title: Characterization of redox sensitive plutonium(III) complexed with alkylated 2,6-ditriazinylpyridine (BTP) in organic solution.
abstract: Spectroscopic, solvent extraction methods and computational chemistry are applied for the characterization of redox sensitive trivalent plutonium complexed with the N-donor extracting agent alkylated 2,6-ditriazinylpyridines (n-C3H7-BTP) in organic solution. The redox stabilization and speciation of Pu(III) is discussed. Extraction of Pu(III) with n-C3H7-BTP is compared to that for redox stable Am(III). The speciation of Pu(III) with n-C3H7-BTP in organic solution is studied by UV-Vis/NIR and XAFS spectroscopy. Only the 1:3 complex, [Pu(n-C3H7-BTP)3](3+) is observed to form, which is confirmed by EXAFS and solvent extraction. The [Pu(n-C3H7-BTP)3](3+) complex is compared to the isostructural U(III), Am(III), and Cm(III) complexes studied earlier.
authors.affiliation: Karlsruher Institut für Technologie (KIT), Institut für Nukleare Entsorgung, P.O. Box 3640, 76021, Karlsruhe, Germany. nidhu.banik@kit.edu.
authors.forename: Nidhu L
authors.initials: NL
authors.lastname: Banik
authors.forename: Bernd
authors.initials: B
authors.lastname: Schimmelpfennig
authors.forename: Christian M
authors.initials: CM
authors.lastname: Marquardt
authors.forename: Boris
authors.initials: B
authors.lastname: Brendebach
authors.forename: Andreas
authors.initials: A
authors.lastname: Geist
authors.forename: Melissa A
authors.initials: MA
authors.lastname: Denecke