua complexes.
Keywords
About the authors
V. I. Volkov
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences
Email: vitwolf@mail.ru
Chernogolovka, Russia
I. A. Avilova
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of SciencesChernogolovka, Russia
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