title: Synthesis, structure and photophysical properties of [UO2X2(O=PPh3)2] (X = Cl, Br, I).
abstract: The synthesis of a series of uranyl compounds via oxidation of [Li(THF)4][UX5(THF)] (X = Cl, Br, I) in the presence of Ph3P=O is described. The solid state structures of [Li(O=PPh3)(MeCN)2]2[UO2Cl4], [UO2Br2(O=PPh3)2] and [Li(O=PPh3)4][I3], formed as a by-product from the oxidation of [Li(THF)4][UI5(THF)], is reported. The electronic absorption spectra and photoluminescence spectra of [UO2X2(O=PPh3)2] (X = Cl, Br, I) have been measured and no significant changes in the position of the emission (515-530 nm) or the lifetimes (ca. 1 μs) are observed in this series. However a bathochromic shift is observed in the U-X LMCT band in the electronic absorption spectrum.
authors.affiliation: School of Chemistry, University of Dublin, Trinity College, Dublin 2, Ireland. bakerrj@tcd.ie.
authors.forename: Emtithal
authors.initials: E
authors.lastname: Hashem
authors.forename: Thomas
authors.initials: T
authors.lastname: McCabe
authors.forename: Carola
authors.initials: C
authors.lastname: Schulzke
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Baker
mesh_terms: D001965:Bromides / Q000737:chemistry; D002712:Chlorides / Q000737:chemistry; D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D007454:Iodides / Q000737:chemistry; D008968:Molecular Conformation; D010084:Oxidation-Reduction; D014501:Uranium / Q000737:chemistry*
chemical_list: D001965:Bromides; D002712:Chlorides; D056831:Coordination Complexes; D007454:Iodides; D014501:Uranium