Octalanthanide Wheels Supported by p-tert-Butylsulfonylcalix[4]arene

摘要

Based on a bottom-up approach, functionalized and structurally unique metal clusters with high nuclearity have been synthesized. Wheel-shaped clusters are one of the most highly symmetric architectures, which often consist of first-row transition-metal ions. Lanthanide complexes have attracted considerable attention due to their practical properties. However, multi-lanthanide complexes are rather rare.[2f, 4] Thus our goal was to develop a new and rational synthetic method to realize lanthanide cluster complexes. As a cluster-forming ligand, we employed a sulfonylcalix[4]arene (H_4L) (Scheme 1).