作者:Junyong Li、Xiaomin Gu、Xiaosheng Yuan、Qiqi Qiu、Jie Sun、Haibo Wang
DOI:10.1007/s10895-016-1807-2
日期:2016.7
A novel method to recognize cis/trans isomers was studied here. The naphthalimide dye as guest could bind with host cucurbit [7]uril (CB [7]) and 1:1 naphthalimide dye ⊂ CB [7] assembly was formed. Moreover, this assembly was used as a fluorescent probe to recognized Fumaric acid (FA) and maleic acid (MA) via fluorescence titration. Two carboxyls in MA are in the same side, they could form stable interaction with the assembly and the fluorescence intensity decreased obviously when naphthalimide dye ⊂ CB [7] was titrated by MA (nearly quenched in 1.5 equiv). But two carboxyls in FA are in opposite sides, the interaction between FA and the assembly was weak and not stable, and the fluorescence intensity changed inconspicuously when the assembly was titrated by FA.
本文研究了一种识别顺式/反式异构体的新方法。作为客体的萘二酰亚胺染料能与宿主葫芦[7]脲(CB[7])结合,并形成1:1的萘二酰亚胺染料 ⊂ CB[7]组装体。此外,这种组装体被用作荧光探针,通过荧光滴定来识别富马酸(FA)和马来酸(MA)。马来酸中的两个羧基位于同一侧,它们能与该组装体形成稳定的相互作用,当萘二甲酰亚胺染料 ⊂ CB[7]被马来酸滴定时,荧光强度明显下降(在1.5当量时几乎被淬灭)。但 FA 中的两个羧基位于相对的两侧,FA 与组装体之间的相互作用较弱且不稳定,用 FA 滴定组装体时荧光强度变化不明显。