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Empirical method for prediction of the coordination environment of Eu(III) by time-resolved laser-induced fluorescence spectroscopy

“…It is considered that the R E/M -∆N H2O plots distributed in the intermediate area between areas A and B result from a mixture of inner-spherical and outer-spherical coordination. This is in good accordance with the literature in which the coordination environment of Eu(III) adsorbed on ion-exchange resin was concluded to be that stabilized by both inner-spherical and outer-spherical coordination [23]. Figure 5 shows the CE diagram for Eu(III) adsorbed on B. subtilis and H. salinarum.…”

“…The pH of the solution was adjusted to an appropriate pH between 2 and 11 at which Eu(III) and the chelating reagent form a 1:1 complex [9]. The sample of Eu(III) adsorbed on the cation-exchange resin (AG 50W× 8) was prepared by mixing the resin with 1×10 -3 mol L -1 Eu(III) solution in 0.1-11 mol L -1 HCl (0% v/v MeOH), in 0.1-8 mol L -1 HCl (30% v/v MeOH), in and 0.1-4 mol L -1 HCl (60% v/v MeOH), until adsorption equilibrium was achieved [10]. The sample of Eu(III) adsorbed by microorganisms was prepared by incubating microorganisms (Bacillus subtilis [11,12] and Halobacterium salinarum [13,14]) in 1×10 -3 mol L -1 Eu(III) solution.…”

Curium(III) species and the coordination states in concentrated LiCl-aqueous solutions studied by time-resolved laser-induced fluorescence spectroscopy

“…Details on the experimental set-up were described previously [13]. Curium(III) in the samples was excited by a pulsed laser beam of 397 nm wavelength (5 Hz).…”

“…On the other hand, it is well known that the luminescence properties of Am(III) and Cm(III), as well as several Ln(III), are sensitive to the species and the coordination states of An(III) at the inner-sphere. Therefore, luminescence techniques have become important tools for studying the species and the coordination states of An(III) not only dissolved in an aqueous solution [6][7][8][9][10][11] but also sorbed on such solid-liquid interface as ion exchange resin [12][13][14].…”

Luminescence Analysis of Actinides: Instrumentation, Applications, Quantification, Future Trends, and Quality Assurance

“…The only statement found was by Yusov [2], that the relative luminescence intensity decreases in the order Cm 3+ >Es 3+ >Bk 3+ >Am 3+ >Cf 3+ . In the nuclear field, TRLIFS data are mainly used in order to derive equilibrium constants [13,[96][97][98][99]. In order to do so, either lifetime values and/or emission spectra and their variation with a given parameter (such as ligand concentration, ionic strength etc.)…”