Synthesis , structure and photophysical properties of [ UO 2 X 2 ( O v PPh 3 ) 2 ] ( X = Cl , Br , I ) †
نویسندگان
چکیده
The synthesis of a series of uranyl compounds via oxidation of [Li(THF)4][UX5(THF)] (X = Cl, Br, I) in the presence of Ph3PvO is described. The solid state structures of [Li(OvPPh3)(MeCN)2]2[UO2Cl4], [UO2Br2(OvPPh3)2] and [Li(OvPPh3)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(OvPPh3)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.
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