Separation and complexation of palladium(II) with a new soft N-donor ligand 6,6′-bis(5,6-dinonyl-1,2,4-triazin-3-yl)-2,2′-bipyridine (C9-BTBP) in nitric acid medium
Separation and complexation of palladium(II) with a new soft N-donor ligand 6,6′-bis(5,6-dinonyl-1,2,4-triazin-3-yl)-2,2′-bipyridine (C9-BTBP) in nitric acid medium
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DOI：
10.1039/c5nj03082j
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发表时间：
2016-07
影响因子：
3.3
通讯作者：
A. Zhang;Lei Xu;Gaoming Lei
中科院分区：
文献类型：
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作者：
A. Zhang;Lei Xu;Gaoming Lei
在过去的二十年里，用于分离镧系元素和次锕系元素的软氮给体双三嗪配体得到了广泛的研究。然而，关于裂变产物Pd（II）与这些配体的回收和络合的研究至今很少报道。本文介绍了Pd（II）的合成、从硝酸溶液中萃取Pd（II）和一些典型金属以及Pd（II）与新的软氮配体C9-BTBP的络合反应。C9-BTBP配体在硝酸介质中对Pd（II）表现出很高的萃取能力和选择性。通过ESI-MS和1H NMR滴定实验的组合，在溶液中发现了1：1和2：1的Pd（II）-C9-BTBP络合物。合成了一种固体双核钯配合物[Pd 2（NO3）4·（C9-BTBP）]·2.5H2O，并通过元素分析、DSC-TGA和1HNMR进行了表征。这是第一个例子，双核钯（II）配合物与任何N-供体双三嗪配体已被证实在溶液和固体状态。
Soft N-donor bis-triazine ligands developed for the separation of minor actinides (MAs) from lanthanides have been intensively studied for the past two decades. However, the investigation on the recovery and complexation of fission products Pd(II) with these ligands has rarely been reported to date. Herein, the synthesis, and solvent extraction of Pd(II) and some typical metals from HNO3 solutions as well as Pd(II) complexation with a new soft N-donor ligand C9-BTBP were presented. The C9-BTBP ligand exhibited high extraction capability and high selectivity for Pd(II) in HNO3 solution. Both 1 : 1 and 2 : 1 Pd(II)–C9-BTBP complexes were found in solution by a combination of ESI-MS and 1H NMR titration experiments. A solid binuclear Pd(II) complex [Pd2(NO3)4·(C9-BTBP)]·2.5H2O was synthesized and characterized by elemental analysis, DSC-TGA and 1H NMR. This is the first example that a binuclear Pd(II) complex with any N-donor bis-triazine ligand has been confirmed both in solution and in the solid state.