Chiral macrocycles,part II: Transport of amino acid Li+ salts

Complexation of amino acids in both their zwitterionic and Li⁺ salt forms by macrocycles, and carrier-mediated transport of the Li⁺ salts through a CH₂Cl₂ membrane have been investigated: the transport study of four amino acids by a new series of tetrapyrazolic macrocycles with functionalized sidearms shows wide variations of the transport rates depending on both the macrocyclic sidearm and the amino acid structure.