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Recognition of glycine by cucurbit[5]uril and cucurbit[6]uril:A comparative study of exo-and endo-binding
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作者 Peihui Shan Ruilian Lin +3 位作者 Ming Liu Zhu Tao Xin Xiao Jingxin Liu 《Chinese Chemical Letters》 SCIE CAS CSCD 2021年第7期2301-2304,共4页
Recognition features of glycine(Gly)with cucurbit[5]uril(Q[5])and cucurbit[6]uril(Q[6])both in aqueous solution and solid state were investigated by 1 H NMR spectroscopy and X-ray crystallography.1 H NMR data indicate... Recognition features of glycine(Gly)with cucurbit[5]uril(Q[5])and cucurbit[6]uril(Q[6])both in aqueous solution and solid state were investigated by 1 H NMR spectroscopy and X-ray crystallography.1 H NMR data indicate that the Gly is located outside of the portals of the Q[5],exhibiting exo binding with the Q[5].In the case of the Q[6],the Gly shows endo binding or a dual binding mode(endo and exo binding)with the host,which depends on the amount of the host in the aqueous solution.X-ray crystallography clearly display that the Gly forms 2:1 exclusion complex with the Q[5],and 2:1 inclusion complex with the Q[6].Interestingly,hydrogen bondings between the encapsulated Gly molecules in the Q[6]were observed. 展开更多
关键词 CUCURBITURIL endo-Binding exo-binding Selective recognition Supramolecular assembly
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