Study on the selectivity of anion receptors by adjusting the distance of two urea fragments and their analytical application
作者:Weiwei Huang、Jianwei Li、Hai Lin、Huakuan Lin
DOI:10.1007/s10847-010-9819-z
日期:2011.2
Three anion receptors based on urea: 1 N, N′-bis-(p-nitrophenylaminocarbonyl)-Hydrazine, 2 N, N′-bis-(p-nitrophenylaminocar-bonyl)-ethylenediamine and 3 N, N′-bis-(p-nitrophenylaminocarbonyl)-1, 3-propane-diamine are designed and synthesized. Studies of UV–vis spectra presented that 1 was an excellent sensor of F− and 2 was sensitive to H2PO4 −. Unfortunately, 3 can not distinguish the anions investigated in this paper. The color changes of the hosts upon the addition of a variety of structurally different anions were also utilized as naked-eye detection which is very convenient. It also revealed significantly that the distance between two recognition sites of receptor had an immediate effect on the selectivity of receptor for anions, which had been confirmed by the 1H NMR titration and IR.
基于脲的三种阴离子受体:1 N,N′-双-(对硝基苯基氨基羧基)-肼,2 N,N′-双-(对硝基苯基氨基羧基)-乙二胺和3 N,N′-双-(对硝基苯基氨基羧基)-1,3-丙二胺被设计和合成。UV-Vis光谱研究表明,1是一种优良的F−传感器,2对H2PO4−敏感。不幸的是,3无法区分本文研究的阴离子。随着不同结构阴离子的加入,宿主的颜色变化也被用作肉眼检测,这非常方便。研究还显著揭示出受体两个识别位点之间的距离对受体对阴离子选择性的直接影响,这一观点已通过1H NMR滴定和红外光谱证实。