Urea-Functionalized M<sub>4</sub>L<sub>6</sub> Cage Receptors: Anion-Templated Self-Assembly and Selective Guest Exchange in Aqueous Solutions
作者:Radu Custelcean、Peter V. Bonnesen、Nathan C. Duncan、Xiaohua Zhang、Lori A. Watson、Gary Van Berkel、Whitney B. Parson、Benjamin P. Hay
DOI:10.1021/ja300677w
日期:2012.5.23
by EO(4)(n-) oxoanions (n ≥ 2), and upon removal of the templating anion the tetrahedral M(4)L(6) cages rearrange into different coordination assemblies. The exchange selectivity among EO(4)(n-) oxoanions has been investigated with (77)Se NMR spectroscopy using (77)SeO(4)(2-) as an anionic probe, which found the following selectivity trend: PO(4)(3-) ≫ CrO(4)(2-) > SO(4)(2-) > SeO(4)(2-) > MoO(4)(2-)