Selective M/sup +/-H/sup +/ coupled transport of cations through a liquid membrane by macrocyclic calixarene ligands

Journal Article · Wed Apr 06 00:00:00 EST 1983 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00345a016· OSTI ID:5684941

Izatt, R M; Lamb, J D; Hawkins, R T; Brown, P R; Izatt, S R; Christensen, J J

Macrocylic p-tert-butylcalix(4)arene, -calix(6)arene, and -calix(8)arene have been studied as cation carriers in H/sub 2/O-(organic solvent)-H/sub 2/O liquid membranes. When the source water phase is a solution of the metal nitrate salt, no cation transport through the membrane CCHCl/sub 3/) is observed with these ligands in contrast to measurable transport when the macrocyclic carrier, 18-crown-6, is present. However, if the source phase is a solution of the metal hydroxide, transport of cations is observed with calixarenes but not with 18-crown-6 in the membrane (25% v/v CH/sub 2/Cl/sub 2/-CCl/sub 4/). Transport by the calixarenes is selective for Cs/sup +/ over other alkali metal cations with the selectivity increasing in the order (8) < (6) < (4). Preliminary work with p-tert-pentylcalix(4)arene and -calix(8)arene shows transport behavior to be similar to that of the corresponding p-tert-butylcalixarenes. These calixarene ligands offer several features desirable to membrane carriers: (1) low water solubility, (2) formation of neutral complexes with cations through loss of a proton, and (3) the potential for coupling cation transport to the reverse flux of protons.

• Research Organization: Brigham Young Univ., Provo, UT
• DOE Contract Number: AC02-78ER05016
• OSTI ID: 5684941
• Journal Information: J. Am. Chem. Soc.; (United States), Vol. 105:7
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CATIONS
MEMBRANE TRANSPORT
LIGANDS
CESIUM
HYDROXIDES
MEMBRANES
NITRATES
PROTONS
ALKALI METALS
BARYONS
CHARGED PARTICLES
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
HADRONS
HYDROGEN COMPOUNDS
IONS
METALS
NITROGEN COMPOUNDS
NUCLEONS
OXYGEN COMPOUNDS
400105* - Separation Procedures