Solvent extraction of americium(III) and europium(III) with tridentate N,N-dialkyl-1,10-phenanthroline-2-amide-derived ligands: extraction, complexation and theoretical study

doi:10.1039/c6nj02696f

	Solvent extraction of americium(III) and europium(III) with tridentate N,N-dialkyl-1,10-phenanthroline-2-amide-derived ligands: extraction, complexation and theoretical study
	Tan, Cunmin 1,2,4; Cao, Shiwei 2,4; Wang, Jieru 4; Zhang, Xin 1; Li, Sa 1,2,4; Tian, Wei2,4 ; Guo, Hangxu 2,4; Wang, Lei 3; Qin, Zhi4
刊名	NEW JOURNAL OF CHEMISTRY
	2016-12-01
卷号	40 页码:10560-10568
ISSN号	1144-0546
DOI	10.1039/c6nj02696f
英文摘要	The extraction and complexation behavior of soft hard combined N,N-dialkyl-1,10-phenanthroline-2-amide (PTA) ligands with Am(III) and Eu(III) in HNO3 solution was investigated. The effects of acidity of the aqueous solution, shaking time, concentration of the extractant and temperature on the distribution ratios were studied. The extraction ability for both Am(III) and Eu(III) was found to decrease with an increase in the length of the substituent alkyl chains, and the highest extractability and selectivity for Am(III) over Eu(III) were found for the diethyl-substituted ligand. The separation factor for Am(III) over Eu(III) reached around 7.6 at low acidity and high salinity. UV-vis titrations revealed that the dialkyl-substituted tridentate PTAs all predominantly formed 1:1 complexes with Eu(III), which agreed well with the results of slope analyses in the extraction experiments. The stability constants (K-EuL) as well as the protonation constants (K-H) were also determined by UV-vis titration. Computational chemistry gave a good explanation of the relationship between the alkalinity and the protonation energy of the proposed PTA ligands. Density functional theory (DFT) calculations on the optimized structures of Am(III) and Eu(III) complexes with C2-PTA showed that the selectivity may originate from differences in the degree of covalency of the bonds between the metal ions and the donor N atoms, which fits well with the experimental results.
资助项目	National Natural Science Foundation of China[11079006] ; CAS Strategic Priority Research Program[XDA03010402]
WOS关键词	SEPARATION ; ACTINIDE ; LANTHANIDES ; CHEMISTRY ; EU(III) ; AM(III) ; ENERGY ; PSEUDOPOTENTIALS ; DIGLYCOLAMIDES ; SELECTIVITY
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000390724600084
资助机构	National Natural Science Foundation of China ; CAS Strategic Priority Research Program
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/44004]
专题	近代物理研究所_实验物理中心
通讯作者	Qin, Zhi
作者单位	1.Lanzhou Univ, Sch Nucl Sci & Technol, 222 Tianshuinan Rd, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Sch Phys Sci & Technol, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Sichuan Univ, Coll Chem, 24 South Sect 1,Yihuan Rd, Chengdu 610065, Peoples R China 4.Chinese Acad Sci, Inst Modern Phys, 509 Nanchang Rd, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Tan, Cunmin,Cao, Shiwei,Wang, Jieru,et al. Solvent extraction of americium(III) and europium(III) with tridentate N,N-dialkyl-1,10-phenanthroline-2-amide-derived ligands: extraction, complexation and theoretical study[J]. NEW JOURNAL OF CHEMISTRY,2016,40:10560-10568.
APA	Tan, Cunmin.,Cao, Shiwei.,Wang, Jieru.,Zhang, Xin.,Li, Sa.,...&Qin, Zhi.(2016).Solvent extraction of americium(III) and europium(III) with tridentate N,N-dialkyl-1,10-phenanthroline-2-amide-derived ligands: extraction, complexation and theoretical study.NEW JOURNAL OF CHEMISTRY,40,10560-10568.
MLA	Tan, Cunmin,et al."Solvent extraction of americium(III) and europium(III) with tridentate N,N-dialkyl-1,10-phenanthroline-2-amide-derived ligands: extraction, complexation and theoretical study".NEW JOURNAL OF CHEMISTRY 40(2016):10560-10568.