Supramolecular Self-Assembly of Cucurbit[6]uil and Ionic Liquid in Non-aqueous System
Xuzhuo Sun
College of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
Search for more papers by this authorBo Li
College of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
Search for more papers by this authorCorresponding Author
Haibo Zhang
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China, Tel.: 0086-027-87218534; Fax: 0086-027-87218534Search for more papers by this authorCorresponding Author
Xiaohai Zhou
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China, Tel.: 0086-027-87218534; Fax: 0086-027-87218534Search for more papers by this authorXuzhuo Sun
College of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
Search for more papers by this authorBo Li
College of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
Search for more papers by this authorCorresponding Author
Haibo Zhang
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China, Tel.: 0086-027-87218534; Fax: 0086-027-87218534Search for more papers by this authorCorresponding Author
Xiaohai Zhou
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China, Tel.: 0086-027-87218534; Fax: 0086-027-87218534Search for more papers by this authorAbstract
A novel [2]pseudorotaxane of cucurbit[6]uril(CB[6]) and 1-butyl-3-methyl-imidazolium bromide ([C4mim]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 [C4mim]Br formed a complex with the ratio 1:1, in which one guest [C4mim]Br was included inside the CB[6], while two other [C4mim]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 [C4mim]Br molecules occupied the pores among the frame of the pseudorotaxanes and formed zigzag lines in the crystal structure. [C4mim]Br can serve as not only the guest reactant but also the solvent in the formation of [2]pseudorotaxane formation.
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