NDLI: Interfacial Complexation Reactions of $Sr^{2+}$ with Octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine Oxide for Understanding Its Extraction in Reprocessing Spent Nuclear Fuels

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Interfacial Complexation Reactions of $Sr^{2+}$ with Octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine Oxide for Understanding Its Extraction in Reprocessing Spent Nuclear Fuels

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Stockmann, Tom J. Zhang, Jing Lu, Yu Ding, Zhifeng Girault, Hubert H.
Description	Author Affiliation: Stockmann TJ ( Department of Chemistry, The University of Western Ontario, 1151 Richmond St., London, ON, N6A 5B7, Canada.)
Abstract	The complexation reactions between strontium $(Sr^{2+})$ and octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) were studied at the aqueous\|1,2-dichloroethane (w\|DCE) and aqueous\|room-temperature ionic liquid (w\|RTIL) microinterfaces, in order to understand its extraction in reprocessing spent nuclear fuels, remediation of environmental contamination, and potential radiological isotope feed stock for $^{90}Y$ from its isotope $^{90}Sr$ in fission byproducts. The stoichiometry (or metal to ligand ratios) and overall complexation constant (β) for these reactions at these two interfaces are described herein. Two stoichiometries at the w\|DCE interface were discovered, that is, $[Sr(CMPO)_{2}]^{2+}$ and $[Sr(CMPO)_{3}]^{2+}$ with β values of $4.5×10^{19}$ and $5.5×10^{25},$ respectively. Only one stoichiometry was observed at the w\|RTIL interface: $[Sr(CMPO)_{3}]^{2+}$ with β equal to $1.5×10^{34}.$ The larger complexation constant for $[Sr(CMPO)_{3}]^{2+}$ at the w\|RTIL interface than those found at the w\|DCE interface supported the previous observation of a greater distribution ratio in the aqueous–RTIL metal extraction than that in the aqueous–alkane processing. The kinetics of the reactions at the w\|RTIL interface was slow. The stoichiometries at the w\|DCE interface were confirmed using biphasic electrospray ionization mass spectrometry (BESI-MS) as well as direct injection of $Sr^{2+}$ and CMPO mixture by means of a “shaking flask” experiment to conventional ESI-MS.
ISSN	09476539
e-ISSN	15213765
Journal	Chemistry - A European Journal
Issue Number	47
Volume Number	17
Language	English
Publisher	Wiley-VCH;ChemPubSoc Europe
Publisher Date	2011-11-18
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Ethylene Dichlorides Chemistry Ionic Liquids Organometallic Compounds Spectrometry, Mass, Electrospray Ionization Strontium Kinetics Ligands Molecular Structure Research Support, Non-U.S. Gov't
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Catalysis

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Interfacial Complexation Reactions of Sr 2 + with Octyl ACHTUNGTRENNUNG ( phenyl )-N , N-diisobutylcarbamoylmethylphosphine Oxide for Understanding Its Extraction in Reprocessing Spent Nuclear Fuels

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Interfacial Complexation Reactions of $Sr^{2+}$ with Octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine Oxide for Understanding Its Extraction in Reprocessing Spent Nuclear Fuels

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