tethered, urea-substituted calix[4]arene dimer (shown schematically): formation of unimolecular capsules (far left), dimers, or oligomers. By combination of NMR spectroscopy and electrospray mass spectrometry, a hexamethylene spacer was shown to be exactly right to permit the preferential formation of a unimolecular capsule under inclusion of solvent or other guest molecules.
组装束缚的,
尿素取代的杯[4]
芳烃二聚体的两半有多种方法(示意性显示):单分子胶囊的形成(最左侧),二聚体或低聚物。通过结合NMR光谱和电喷雾质谱,已证明六亚甲基间隔基是正确的,允许在包含溶剂或其他客体分子的情况下优先形成单分子胶囊。