Complexation of Polyethylene Glycol with Sr2+ and Ba2+ Cations in Extracts Containing Chlorinated Cobalt Dicarbollide Full article
Journal |
Radiochemistry
ISSN: 1066-3622 |
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Output data | Year: 2004, Volume: 46, Number: 6, Pages: 587-592 Pages count : 6 DOI: 10.1007/s11137-005-0033-6 | ||||||||
Tags | Phenyl; Oxygen Atom; Hydrogen Atom; Coordination Sphere; Polyethylene Glycol | ||||||||
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Affiliations |
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Funding (1)
1 | United States Department of Energy | 81995 |
Abstract:
The composition and structure of complexes that are formed in the system consisting of chlorinated cobalt dicarbollide (CCD), polyethylene glycol (PEG), and Sr2+ or Ba2+ in a polar diluent, dichloroethane or phenyl trifluoromethyl sulfone, were studied by IR and NMR spectroscopy. In extraction of Sr2+ and Ba2+ with solutions of [Н5O2+·PEG]CCD-, the organic phase contains the ionic associates [M2+·PEG]CCD 2 - . The Sr2+ and Ba2+ complexes have similar composition and structure: The oxygen atoms of two OH groups and six COC groups of a PEG molecule fill the first coordination sphere of the metal ions. Also, no more than two water molecules can be coordinated in the second sphere, forming hydrogen bonds with the hydrogen atoms of two OH groups of PEG. The coordination of the OH groups of PEG with the Sr2+ and Ba2+ ions is preferable over the coordination of the COC groups, as follows from the fact that the extraction of Sr2+ and Ba2+ with CCD-PEG mixtures gets worse on replacement of the OH groups of PEG by other substituents. A considerable increase in the efficiency of Sr2+ and Ba2+ extraction with H-CCD solutions in the presence of PEG is due to the fact that all the H2O molecules in the first coordination spheres of the M 2+ ions are replaced by the COC and OH groups of PEG with the formation of a hydrophobic complex [M2+·PEG](H2O)2.© 2004 MAIK "Nauka/Interperiodica".
Cite:
Stoyanov E.S.
, Smirnov I.V.
, Babain V.A.
, Antonov N.G.
, Peterman D.
, Herbs R.S.
, Todd T.A.
, Luther T.A.
Complexation of Polyethylene Glycol with Sr2+ and Ba2+ Cations in Extracts Containing Chlorinated Cobalt Dicarbollide
Radiochemistry. 2004. V.46. N6. P.587-592. DOI: 10.1007/s11137-005-0033-6 Scopus РИНЦ
Complexation of Polyethylene Glycol with Sr2+ and Ba2+ Cations in Extracts Containing Chlorinated Cobalt Dicarbollide
Radiochemistry. 2004. V.46. N6. P.587-592. DOI: 10.1007/s11137-005-0033-6 Scopus РИНЦ
Original:
Стоянов Е.С.
, Смирнов И.В.
, Бабаин В.А.
, Антонов Н.Г.
, Петерман Д.
, Хербст Р.С.
, Тодд Т.А.
, Лутер Т.А.
Комплексообразование полиэтиленгликоля с катионами Sr 2+ и Ва 2+ в экстрактах, содержащих хлорированный дикарболлид кобальта
Радиохимия. 2004. Т.46. №6. С.540-545. РИНЦ
Комплексообразование полиэтиленгликоля с катионами Sr 2+ и Ва 2+ в экстрактах, содержащих хлорированный дикарболлид кобальта
Радиохимия. 2004. Т.46. №6. С.540-545. РИНЦ
Dates:
Submitted: | Dec 1, 2003 |
Published print: | Nov 1, 2004 |
Identifiers:
Scopus | 2-s2.0-17844409106 |
Elibrary | 13465420 |
Chemical Abstracts | 2005:121866 |
Chemical Abstracts (print) | 142:398447 |
OpenAlex | W1974793570 |