Adducts of aqua complexes of Ln(3+) with ortho-tetramethyl substituted cucurbituril: Potential applications for isolation of heavier lanthanides

作者：Yu, Xin; Clegg, Jack K.; Zhang, Yun-Qian; Xue, Sai-Feng; Tao, Zhu; Zhu, Qian-Jiang^*; Lindoy, Leonard F.; Wei, Gang

来源：Polyhedron, 2015, 91: 150-154.

DOI：10.1016/j.poly.2015.02.032

• Cucurbituril
• o-Tetramethyl substituted cucurbituril
• Lanthanide aqua complexes
• Adducts
• Isolation

The supramolecular assemblies formed from lanthanide cations (Ln(3+)) and a new alkyl-substituted cucurbituril, the ortho-tetramethyl substituted cucurbituril (o-TMeQ[6]), in neutral solution were investigated. X-ray single crystal diffraction analysis revealed that interactions of the aqua complexes of lanthanide cations with o-TMeQ[6] gives rise to an isomorphous group of compounds when heavy lanthanide cations such as Tb3+, Dy3+, Ho3+, Er3+, Tm3+, Yb3+ and Lu3+ are employed. Interestingly, no solid crystals were obtained from o-TMeQ[6]-Ln(3+) systems of La, Ce, Pr, Nd, Sm, Eu or Gd, suggesting that these interactions could be used for the isolation of heavier lanthanide cations from their lighter counterparts.

• 出版日期2015-5-8
• 单位贵州大学; CSIRO