A new synthetic route for compounds prepared from Keggin heteropolyacids and pyridine derivatives
The synthesis of new compounds by reaction of the heteropolyacids H3[PM12O40]·nH2O (M=Mo, W) and selected substituted pyridines were performed by two different preparative methods: a mechanochemical methodology (based on the grinding of the starting materials and by the more common procedure of mixi...
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Veröffentlicht in: | Inorganica Chimica Acta 2017-01, Vol.455, p.600-606 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The synthesis of new compounds by reaction of the heteropolyacids H3[PM12O40]·nH2O (M=Mo, W) and selected substituted pyridines were performed by two different preparative methods: a mechanochemical methodology (based on the grinding of the starting materials and by the more common procedure of mixing the reagents in solution. Several new compounds were prepared at room temperature and characterised by infrared and UV–Vis absorption spectroscopies, powder X-ray diffraction and analytical techniques. [Display omitted]
•Solid–solid reactions between heteropolyacids and substituted pyridines were studied.•Related compounds with heteropolyanions and pyridines were prepared from solution.•Compounds with the formula (organic cation)3PM12O40]·nH2O were obtained by both methods.•The products obtained by the different procedures were compared.
The synthesis of inorganic/organic hybrid compounds by solid–solid reactions of the hydrated heteropolyacids H3[PM12O40]·nH2O (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. |
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ISSN: | 0020-1693 1873-3255 |
DOI: | 10.1016/j.ica.2016.05.017 |