Preparation and isolation of mono-Nb substituted Keggin-type phosphomolybdic acid and its application as an oxidation catalyst for isobutylaldehyde and Wacker-type oxidation. - Université de Lille Accéder directement au contenu
Article Dans Une Revue Dalton Transactions Année : 2023

Preparation and isolation of mono-Nb substituted Keggin-type phosphomolybdic acid and its application as an oxidation catalyst for isobutylaldehyde and Wacker-type oxidation.

T. Matono
  • Fonction : Auteur
S. Ueno
  • Fonction : Auteur
Y. Kato
  • Fonction : Auteur
N. Umehara
  • Fonction : Auteur
Z. Lang
  • Fonction : Auteur
Y. Li
  • Fonction : Auteur
W. Ninomiya
  • Fonction : Auteur
S. Ishikawa
  • Fonction : Auteur
W. Ueda
  • Fonction : Auteur
T. Sano
  • Fonction : Auteur
M. Sadakane
  • Fonction : Auteur

Résumé

The potassium and proton mixed salt of mono-Nb substituted Keggin-type phosphomolybdate, KH3[PMo11NbO40], was isolated in a pure form by reacting Keggin-type phosphomolybdic acid (H3[PMo12O40]) and potassium hexaniobate (K8Nb6O19) in water, followed by freeze-drying. The all protonic form, H4[PMo11NbO40], was isolated via proton exchange with H-resin and subsequent freeze-drying. The most crucial factor to isolate KH3[PMo11NbO40] and H4[PMo11NbO40] in pure forms is the evaporation of water using the freeze-drying method. Using a similar procedure, the potassium salt of the di-Nb substituted compound K5[PMo10Nb2O40] was isolated. H4[PMo11NbO40] exhibited high catalytic activity for oxidizing isobutylaldehyde to methacrolein and moderate catalytic activity for the Wacker-type oxidation of allyl phenyl ether when combined with Pd(OAc)2.

Domaines

Chimie
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Dates et versions

hal-04450064 , version 1 (09-02-2024)

Identifiants

Citer

T. Matono, S. Ueno, Y. Kato, N. Umehara, Z. Lang, et al.. Preparation and isolation of mono-Nb substituted Keggin-type phosphomolybdic acid and its application as an oxidation catalyst for isobutylaldehyde and Wacker-type oxidation.. Dalton Transactions, 2023, Dalton Transactions, ⟨10.1039/d3dt02451b⟩. ⟨hal-04450064⟩
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