Selective Anion Recognition by a Dynamic Quadruple Helicate
作者:Peter J. Steel、David A. McMorran
DOI:10.1002/asia.201801262
日期:2019.4.15
An M2L4 quadruplehelicate, formed by wrapping four molecules of 1,4‐bis(3‐pyridyloxy)benzene (L1) about two palladium(II) centers, is shown to bind anions within its internal cavity. 1H NMR exchange experiments provide a quantitative measure of anionselectivity and reveal a preference for ClO4− over the other tetrahedral anions BF4− and ReO4− and the octahedral anion PF6−. X‐ray crystal structures