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New bis(triazinyl) pyridines for selective extraction of americium(III)

Hudson, M.J., Boucher, C.E., Braekers, D., Desreux, J.F., Drew, M.G.B., Foreman, M.R.S., Harwood, L.M., Hill, C., Madic, C., Marken, F. and Youngs, T.G.A. (2006) New bis(triazinyl) pyridines for selective extraction of americium(III). New Journal of Chemistry, 30 (8). pp. 1171-1183. ISSN 1144-0546

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To link to this article DOI: 10.1039/b514108g

Abstract/Summary

New hydrophobic, tridentate nitrogen heterocyclic reagents (BATPs) such as 2,6-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydrobenzo[1,2,4]triazin-3-yl) pyridine (1) and 2,6-bis(9,9,10,10-tetramethyl-9,10-dihydro-1,2,4-triaza-anthrane-3-yl) pyridine (2) have been studied. I is resistant to hydrolysis in 3 M nitric acid, whereas 2 is resistant to both acid hydrolysis and radiolysis. The molecules are able to give significantly enhanced separations of americium(III) from an excess of europium(III) in nitric acid. Typically, for 1 D-Am = 500 and SFAm,/Eu = 5000 compared with D-Am = 30 and SFAm /Eu = 400 with the reference molecule 2,6-bis(isopropyl[1,2,4]triazin-3-yl) pyridine (7). In order to increase the stability of 1 and 2, the labile alpha-benzylic hydrogens that are present in 7 have been replaced by alkyl groups. Three molecules of 1 are able to enclose completely the coordination sphere of the M(III) in the crystal structure of [Y(1)(3)][Y(NO3)(5)]center dot NO3 center dot 2.5H(2)O.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:11347
Uncontrolled Keywords:PCB RADIOLYSIS RATES, LANTHANIDE COMPLEXES, NITROGEN LIGANDS, TRANSFORMER OIL, MINOR ACTINIDES, EUROPIUM(III), TRANSMUTATION, SEPARATION, MOLECULES, CHEMISTRY

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