2012•Wuji huaxue xuebaoRequires access
Effect of 3-Oxy-diglycolamides Structure on the Extraction Behavior of Gd(III)
Jin Yang
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Abstract
Four asymmetric diglycolamides: N,N′-dimethyl-N,N′-diphenyl-3-oxa-diglycolamide(DMDPhDGA),N,N′-dimethyl-N,N′-didecyl-3-oxa-diglycolamide(DMDDDGA),N,N′-dimethyl-N,N′-dihexyl-3-oxa-diglycolamide(DMDHDGA),N,N′-dimethyl-N,N′-dioctyl-3-oxa-diglycolamide(DMDODGA) were synthesized.The extraction of Gd(Ⅲ) with N,N,N′,N′-tetrabutyl-3-oxa-diglycolamide(TBDGA) and the above extractants from nitric acid using CHCl3 as diluent was studied.The extraction capability decrease in the order: DMDHDGA DMDDDGA DMDODGA DMDPhDGA TBDGA.The effect of water phase acidity and concentration of extractant on the extraction distribution ratio has been measured.The extraction mechanism has been shown that three extractant molecules were coordinated to a metal ion.The structure-function relationship was explained by IR spectra.