Zn-Al layered double hydroxide pillared by different dicarboxylate anions
authors Gago, S; Pillinger, M; Santos, TM; Goncalves, IS
nationality International
journal CERAMICS-SILIKATY
author keywords layered double hydroxides; layered compounds; carboxylate anions; host-guest systems
keywords HYDROTALCITE; CLAYS
abstract Zn-Al layered double hydroxides (LDHs) intercalated by terephthalate (TPH) and biphenyl-4,4'-dicarboxylate (BPH) anions have been synthesized by direct co-precipitation from aqueous solution. The Zn/Al ratio in the final materials was 1.8. The products were characterized by powder X-ray diffraction, thermogravimetric analysis, FTIR and FT Raman spectroscopy, and MAS NMR spectroscopy. The basal spacing for the TPH-LDH intercalate was 14.62A, indicating that the guest anions stack to form a monoloyer with the aromatic rings perpendicular to the host layers. For the LDH intercalate containing BPH anions, a basal spacing of at least 19.2 Angstrom would be expected if the anions adopted an arrangement similar to that for the TPH anions. The observed spacing was 18.24 Angstrom, suggesting that the anions are tilted slightly with respect to the host layers.
publisher INST CHEMICAL TECHNOLOGY, DEPT GLASS CERAMICS
issn 0862-5468
year published 2004
volume 48
issue 4
beginning page 155
ending page 158
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000226490600003
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  impact metrics
journal analysis (jcr 2019):
journal impact factor 0.82
5 year journal impact factor 0.855
category normalized journal impact factor percentile 23.214
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