Twisted Cucurbituril (pages 7252–7255)
Xiao-Jie Cheng, Li-Li Liang, Kai Chen, Ning-Ning Ji, Prof. Xin Xiao, Prof. Jian-Xin Zhang, Prof. Yun-Qian Zhang, Prof. Sai-Feng Xue, Prof. Dr. Qian-Jiang Zhu, Dr. Xin-Long Ni and Prof. Dr. Zhu Tao
Article first published online: 28 MAY 2013 | DOI: 10.1002/anie.201210267
All in a twist: The largest cucurbit[n]uril, namely tQ (see picture; colors indicate sides of the molecule) contains 14 normal glycoluril units linked by 28 methylene bridges. However, it contains a 360° twist. As a consequence, it does not have a normal cavity like the most cucurbit[n]urils, and instead has a folded, figure-of-eight conformation.