Formation of Cm(III) chloride complexes in CaCl2 solutions
Formation of Cm(III) chloride complexes in CaCl2 solutions
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CaCl2 溶液中 Cm(III) 氯化物络合物的形成
DOI：
10.1016/0925-8388(94)07131-4
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Y. Kato
中科院分区：
文献类型：
--
作者：
T. Fanghänel;Jae;R. Klenze;Y. Kato
在25 °C下，用时间分辨激光荧光光谱法研究了痕量的氯化物络合反应。在酸性pH下，用CaCl2将氯离子浓度从0变化到约20 mol kg−1H2O。通过峰去卷积从荧光发射光谱中定量Cm物质Cm3+、CmCl2+和CmCl2+，并在每个给定的CaCl2摩尔浓度下评估氯络合常数β 1和β 2。实验证实，在低Cl−浓度（低于3 mol kg−1H2O）下，氯化物络合作用不太重要（形成的氯化物络合物少于5%），因此在中等浓度的盐水中可以忽略。
The chloride complexation of curium(III) in trace amounts at very high chloride ion concentrations was studied by time-resolved laser fluorescence spectroscopy at 25 °C. The chloride ion concentration was varied from 0 to about 20 mol kg−1H2O with CaCl2at acidic pH. The Cm species Cm3+, CmCl2+and CmCl2+were quantified spectroscopically from the fluorescence emission spectra by peak deconvolution and the chloride complexation constants β1and β2were evaluated at each given CaCl2molality. The experiment verifies that at low Cl−concentrations (below 3 mol kg−1H2O) the chloride complexation is less important (less than 5% of chloride complexes are formed) and hence it can be neglected in moderately concentrated brines.