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Cation Transport at 25°C from Binary Cd 2+ –M n + Mixtures in a H 2 O‐CHCl 3 –H 2 O Liquid Membrane System Containing a Series of Macrocyclic Carriers[1]
Author(s) -
Izatt Reed M.,
Izatt Steven R.,
Mcbride Don W.,
Bradshaw Jerald S.,
Christensen James J.
Publication year - 1985
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.198500005
Subject(s) - chemistry , alkali metal , metal , crystallography , ligand (biochemistry) , substituent , selectivity , salt (chemistry) , inorganic chemistry , alkaline earth metal , ion , stereochemistry , analytical chemistry (journal) , organic chemistry , biochemistry , receptor , catalysis
Macrocycle‐mediated fluxes of Cd(NO 3 ) 2 and of several binary mixtures of Cd(NO 3 ) 2 with the nitrate salt of either Na + , K + , Rb + Cs + , Ag + , Ca 2+ , Sr 2+ , Pb 2+ , Zn 2+ , or Cu 2+ have been determined in a H 2 O‐CHCl 3 –H 2 O liquid membrane system. Of the macrocycles studied, 2.2 and 2.2DD most successfully transported Cd 2+ In the Cd 2+ –M n + mixtures, Cd 2+ was transported selectively with 2.2 when M n + was either an alkali or an alkaline earth cation. However, when M n + was either Ag + , Pb 2+ , or Cu 2+ the Cd 2+ flux was reduced sharply. Generally, cation flux was greater for 2.2DD than for 2.2 with selectivity for Cd 2+ being altered also in several cases. Relative fluxes from binary cation mixtures depend on metal cation radius, macrocycle cavity diameter, ligand ring substituent and log K for metal ion‐macrocycle interaction.