Synthesis and characterization of actinide-exchanged Preyssler heteropolyanions [AnP5W30O110]n- (An=Th, Am, Cm)

被引:22
作者
Antonio, MR [1 ]
Williams, CW [1 ]
Soderholm, L [1 ]
机构
[1] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA
关键词
heteropolyoxometalate clusters; actinide complexants; preyssler heteropolytungstate anion; actinide exchange; cyclic voltammetry;
D O I
10.1016/S0925-8388(98)00231-X
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Interest in the use of heteropolyoxometalate clusters as actinide complexants motivates our studies of the Preyssler heteropolytungstate anion, [NaP5W30O110](14-), and its actinide-exchanged derivatives, [AnP(5)W(30)O(110)](n-). Under specific conditions, substitution of Na+ is possible by La3+ and Th4+ as well as by U4+ and the transuranics Am3+ and Cm3+. Both [AnP(5)W(30)O(110)](11-) (for An = Th4+, U4+) and [AnP(5)W(30)O(110)](12-) (for An=Am3+, Cm3+) as well as [LaP5W30O110](12-) exhibit remarkable redox properties and form heteropoly blues. Although similar, the electrochemistry of the An(3+)/La3+- and An(4+)-exchanged anions are different and distinguishable by cyclic voltammetry in aqueous mineral acid electrolytes. The synthesis of the new Preyssler anion complexes of La3+, Th4+, Am3+, and Cm3+ will be described along with results from cyclic voltammetry measurements. (C) 1998 Elsevier Science S.A.
引用
收藏
页码:846 / 849
页数:4
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