S. Kumar et al., SYNTHETIC IONOPHORES .11. METAL-ION EXTRACTION AND TRANSPORT STUDIES USING NEW SULFUR-CONTAINING PODANDS BASED ON 1,3-DIHYDROBENZIMIDAZOL-2-ONE, Journal of chemical research. Synopses, (11), 1993, pp. 466-467
The podands 5a,b and 6a possessing ethylene spacers show higher extrac
tion and transport selectivities than the structurally less preorganis
ed podands 5c and 6b containing propylene spacers, towards Ag+ over al
kali, alkaline-earth, Tl- and Pb2+ cations.