Details

Autor(en) / Beteiligte

• Sadakane, Masahiro
• Ichi, Yutaro
• Ide, Yusuke
• Sano, Tsuneji

Titel

Thermal Stability and Acidic Strength of Preyssler-Type Phosphotungstic Acid, H14[P5W30O110Na] and It's Catalytic Activity for Hydrolysis of Alkyl Acetates

Ist Teil von

• Zeitschrift für anorganische und allgemeine Chemie (1950), 2011-12, Vol.637 (14-15), p.2120-2124

Ort / Verlag

Weinheim: WILEY-VCH Verlag

Erscheinungsjahr

2011

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Full structural analysis of Preyssler‐type phosphotungstic acid, H14[P5W30O110Na], using 183W NMR, 31P NMR, and IR spectroscopy, as well as complete elemental analysis revealed that H14[P5W30O110Na]·44H2O was obtained in pure form. H14[P5W30O110Na] started to decompose by heating at 373 K and was less stable than Keggin‐type phosphotungstic acid, H3PW12O40·6H2O, which was stable even after heating at 673 K. Acidic strength measurements using trimethyl phosphine oxide (Me3P=O) as a probe molecule indicated that the acidic strength of H14[P5W30O110Na] was greater than that of H3PW12O40 on the basis of the amount of acid in an aqueous solution. H14[P5W30O110Na] was less active than H3PW12O40 for hydrolysis of alkyl acetates on the basis of acid amount. However, H14[P5W30O110Na] was more active than H3PW12O40 for hydrolysis of alkyl acetates with small alkyl groups on the basis of catalyst weight because acid amount per weight of H14[P5W30O110Na] was about two times higher than that of H3PW12O40.