title: Grafting of Secondary Diolamides onto [P2 W15 V3 O62 ](9-) Generates Hybrid Heteropoly Acids.
abstract: The Dawson tungstovanadate [P2 W15 V3 O62 ](9-) can be grafted to secondary diolamides. The electron-withdrawing character of the polyanion increases the acidity of the amide proton, leading to an organo-polyoxometalate, which can be used as a Brønsted organocatalyst. High-field NMR and DFT modeling indicate that the amide proton stays on the nitrogen and that the exalted acidity derives from the interaction between the organic and inorganic parts of the organo-polyoxometalate. The amide-inserted vanadotungstates thus form a new family of (hybrid) heteropolyacids, offering new perspectives for the application of POM-based catalysis in organic synthesis.
authors.affiliation: ICSN CNRS, 1 avenue de la Terrasse, 91198, Gif-sur-Yvette Cedex, France.
authors.forename: David
authors.initials: D
authors.lastname: Lachkar
authors.affiliation: Univ Lyon, CPE Lyon, Université Claude Bernard Lyon1, CNRS, Institut de chimie de Lyon, C2P2 UMR 5265, 69616, Villeurbanne, France.|Univ Lyon, Université Claude Bernard Lyon1, ENS Lyon, CNRS, Institut de chimie de Lyon, ISA-CRMN UMR 5280, 69100, Villeurbanne, France.|Uni Lyon, ENS de Lyon, CNRS, Université Lyon 1, Laboratoire de chimie, UMR 5182, 69342, Lyon, France.
authors.forename: Debora
authors.initials: D
authors.lastname: Vilona
authors.affiliation: Uni Lyon, ENS de Lyon, CNRS, Université Lyon 1, Laboratoire de chimie, UMR 5182, 69342, Lyon, France. elise.dumont@ens-lyon.fr.
authors.forename: Elise
authors.initials: E
authors.lastname: Dumont
authors.affiliation: Univ Lyon, Université Claude Bernard Lyon1, ENS Lyon, CNRS, Institut de chimie de Lyon, ISA-CRMN UMR 5280, 69100, Villeurbanne, France. moreno.lelli@ens-lyon.fr.
authors.forename: Moreno
authors.initials: M
authors.lastname: Lelli
authors.affiliation: ICSN CNRS, 1 avenue de la Terrasse, 91198, Gif-sur-Yvette Cedex, France. emmanuel.lacote@univ-lyon1.fr.|Univ Lyon, CPE Lyon, Université Claude Bernard Lyon1, CNRS, Institut de chimie de Lyon, C2P2 UMR 5265, 69616, Villeurbanne, France. emmanuel.lacote@univ-lyon1.fr.
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Lacôte
keywords: acid derivatives; hydrogen transfer; organic-inorganic hybrid composites; organocatalysis; polyoxometalates