EXTRACTION OF CU(II) FROM SULFURIC-ACID BY MACROCYCLE-SYNERGIZED CATION-EXCHANGE - COMPARING A NOVEL IMPREGNATED RESIN WITH ITS SOLVENT-EXTRACTION ANALOG
Ba. Moyer et al., EXTRACTION OF CU(II) FROM SULFURIC-ACID BY MACROCYCLE-SYNERGIZED CATION-EXCHANGE - COMPARING A NOVEL IMPREGNATED RESIN WITH ITS SOLVENT-EXTRACTION ANALOG, Analytical chemistry, 65(23), 1993, pp. 3389-3395
A novel extractive resin employing the tetradentate macrocyclic ionoph
ore tetrathia-14-crown-4 (TT14C4) has been demonstrated via impregnati
on of strong-acid poly(styrene-divinylbenzene) cation-exchange beads.
Following uptake of several weight percent TT14C4, the sulfonic acid r
esin exhibits a 10-100-fold enhancement in the cation-exchange extract
ion of Cu(II) as expressed by the Cu(II) distribution coefficient (D-C
u). Since extraction of Cu(II) by unfunctionalized poly(styrene-diviny
lbenzene) impregnated with TT14C4 was too low to be detectable, the en
hancement in cation exchange may be attributed to a synergistic effect
involving coordination of the Cu(II) by the mobile macrocycle and cat
ion exchange by the immobile sulfonic acid groups. This is the first d
emonstration of synergism in a solvent-impregnated resin involving a f
unctionalized support.