Molecular assembly in synthesised hydrotalcites of formula CuxZn6-xAl2(OH)16(CO3) . 4H2O-a vibrational spectroscopic study
Frost, Ray L., Ding, Zhe, Martens, Wayde N., Johnson, Therese E., & Kloprogge, J. Theo (2003) Molecular assembly in synthesised hydrotalcites of formula CuxZn6-xAl2(OH)16(CO3) . 4H2O-a vibrational spectroscopic study. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 59(2), pp. 321-328.
Infrared and Raman spectroscopy have been used to characterize synthetic hydrotalcites of formula CuxZn6-xAl2(OH)16(CO3).4H2O . The spectra have been used to assess the molecular assembly of the cations in the hydrotalcite structure. The spectra may be conveniently subdivided into spectral features based (a) upon the carbonate anion (b) the hydroxyl units (c) water units. The Raman spectra of the hydroxyl-stretching region enable bands to be assigned to the CuOH, ZnOH and AlOH units. It is proposed that in the hydrotalcites with minimal cationic replacement that the cations are arranged in a regular array. For the CuxZn6-xAl2(OH)16(CO3).4H2O hydrotalcites, spectroscopic evidence suggests that 'islands' of cations arte formed in the structure. In a similar fashion the bands assigned to the interlayer water suggest that the water molecules are also in a regular well-structured arrangement. Bands are assigned to the hydroxyl stretching vibrations of water. Three types of water are identified (a) water hydrogen bonded to the interlayer carbonate ion (b) water hydrogen bonded to the hydrotalcite hydroxyl surface and (c) interlamellar water. It is proposed that the water is highly structured in the hydrotalcite as it is hydrogen bonded to both the carbonate anion and the hydroxyl surface.
Impact and interest:
Citation countsare sourced monthly fromand citation databases.
These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.
Citations counts from theindexing service can be viewed at the linked Google Scholar™ search.
Full-text downloadsdisplays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.
|Item Type:||Journal Article|
|Keywords:||hydrotalcite, infrared spectroscopy, Raman microscopy, molecular assembly, structured water|
|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 2003 Elsevier|
|Copyright Statement:||Reproduced in accordance with the copyright policy of the publisher.|
|Deposited On:||13 Apr 2005|
|Last Modified:||29 Feb 2012 22:59|
Repository Staff Only: item control page