Luminescence of uranyl ions in phosphate glass and phosphoric acid, spontaneous reduction to uranium(IV) and new description of the electron transfer bands

Naomi Lieblich-sofer*, Renata Reisfeld, Christian K. Jørgensen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

The absorption and emission spectra of the uranyl ion in phosphate glass and in 85 percent phosphoric acid are similar to the dilute aqueous solution, but the luminescence yield is far higher and small concentrations of uranium(IV) occur, possibly as a quasistationary equilibrium with free oxygen. The quantum numbers Ω of the excited states are discussed, based on "weak-field" coupling between 2F 1 2 and ω = 3 2 or 1 2 of πu. Detailed viriations of band positions are related to UO bond length modification, also in borate and germanate glasses. The excited uranyl ion may perform energy transfer to lanthanides, conceivably applicable to lasers.

Original languageEnglish
Pages (from-to)259-265
Number of pages7
JournalInorganica Chimica Acta
Volume30
Issue numberC
DOIs
StatePublished - 1978

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