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Surface intermediate species of the 4-isobutylacetophenone adsorption-reaction over fosfotungstic Wells-Dawson heteropoly acid
(Planta Piloto de Ingeniería Química, 2009-12)
Surface adsorbed species of isobutylbenzene and 4-isobutylacetophenone on bulk fosfotungstic Wells-Dawson acid have been screened in the present investigation. The evolution of chemisorbed species towards products was ...
Tailored Brønsted and Lewis surface acid sites of the phosphotungstic Wells Dawson heteropoly-acid
(Elsevier Science, 2019-11)
The synthesis of transition metals Wells Dawson heteropoly salts along with their elemental composition, water content, structure and specific surface area were thoroughly investigated. Additionally, the use of a molecular ...
Efficient method for tetrahydropyranylation/depyranylation of phenols and alcohols using a solid acid catalyst with Wells-Dawson structure
(Pergamon-Elsevier Science Ltd, 2002-10)
A simple and efficient procedure to form 2-tetrahydropyranyl acetals of phenols and alcohols is reported. Wells-Dawson heteropolyacid catalyst is used both in bulk form or supported on silica, reaction conditions include ...
Efficient deprotection of phenol methoxymethyl ethers using a solid acid catalyst with Wells-Dawson structure
(Molecular Diversity Preservation International, 2001-11-30)
Deprotection of various phenols from their respective methoxymethyl ethers using an heteropolyacid catalyst was studied. The catalyst was the Wells-Dawson heteropolyacid, used both in bulk or supported on silica. Yields ...
Environmentally friendly synthesis of Wells-Dawson heteropolyacids. Active acid sites investigation through TPSR of isopropanol
(Elsevier Science, 2008-04)
Fosfo-tungstic and fosfo-molybdic Wells-Dawson heteropolyacids, H6P2W18O62·xH2O and H6P2Mo18O62·xH2O respectively, were synthesized through ion-exchange. This novel method possesses a higher yield (∼90%) than the conventional ...
Investigation of the thermal stability of fosfotungstic Wells-Dawson heteropoly acid through in situ Raman spectroscopy
(Elsevier, 2011-07-20)
The present investigation applies laser Raman spectroscopy under in situ conditions to obtain insights on the effect of the temperature on the molecular structure of the bulk phosphotungstic Wells-Dawson heteropoly-acid ...