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Intercalation of hydrotalcites with hexacyanoferrate(II) and (III): A thermoRaman spectroscopic study

Frost, Ray L., Musumeci, Anthony W., Bouzaid, Jocelyne, Adebajo, Moses O., Martens, Wayde N., & Kloprogge, J. Theo (2005) Intercalation of hydrotalcites with hexacyanoferrate(II) and (III): A thermoRaman spectroscopic study. Journal of Solid State Chemistry, 178(6), pp. 1940-1948.

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Abstract

Raman spectroscopy using a hot stage indicates that the intercalation of hexacyanoferrate(II) and (III) in the interlayer space of a Mg,Al hydrotalcites leads to layered solids where the intercalated species is both hexacyanoferrate(II) and (III). Raman spectroscopy shows that depending on the oxidation state of the initial hexacyanoferrate partial oxidation and reduction takes place upon intercalation. For the hexacyanoferrate(III) some partial reduction occurs during synthesis. The symmetry of the hexacyanoferrate decreases from Oh existing for the free anions to D3d in the hexacyanoferrate interlayered hydrotalcite complexes.
Hot stage Raman spectroscopy reveals the oxidation of the hexacyanoferrate(II) to hexacyanoferrate(III) in the hydrotalcite interlayer with the removal of the cyanide anions above 250 °C. Thermal treatment causes the loss of CN ions through the observation of a band at 2080 cm-1. The hexacyanoferrate (III) interlayered Mg,Al hydrotalcites decomposes above 150 °C.

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ID Code: 3555
Item Type: Journal Article
Keywords: hydrotalcite, brucite, Raman microscopy, hexacyanoferrate(III), potassium hexacyanoferrate(II)
DOI: 10.1016/j.jssc.2005.03.045
ISSN: 0022-4596
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2005 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 17 Feb 2006
Last Modified: 29 Feb 2012 23:15

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