Luminescence quenching of UO2(NO3)2·2TBP in supercritical fluid CO2
Abstract
The luminescence quenching of UO2(NO3)·2TBP in supercritical fluid (ScF) CO2 has been examined with time resolved laser induced fluorescence (TRLIF). Quenching mechanisms for the uranyl complex with respect to ScF composition, pressure and temperature have been identified. A description of pressure quenching in ScF has been shown to require both the bimolecular collisional dynamics associated with a gas phase as well as the viscosity effects expected from a liquid phase.