Multiphoton dissociation of some volatile uranyl complexes. I. The phenomena of reversible and permanent dissociation
Abstract
Bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato) dioxo uranium (VI) is stable and volatile at ≈120°C, particularly with a ligand such as ammonia or trimethyl phosphate, and susceptible to multiphoton dissociation (mpd) via tle uranyl asymmetric vibration at ≈950 cm -1. There are two dissociation paths: (i) detachment of the ligand at fluences below 0.2 J cm -2; (ii) permanent dissociation Of UO 2(hfacac) 2 into UO 2F 2 and a furanone C 5F 5O 2H at fluences above 0.6 J cm -2. Ligand detachment appears to be a conventional unimolecular mpd reaction describable by master equations in spite of the remarkably low fluence threshold. Permanent dissociation shows much greater chemical complexity.
- Publication:
-
Chemical Physics
- Pub Date:
- November 1982
- DOI:
- 10.1016/0301-0104(82)87064-X
- Bibcode:
- 1982CP.....72...41E