A new synthetic route for compounds prepared from Keggin heteropolyacids and pyridine derivatives
authors Santos, FM; Nogueira, HIS; Cavaleiro, AMV; Gomes, ED; Belsley, MS
nationality International
journal INORGANICA CHIMICA ACTA
author keywords Polyoxometalates; Keggin; Heteropolyacids; Pyridine derivatives; Solid-solid reaction; Mechanochemistry
keywords STATE CHEMICAL-REACTION; 4-PHENYLPYRIDINIUM HYDROGEN SQUARATE; ORGANIC-INORGANIC HYBRIDS; SOLID-STATE; POLYOXOMETALATE MATERIALS; HETEROGENEOUS CATALYSIS; VIBRATIONAL-SPECTRA; CRYSTAL-STRUCTURE; ROOM-TEMPERATURE; SINGLE-CRYSTAL
abstract The synthesis of inorganic/organic hybrid compounds by solid-solid reactions of the hydrated wheteropolyacids H-3[PM12O40]center dot nH(2)O (M = Mo, W) with selected substituted pyridines having different sizes and functionalities is described. Several new compounds were prepared at room temperature and characterised by infrared and UV-Vis absorption spectroscopies, powder X-ray diffraction and analytical techniques. Related materials prepared by precipitation from solution were also studied and the comparison was made between results obtained with the different preparative procedures. This is the first systematic account on the acid-base reaction of solid heteropolyacids and solid pyridine derivatives, without the addition of any solvent. The obtained results indicate that the obtained crystalline powders may present physical properties different from related materials prepared by precipitation from solution. (C) 2016 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0020-1693
isbn 1873-3255
year published 2017
volume 455
beginning page 600
ending page 606
digital object identifier (doi) 10.1016/j.ica.2016.05.017
web of science category Chemistry, Inorganic & Nuclear
subject category Chemistry
unique article identifier WOS:000390722500030
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5 year journal impact factor (jcr 2016): 1.749
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