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Liquid-liquid extraction of manganese(II), copper(II) and zinc(II) with acyclic and macrocyclic Schiff bases containing bisphenol A subunits

✍ Scribed by Shigeki Abe; Kazuhito Fujii; Tyo Sono

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
566 KB
Volume
293
Category
Article
ISSN
0003-2670

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✦ Synopsis

Acyclic and macrocyclic Schiff bases containing bisphenol A subunits were synthesized and the effect of ligand atoms on the liquid-liquid extraction of manganese(II), copper(U) and zinc011 was studied. The phenol groups in the Schiff base moiety led to a large increase in the percent extraction of transition metal ions. The substitution of methoxy groups for phenolic OH ligands resulted in a marked decrease in the extractability of metal ions. Compared with a macrocyclic Schiff base, the corresponding acyclic counterpart was found to have a reasonable reactivity toward metal ions and a better solubility in organic solvents. The copper(H) complexes with acyclic Schiff bases were quantitatively extracted into nitrobenz.ene without the presence of bulky counter anions. Mutual separation of &&I), copper(H) and manganese(I1) can be achieved by a proper selection of pH and extractant.

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