ZIRCONIUM POLYIMINE PHOSPHONATES, A NEW CLASS OF REMARKABLE COMPLEXING AGENTS

Citation
Cy. Ortizavila et al., ZIRCONIUM POLYIMINE PHOSPHONATES, A NEW CLASS OF REMARKABLE COMPLEXING AGENTS, Inorganic chemistry, 33(12), 1994, pp. 2499-2500
Citations number
6
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
ISSN journal
00201669
Volume
33
Issue
12
Year of publication
1994
Pages
2499 - 2500
Database
ISI
SICI code
0020-1669(1994)33:12<2499:ZPPANC>2.0.ZU;2-K
Abstract
Two types of layered zirconium polyimines have been synthesized. Monop hosphonic acid head groups attached to polyimine chains form layered c ompounds with Zr-(IV) salts in which the Polyimine chains form bilayer s in the interlamellar space. Upon protonation, the layers disperse, f orming colloidal solutions. These free-floating polyimines readily enc apsulate large polyvalent anions, accompanied by quantitative precipit ation. Diphosphonic acids cross-link the layers and behave as insolubl e anion exchangers in acid solution and as cryptates in neutral or alk aline media.