Title: Synthesis and characterization of hybrid materials based on 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid and Dawson-type tungstophosphate K-7[H4PW18O62] center dot 18H(2)O and K-6[P2W18O62] center dot 13H(2)O
Authors: Ammam, Malika ×
Fransaer, Jan #
Issue Date: Apr-2011
Publisher: Academic Press
Series Title: Journal of Solid State Chemistry vol:184 issue:4 pages:818-824
Abstract: In this study, we synthesized hybrid materials using well-Dawson polyoxometalates (POMs), K-7[H4PW18O62] center dot 18H(2)O or K-6[P2W18O62] center dot 13H(2)O and a room temperature ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]). K, W, P and CHN elemental analysis showed that one mole of [H4PW18O62](7-) reacts with 6 moles of BMIM+ and one mole of [P2W18O62](6-) reacts with 4 moles of BMIM+ to form, respectively, K[BMIM](6)H4PW18O62 and K-2[BMIM](4)P2W18O62. X-ray diffraction illustrated amorphous structure of the hybrid materials. FT-IR spectra showed the presence of both 1-butyl-3methylimidazolium cation and the Dawson anion. TG analysis displayed a relative thermal stability of the hybrid materials compared to the parents Dawson POMs. Cyclic voltammetry showed that the reduction peak potentials of the Dawson anion in the hybrid materials shift towards negative values and the shift is more pronounced for K[BMIM](6)H4PW18O62 compared to K-2[BMIM](4)P2W18O62. This was attributed to a decrease in the acidity of the Dawson POM anion in the hybrid material. (C) 2011 Elsevier Inc. All rights reserved.
ISSN: 0022-4596
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Chemical and Extractive Metallurgy Section (-)
× corresponding author
# (joint) last author

Files in This Item:
File Description Status SizeFormat
pub05657.pdfMain article Published 781KbAdobe PDFView/Open Request a copy

These files are only available to some KU Leuven Association staff members


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science