Authors: MEHMET ZAFER KÖYLÜ, TARIK ARAL, MEHMET KARAKAPLAN, ŞAFAK ÖZHAN KOCAKAYA, HALİL HOŞGÖREN
Abstract: 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.
Keywords: Chiral lariat crown ethers, enantioselectivity, complexation properties, molecular recognition, NMR titration
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