Recognition of glycine by cucurbit[5]uril and cucurbit[6]uril: A comparative study of exo- and endo-binding

被引：11
作者：
Shan, Peihui [1 ]
Lin, Ruilian [2 ]
Liu, Ming [1 ]
Tao, Zhu [1 ]
Xiao, Xin [1 ]
Liu, Jingxin [2 ]
机构：
[1] Guizhou Univ, Key Lab Macrocycl & Supramol Chem Guizhou Prov, Guiyang 550025, Guizhou, Peoples R China
[2] Anhui Univ Technol, Coll Chem & Chem Engn, Maanshan 243002, Peoples R China
来源：
CHINESE CHEMICAL LETTERS | 2021年 / 32卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Cucurbituril; endo-Binding; exo-Binding; Selective recognition; Supramolecular assembly; BASIC-AMINO-ACIDS; HIGH-ENERGY WATER; MOLECULAR RECOGNITION; SUPRAMOLECULAR ASSEMBLIES; FLUORESCENT DYE; SELECTIVE RECOGNITION; ENZYME ASSAYS; SENSOR ARRAY; COMPLEXES; INCLUSION;
D O I：
10.1016/j.cclet.2021.02.020
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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 H-1 NMR spectroscopy and X-ray crystallography. H-1 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. (C) 2021 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：2301 / 2304
页数：4
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