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Gas-phase coordination complexes of (UO22+)-O-VI, (NpO22+)-O-VI, and (PuO22+)-O-VI with dimethylformamide
Rutkowski, Philip X.
Gibson, John K.
Van Stipdonk, Michael J.
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Rutkowski, Philip X.; Rios, Daniel; Gibson, John K. and Michael J., Van Stipdonk. 2011. Gas-phase coordination complexes of (UO22+)-O-VI, (NpO22+)-O-VI, and (PuO22+)-O-VI with dimethylformamide. Journal of the American Society for Mass Spectrometry, 22 (11):2042-2048.
Electrospray ionization of actinyl perchlorate solutions in H2O with 5% by volume of dimethylformamide (DMF) produced the isolatable gas-phase complexes, [An(VI)O(2)(DMF)(3)(H2O)](2+) and [An(VI)O(2)(DMF)(4)](2+), where An = U, Np, and Pu. Collision-induced dissociation confirmed the composition of the dipositive coordination complexes, and produced doubly-and singly-charged fragment ions. The fragmentation products reveal differences in underlying chemistries of uranyl, neptunyl, and plutonyl, including the lower stability of Np(VI) and Pu(VI) compared with U(VI).
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