A Study of Hydrolysis Reaction of Curium(III) by Time Resolved Laser Fluorescence Spectroscopy

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

“…The unusual extraordinary red shift of the fluorescence emission of the second Cm/calcite complex with a peak maximum at 618.0 nm indicates a considerable large change of the ligand field of the actinide ion, which could be caused by a change in the coordination number of Cm(III). (24)(25)(26)(27), while in D 2 O the lifetime is increased to 1250 ± 80 µs (28), which is close to the above calculated radiative lifetime. There exists a linear correlation between the decay rate and the number of H 2 O molecules in the first coordination shell of Cm(III) complexes (16).…”

“…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.…”

Structural incorporation of Cm(III) in trioctahedral smectite hectorite: A time-resolved laser fluorescence spectroscopy (TRLFS) study

“…The Cm(III) fluorescence lifetime seems to be only slightly affected by hydrolysis at higher pH values, whereas a red shift to 598.8 nm (CmOH 2+ ) and 603.5 nm ðCmðOHÞ 2 þ Þ occurs (Wimmer et al, 1992;Fanghänel et al, 1994).…”

Observation of aqueous Cm(III)/Eu(III) and UO22+ nanoparticulates at concentrations approaching solubility limit by laser-induced fluorescence spectroscopy

“…1) in acidic solutions (pH < 5) upon excitation in the UV range (375 nm) [12,16,17]. Increasing the pH to the neutral and basic range causes a sharp drop of the fluorescence intensity and a gradual shift of the spectral maximum towards longer wavelength due to hydrolysis and the subsequent fluorescence quenching by the −OH group(s) [12,18]. Addition of organic chelating ligand (e.g., HEDTA) results in the formation of stoichiometric Cm(III)-ligand complexes [8][9][10][11] and/or the mixed metal-ligand-hydroxide complexes [12].…”