Thermodynamic constant of MgUO2(CO3)32- complex in NaClO4 and NaCl media using time-resolved luminescence spectroscopy, and applications to different geochemical contexts.

2021 ◽  
Author(s):  
Chengming Shang ◽  
Pascal Reiller
Keyword(s):  
Formation Constants ◽  
Luminescence Spectroscopy ◽  
Interaction Coefficients ◽  
Time Resolved ◽  
Thermodynamic Constant

The formation constants and specific ion interaction coefficients of MgUO2(CO3)32 complex were determined in 0.1 to 1 mol kgw-1 NaCl and 0.1 to 2.21 mol kgw-1 NaClO4 media in the...

scholarly journals Determination of formation constants and specific ion interaction coefficients for CanUO2(CO3)3(4−2n)− complexes in NaCl solution by time-resolved laser-induced luminescence spectroscopy

2020 ◽  
Vol 49 (2) ◽  
pp. 466-481 ◽  
Author(s):  
Chengming Shang ◽  
Pascal E. Reiller
Keyword(s):  
Formation Constants ◽  
Luminescence Spectroscopy ◽  
Nacl Solution ◽  
Interaction Coefficients ◽  
Time Resolved

The formation constants of CaUO2(CO3)32− and Ca2UO2(CO3)3(aq) were determined in NaCl medium at ionic strengths between 0.1 and 1 mol kgw−1 using time-resolved laser-induced luminescence spectroscopy (TRLS).

Techniques in Time-Resolved Luminescence Spectroscopy

1984 ◽  
pp. 393-407 ◽  
Author(s):  
D.L. ROSEN ◽  
A.G. DOUKAS ◽  
A. KATZ ◽  
Y. BUDANSKY ◽  
R.R. ALFANO
Keyword(s):  
Luminescence Spectroscopy ◽  
Time Resolved

scholarly journals Luminescence of uranium(VI) after liquid-liquid extraction from HCl by Aliquat® 336 in n-dodecane:1-decanol by time-resolved laser-induced luminescence spectroscopy

2020 ◽  
Vol 108 (7) ◽  
pp. 527-533 ◽  
Author(s):  
Pascal E. Reiller ◽  
Clarisse Mariet
Keyword(s):  
Organic Phase ◽  
Decay Time ◽  
Specific Interaction ◽  
Intensity Variation ◽  
Pitzer Model ◽  
Luminescence Spectroscopy ◽  
Luminescence Spectra ◽  
Time Resolved ◽  
Crystal Field Effect ◽  
Hcl Concentration

AbstractTo investigate the extraction of uranium(VI) in HCl media by Aliquat® 336 in 1:99 (v:v) 1-decanol:n-dodecane mixture, our objective is to identify the complexe(s) in the organic phase by time-resolved laser-induced luminescence spectroscopy (TRLS). The extraction mechanism is supposed to involve the formation of $[U{O_2}Cl_4^{2 - } \cdot {({R_4}{N^ + })_2}]$ in the organic phase. The occurrence of such a species leads to the presence of the ${\rm{U}}{{\rm{O}}_2}{\rm{Cl}}_4^{2 - }$ species in the organic solution, which luminescence shows particular features. The luminescence spectra and decay time evolutions are obtained in the organic phase as a function of HCl concentration in the aqueous phase (0.5–6 M). The extraction of ${\rm{U}}{{\rm{O}}_2}{\rm{Cl}}_4^{2 - }$ is confirmed by the particular spectrum of uranium(VI) in the organic phase, and the typical splitting of the luminescence bands, due to the crystal field effect, is clearly evidenced. The stoichiometry is verified using luminescence intensity variation as a function of the activity of Cl−, and extraction constants are calculated both using the specific interaction theory and Pitzer model. A decomposition of the spectrum of the extracted complex in the organic phase is also proposed. The decay time variation as a function of temperature allows estimating the activation energy of the luminescence process of the extracted complex.

A time-resolved luminescence spectroscopy study of non-linear optical crystals K2Al2B2O7

2012 ◽  
Vol 132 (7) ◽  
pp. 1632-1638 ◽  
Author(s):  
I.N. Ogorodnikov ◽  
V.A. Pustovarov ◽  
S.A. Yakovlev ◽  
L.I. Isaenko ◽  
S.A. Zhurkov
Keyword(s):  
Luminescence Spectroscopy ◽  
Spectroscopy Study ◽  
Time Resolved ◽  
Optical Crystals ◽  
Non Linear ◽  
Linear Optical
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