Premium
Supramolecular Self‐Assembly of Cucurbit[6]uil and Ionic Liquid in Non‐aqueous System
Author(s) -
Sun Xuzhuo,
Li Bo,
Zhang Haibo,
Zhou Xiaohai
Publication year - 2015
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201400653
Subject(s) - chemistry , supramolecular chemistry , molecule , crystallography , aqueous solution , bromide , hydrogen bond , crystal structure , solvent , ionic bonding , crystal (programming language) , ionic liquid , supramolecular assembly , self assembly , inorganic chemistry , ion , organic chemistry , catalysis , computer science , programming language
A novel [2]pseudorotaxane of cucurbit[6]uril(CB[6]) and 1‐butyl‐3‐methyl‐imidazolium bromide ([C 4 mim]Br) was synthesized by directly mixing the host and the guest molecules in non‐aqueous system. Structural characterizations of the [2]pseudorotaxane were carried out by 1D, 2D NMR and X‐ray crystallography techniques both in solution and in crystal structure. The crystal structure demonstrated that CB[6] and [C 4 mim]Br formed a complex with the ratio 1:1, in which one guest [C 4 mim]Br was included inside the CB[6], while two other [C 4 mim]Br molecules were free and surrounded the [2]pseudorotaxane as solvent molecules, which could stabilize the crystal structure through hydrogen bonds. Moreover, parallel solvent channels consisting by free [C 4 mim]Br molecules occupied the pores among the frame of the pseudorotaxanes and formed zigzag lines in the crystal structure. [C 4 mim]Br can serve as not only the guest reactant but also the solvent in the formation of [2]pseudorotaxane formation.