Incorporation of rare-earth ions in Mg-Al layered double hydroxides: intercalation with an [Eu(EDTA)]{sup -} chelate
- Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education, Beijing University of Chemical Technology (China)
Reaction of an aqueous slurry of an Mg{sub 2}Al-NO{sub 3} layered double hydroxide with a four-fold excess of Na[Eu(EDTA)] gives a material which analyses for Mg{sub 0.68}Al{sub 0.32}(OH){sub 2}[Eu(EDTA)]{sub 0.10}(CO{sub 3}){sub 0.11}.0.66H{sub 2}O. The interlayer spacing of the material is 13.8A, corresponding to a gallery height of 9.0A, which accords with the maximal dimensions (9-10A) of the anion in metal-EDTA complex salts as determined by single crystal X-ray diffraction. Geometrical considerations show that the charge density on the layered double hydroxide layers is too high to be balanced by intercalation of [Eu(EDTA)]{sup -} alone, necessitating the co-intercalation of carbonate ions which have a much higher charge density.
- OSTI ID:
- 20658235
- Journal Information:
- Journal of Solid State Chemistry, Vol. 177, Issue 12; Other Information: DOI: 10.1016/j.jssc.2004.09.005; PII: S0022-4596(04)00499-2; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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