期刊
JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY
卷 71, 期 3-4, 页码 537-543出版社
SPRINGER
DOI: 10.1007/s10847-011-9944-3
关键词
Calix[4]azacrowns; Amino acid native and methylesters; Extraction; Membrane transport; Separation
The native and methyl ester amino acids have been extracted by calix[4]azacrowns 1 (1,3-[ethylene-bis-aminocarbonylmethoxy)]-p-tert-butylcalix[4]arene) and 2 (1,3-[propylene-bis-aminocarbonylmethoxy)]-p-tert-butylcalix[4]arene) from an aqueous phase into a chloroform phase and transported through a chloroform liquid membrane as ion pairs in the presence of picrate or tropaeolin 00 as counter ions aiming their separation. The amino acids under study exhibited good extractability by calix[4]azacrowns 1 and 2. Both receptors 1 and 2 showed good extractability towards amino acids under study. The results are discussed in term of correlation of structural properties of amino acids and calix[4]azacrowns involved in experiments. In this respect, the influence of chain length of receptors upon extraction and transport of amino acids, and the nature of anions used as counter ions are evaluated.
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