In order to investigate the enantiomeric recognition abilities toward 2 chiral alkylammonium perchlorates (AmI, AmII) by ^1H-NMR titration method in CDCl_3, 4 chiral lariat ethers 8-11 with a (p-methoxyphenoxy) methyl flexible side arm were used. The most effective enantiomeric recognition was obtained by LCEs 9 and 11 toward AmII, by K_R/K_S 6.58 and K_S/K_R 6.63, respectively. The effect of macroring size, subunit of macroring, and side arm appeared to have strong influence on the binding ability of these alkylammonium ions.
为了通过CDCl_3中的^1H-NMR滴定法研究对2种手性烷基
高氯酸铵(AmI、AmII)的对映体识别能力,使用了具有(对
甲氧基苯氧基)甲基柔性侧臂的4种手性套索醚8-11。 LCE 9 和 11 对 AmII 获得了最有效的对映体识别,分别为 K_R/K_S 6.58 和 K_S/K_R 6.63。 大环尺寸、大环亚基和侧臂的影响似乎对这些烷基
铵离子的结合能力有很大影响。