Selective Extraction of Lithium with a Macrocyclic Trinuclear Complex of (1,3,5-Trimethylbenzene)ruthenium(II) Bridged by 2,3-Dioxopyridine

A macrocyclic trinuclear complex of (1,3,5-trimethylbenzene)ruthenium(II) bridged by 2,3-dioxopyridine was synthesized, and the extraction properties for lithium and sodium picrates were investigated in a dichloromethane/water system at 25°C. The complex was found to have extremely high extractabili...

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Published inAnalytical Sciences Vol. 24; no. 10; pp. 1215 - 1217
Main Authors KATSUTA, Shoichi, IMOTO, Takahiro, KUDO, Yoshihiro, TAKEDA, Yasuyuki
Format Journal Article
LanguageEnglish
Published Singapore The Japan Society for Analytical Chemistry 01.10.2008
Springer Nature Singapore
Japan Science and Technology Agency
Subjects
Analytical Chemistry
Chemistry
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Summary:A macrocyclic trinuclear complex of (1,3,5-trimethylbenzene)ruthenium(II) bridged by 2,3-dioxopyridine was synthesized, and the extraction properties for lithium and sodium picrates were investigated in a dichloromethane/water system at 25°C. The complex was found to have extremely high extractability and selectivity for lithium picrate; the logarithmic values of the extraction constants are 5.86 and 2.63 for Li+ and Na+, respectively. By using this complex as an extractant, nearly quantitative extraction and separation of Li+ from Na+ could be achieved by a single extraction.
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ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.24.1215