Gas-phase coordination complexes of (UO22+)-O-VI, (NpO22+)-O-VI, and (PuO22+)-O-VI with dimethylformamide

Gas-phase coordination complexes of (UO22+)-O-VI, (NpO22+)-O-VI, and (PuO22+)-O-VI with dimethylformamide

Rutkowski, Philip X.; Rios, Daniel; Gibson, John K.; Van Stipdonk, Michael J.

URI: http://hdl.handle.net/10057/5172
http://dx.doi.org/10.1007/s13361-011-0226-5

Date: 2011-11

Abstract:

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).