College of Chemistry and Chemical Engineering, Mianyang Normal University, Mianyang 621000, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Oct;96:188-92. doi: 10.1016/j.saa.2012.05.025. Epub 2012 May 22.
Methylene blue (MB) was used as a fluorescent probe to study the encapsulation of three kinds of 1-butyl-3-methylimidazolium ionic liquids in cucurbit[7]uril (CB7) at pH 3. Addition of ionic liquids to the aqueous solution of MB-CB7 inclusion complexes brought about considerable fluorescence intensity quenching, and it was because that MB was extruded from the cavity of CB7 into the aqueous phase by the ionic liquid. NMR and AM1 semi-empirical calculations indicated that the 1-butyl-imidazolium moiety of ionic liquid was responsible for the complexation with CB7.
亚甲蓝（MB）被用作荧光探针，研究三种 1-丁基-3-甲基咪唑鎓离子液体在 pH 3 时在葫芦[7]脲（CB7）中的包合情况。向 MB-CB7 包合物的水溶液中加入离子液体，会导致相当大的荧光强度猝灭，这是因为 MB 被离子液体从 CB7 的腔中挤出到水相中。NMR 和 AM1 半经验计算表明，离子液体的 1-丁基-咪唑鎓部分负责与 CB7 的络合。
