Conroy, Nathan A. published the artcileA Novel Method for Tracer Concentration Plutonium(V) Solution Preparation, Synthetic Route of 4551-69-3, the publication is Analytical Chemistry (Washington, DC, United States) (2016), 88(8), 4196-4199, database is CAplus and MEDLINE.
Preparation of relatively pure low concentration Pu(V) solutions for environmental studies is nontrivial due to the complex redox chem. of Pu. Ozone gas generated by an inexpensive unit designed for household-use was used to oxidize a 2 × 10-8 M Pu(IV) solution to predominantly Pu(VI) with some Pu(V) present. Over several days, the Pu(VI) in the solution reduced to Pu(V) without further reducing to Pu(IV). The reduction from Pu(VI) to Pu(V) could be accelerated by raising the pH of the solution, which led to an immediate conversion without substantial conversion to Pu(IV). The aqueous Pu is stable as predominately Pu(V) for greater than one month from pH 3-7; however, at circumneutral pH, a sizable fraction of Pu was lost from solution by either precipitation or sorption to the vial walls. This method provides a fast means of preparing Pu(V) solutions for tracer concentration studies without numerous extraction or cleanup steps.
Analytical Chemistry (Washington, DC, United States) published new progress about 4551-69-3. 4551-69-3 belongs to pyrazoles-derivatives, auxiliary class Benzenes, name is 4-Benzoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, and the molecular formula is C17H14N2O2, Synthetic Route of 4551-69-3.
Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics