Investigation of neptunium(VI) complexation by SiW11O398- by visible/near infrared spectrophotometry and factor analysis

Structural peculiarities of actinyl complexation with monolacunary polyoxometalates

“…At the same time, value of logβ 1 Np(VI) equal to 3.8 ± 0.2 was found at pH 1 [3], which coincides with the data [2]. Thus, experimental value of logβ 1(abs) Np(VI) [3] is lower by~3.5 orders than the calculated one [2].…”

“…Taking into account an excellent agreement in logβ 1 Np(VI) values reported in papers [2] and [3] for the solutions with pH 1, significant discrepancy between measured and calculated values of "absolute" constant can be explained by the supposition that the Eq. (3) …”

“…Experimental value at pH 1 has been found to be logβ 1 Np(VI) = 3.7, and the value of logβ 1(abs) Np(VI) has been calculated to be 11.6 ± 0.1 [2]. However, experimental value logβ 1(abs) Np(VI) ≈ 8 was obtained in near-neutral solutions [3].…”

“…The structural data are confirmed by electron and IR spectroscopy. 2 ]·25H 2 O were formed in good yield along with a small amount of plate-like crystals of yellow color typical for uranyl compounds, which were embedded into glassy phase of the same color. The X-ray diffraction experiment was carried out on a Bruker KAPPA APEX II diffractometer (MoK α radiation, graphite monochromator) [26].…”

Task‐Specific Ionic Liquids Bearing 2‐Hydroxybenzylamine Units: Synthesis and Americium‐Extraction Studies

“…[25] The other fits were performed by using a Fortran subroutine included in the CERN package "MINUIT", which uses simplex and migrad algorithms for convergence.…”