Sulfate Recognition by Persistent Crystalline Capsules with Rigidified Hydrogen‐Bonding Cavities

作者：Radu Custelcean, Priscilla Remy, Peter V. Bonnesen, De‐en Jiang, Bruce A. Moyer · 发表于：Angewandte Chemie International Edition · 年份：2008 · DOI：10.1002/anie.200704937 · 被引用次数：187 · 研究领域：Molecular Sensors and Ion Detection、Supramolecular Chemistry and Complexes、Crystallography and molecular interactions

Locked up: The sulfate anion is selectively encapsulated into rigid hydrogen-bonded capsules upon crystallization of a simple and flexible urea-functionalized ligand in the presence of Mg2+ ions and water (see structure; sulfate: space-filling). The resulting framework persists in the presence of different-shaped anions, allowing the shape selectivity of hydrogen-bonding hosts to be evaluated, and providing a simple way to separate the environmentally relevant sulfate from highly competitive mixtures of aqueous anions.