Complexation of lanthanides, actinides and transition metal cations with a 6-(1,2,4-triazin-3-yl)-2,2′:6′,2′′-terpyridine ligand: implications for actinide(iii)/lanthanide(iii) partitioning
作者:Frank W. Lewis、Laurence M. Harwood、Michael J. Hudson、Michael G. B. Drew、Michal Sypula、Giuseppe Modolo、Daniel Whittaker、Clint A. Sharrad、Vladimira Videva、Véronique Hubscher-Bruder、Françoise Arnaud-Neu
DOI:10.1039/c2dt30522d
日期:——
behavior to related BTBP complexes. In methanol, the stability constants of the Ln(III) complexes are slightly lower than those of the analogous quadridentate bis-triazine BTBP ligands, while the stability constant for the Yb(III) complex is higher. 1H NMR titrations and ESI-MS with lanthanide nitrates showed that the ligand forms only 1 : 1 complexes with Eu(III), Ce(III) and Yb(III), while both 1 : 1 and
四齿N-杂环配体6-(5,5,8,8-四甲基-5,6,7,8-四氢-1,2,4-苯并三嗪-3-基)-2,2':6',合成了2''-吡啶(CyMe 4 -hemi-BTBP),并通过X射线晶体分析Am(III),U(VI),Ln(III)和一些过渡金属阳离子对其相互作用进行了评估。 (III)/ Eu(III)溶剂萃取实验,紫外吸收分光光度法,NMR研究和ESI-MS。与Eu(III),Ce(III)和线性铀酰(UO 2 2+通过X射线晶体学分析获得离子,它们显示出与相关BTBP配合物相似的配位行为。在甲醇,Ln(III)配合物的稳定常数略低于类似四元体的稳定常数双三嗪BTBP配体,而Yb(III)配合物的稳定性常数更高。1 H NMR滴定法和硝酸镧系元素的ESI-MS分析表明,配体仅与Eu(III),Ce(III)和Yb(III)形成1:1的配合物,而与Eu(III),Ce(III)和Yb(III)形成的配合物均为1