Havel Vaclav, Sindelar Vladimir, Necas Marek, Kaifer Angel E
RECETOX, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic.
Chem Commun (Camb). 2014 Feb 9;50(11):1372-4. doi: 10.1039/c3cc47828a.
A supramolecular complex between benzoates and a bambusuril crystallizes out immediately after mixing in chloroform but only in the presence of residual water molecules. In this complex each of the two portals of the macrocycle is occupied by one benzoate. Carboxylate groups are connected through hydrogen bonding interactions with one molecule of water positioned between them in the center of the bambusuril cavity. Similar water assisted host-guest behavior was also observed when tosylates instead of benzoates were used.
苯甲酸酯与竹节环脲在氯仿中混合后会立即结晶形成超分子复合物，但前提是存在残留水分子。在该复合物中，大环的两个入口各被一个苯甲酸酯占据。羧酸根基团通过氢键相互作用与位于竹节环脲空腔中心、介于它们之间的一个水分子相连。当使用甲苯磺酸酯而非苯甲酸酯时，也观察到了类似的水辅助主客体行为。
