FT-Raman and FT-IR spectroscopic study of the local structure of synthetic Mg/Zn/Al-hydrotalcites

Kloprogge, J. Theo, Frost, Ray L., & Hickey, Leisel (2004) FT-Raman and FT-IR spectroscopic study of the local structure of synthetic Mg/Zn/Al-hydrotalcites. Journal of Raman Spectroscopy, 35, pp. 967-974.

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Synthetic Mg/Zn/Al-hydrotalcites with atomic ratios of 6:0:2, 4:2:2, 2:4:2 and 0:6:2 were characterized by FT-Raman and FT-IR spectroscopy. ‘Al--OH’ IR translation modes are observed at 419, 427, 559, 616 and 771 cm−1 with two corresponding Raman bands at 465–477 and 547–553 cm−1. ‘Mg--OH’ IR translation modes are found at 412, 559 and 616 cm−1 with equivalent Raman bands at 464–477 and 547–553 cm−1. The ‘Zn--OH’ IR translation mode is found at 445 cm−1 and the Raman modes around 450 and 495 cm−1. The CO32 − group is identified by the ν1(IR) at 1112 cm−1 and a doublet in the Raman around 1045–1055 and 1060 cm−1. ν2(IR) is observed at 874 cm−1. ν3(IR) is a doublet at 1359 and 1381 cm−1. ν4 is observed in both the IR and Raman spectra around 670 and 695–715 cm−1, respectively. In the OH deformation region, a doublet is observed for ‘Al--OH’ at 955 and 1033 cm−1 in the IR spectra. The ‘Zn--OH’ IR deformation mode is observed at 1462 cm−1. H2O is characterized by a bending mode at 1632 cm−1 and an H-bonded interlayer H2O mode at 3266 cm−1 with a Raman band between 3244 and 3271 cm−1. The OH stretching region is characterized by three bands in the Raman spectra around 3355–3360, 3440–3455 and 3535–3580 cm−1. One band is observed in the IR spectra at 3471 cm−1.

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ID Code: 797
Item Type: Journal Article
Refereed: Yes
Keywords: FT, IR spectroscopy, FT, Raman, hydrotalcite, hydroxycarbonate, layered double hydroxide, LDH, synthesis
DOI: 10.1002/jrs.1244
ISSN: 0377-0486
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2004 John Wiley & Sons
Copyright Statement: The definite version is available on publication at www3.interscience.wiley.com
Deposited On: 09 Mar 2005 00:00
Last Modified: 09 Sep 2016 03:05

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