Multiphoton dissociation of some volatile uranyl complexes. I. The phenomena of reversible and permanent dissociation

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:...

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Published in:Chemical physics 1982-11, Vol.72 (1-2), p.41-49
Main Authors: Eberhardt, J.E., Hoare, I.E., Johnson, D.A., Knott, R.B., Pryor, A.W., Waugh, A.B.
Format: Article
Language:English
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Summary: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 UO2(hfacac)2 into UO2F2 and a furanone C5F5O2H 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.
ISSN:0301-0104
DOI:10.1016/0301-0104(82)87064-X