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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Complexation of Cm(iii) with 6-(5,6-dipentyl-1,2,4-triazin-3-yl)-2, 2′-bipyridine studied by time resolved laser fluorescence spectroscopy
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Complexation of Cm(iii) with 6-(5,6-dipentyl-1,2,4-triazin-3-yl)-2, 2′-bipyridine studied by time resolved laser fluorescence spectroscopy

机译：时间分辨激光荧光光谱法研究Cm（iii）与6-（5,6-二戊基-1,2,4-三嗪-3-基）-2，2'-联吡啶的络合

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摘要

The complexation of Cm(iii) with 6-(5,6-dipentyl-1,2,4-triazin-3-yl)-2, 2′-bipyridine (C _5-hemi-BTP) in a water-2-propanol solution is investigated by TRLFS. Upon increasing the concentration of C _5-hemi-BTP in the Cm(iii)-solution, three different species, the 1:1-, 1:2- and 1:3-complex, with emission bands at 599.9 nm, 607.3 nm, and 612.8 nm, respectively, are found. Hereby, slow complexation kinetics is observed which no other BTP-type ligand has shown up to now. The species distributions for various ligand concentrations are determined and stability constants are derived (log β _(03) = 12.1 ± 0.1). As extraction with hemi-BTP ligands is only possible in the presence of a lipophilic anion, the complexation of Cm(iii) with C _5-hemi-BTP and 2-bromohexanoic acid is investigated to deduce the species formed in the extraction process. It is found that Cm(iii) is coordinated by two C _5-hemi-BTP ligands and one 2-bromohexanoate ligand. This species formed in aqueous solution is identical to the one from the extraction process.
机译：Cm（iii）与6-（5,6-二戊基-1,2,4-三嗪-3-基）-2，2'-联吡啶（C _5-hemi-BTP）在水2中的络合丙醇溶液由TRLFS研究。增加Cm（iii）溶液中C _5-hemi-BTP的浓度后，三种不同的物质1：1-，1：2-和1：3-络合物的发射带在599.9 nm，607.3 nm发现分别为和612.8 nm。因此，观察到缓慢的络合动力学，到目前为止没有其他BTP型配体显示出来。确定了各种配体浓度的物种分布，并得出了稳定性常数（logβ_（03）= 12.1±0.1）。由于仅在存在亲脂性阴离子的情况下才可以用半BTP配体进行萃取，因此研究了Cm（iii）与C -5-hemi-BTP和2-溴己酸的络合作用，以推断在萃取过程中形成的物质。发现Cm（iii）由两个C -5-hemi-BTP配体和一个2-溴己酸酯配体配位。在水溶液中形成的这种物质与提取过程中的相同。

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