Speciation of Aquatic Actinide Ions by Pulsed Laser Spectroscopy

A Time-Resolved Laser Fluorescence Spectroscopy (TRLFS) Study of the Interaction of Trivalent Actinides (Cm(III)) with Calcite

“…Details on the experimental setup are given elsewhere (17)(18)(19)(20)(21)(22). The system consists of a polychromator (Chromex 250) with a 1200 lines/mm grating.…”

Influence of the solvent on the complexation of Cm(iii) and Eu(iii) with nPr–BTP studied by time-resolved laser fluorescence spectroscopy

“…The spectrum is shifted 0.5 nm bathochromically compared to the Cm(III) aquo ion [Cm(H 2 O) 9 ] 3+ , the emission band of which is located at 593.8 nm. 25 This shift can be explained by a partial replacement of water molecules in the inner coordination sphere of the Cm(III) ion by methanol molecules. As alcohol molecules cause a larger ligand field splitting than water, the substitution of water molecules is reflected in shifts of the emission spectra to higher wavelength.…”

“…[24][25][26] Information on the number and type of ligands as well as information on the complex geometry are provided by spectroscopic parameters like the position, shape and intensity of the emission bands. TRLFS has already been successfully used to study the coordination chemistry of Cm(III) and Eu (III) with BTP-and BTBP-type ligands in aqueous [14][15][16]27 and organic solutions.…”

A TRLFS Study on the Complexation of CmIII and EuIII with 2,6‐Bis(5,6‐dipropyl‐1,2,4‐triazin‐3‐yl)pyridine in Water/Methanol Mixture

“…Except for a small bathochromic shift, the fluorescence spectrum is comparable to that of the aquo ion (with 9 H 2 O in the inner coordination sphere), exhibiting a fluorescence maximum at 593.7 nm. [25] Differences in the inner coordination sphere are also expressed in a slightly longer fluorescence lifetime of 71 µs (compared to 65 µs of the aquo complex [25] ) and are due to the coordination of methanol instead of water. [26] Inner sphere nitrate coordination is not expected under these conditions.…”