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Synthesis and Screening of Modified 6,6′-Bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydrobenzo[e][1,2,4]triazin-3-yl)-2,2′-bipyridine Ligands for Actinide and Lanthanide Separation in Nuclear Waste Treatment

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journal contribution
posted on 27.07.2016, 00:00 by Ashfaq Afsar, Petr Distler, Laurence M. Harwood, Jan John, James Westwood
Effects of chloro and bromo substitution at the 4-position of the pyridine ring of 6,6′-bis­(5,5,8,8-tetramethyl-5,6,7,8-tetrahydrobenzo­[e]­[1,2,4]­triazin-3-yl)-2,2′-bipyridine (CyMe4-BTBP) have been studied with regard to the extraction of Am­(III) from Eu­(III) and Cm­(III) from 0.1–3 M HNO3. Similarly to CyMe4-BTBP, a highly efficient (DAm > 10 at 3 M HNO3) and selective (SFAm/Eu > 100 at 3 M HNO3) extraction was observed for Cl-CyMe4-BTBP and Br-CyMe4-BTBP in 1-octanol but in the absence of a phase-transfer agent.