Controlled interactions between anhydrous keggin-type heteropolyacids and silica support: Preparation and characterization of well-defined silica-supported polyoxometalate species

Handle URI:
http://hdl.handle.net/10754/565964
Title:
Controlled interactions between anhydrous keggin-type heteropolyacids and silica support: Preparation and characterization of well-defined silica-supported polyoxometalate species
Authors:
Grinenval, Eva; Rozanska, Xavier; Baudouin, Anne Christine; Berrier, Élise; Delbecq, Françoise; Sautet, Philippe; Basset, Jean-Marie ( 0000-0003-3166-8882 ) ; Lefèbvre, Frédéric
Abstract:
Anhydrous Keggin-type phosphorus heteropolyacids were deposited on partially dehydroxylated silica by using the surface organometallic chemistry (SOMC) strategy. The resulting solids were characterized by a combination of physicochemical methods including IR, Raman, 1D and 2D 1H, and 31P MAS NMR, electron microscopy experiments and density functional theory (DFT) calculations. It is shown that the main surface species is [ - Si(OH...H+)]2[H+]1[PM 12O403-] where the polyoxometalate is linked to the support by proton interaction with two silanols. Two other minor species (10% each) are formed by coordination of the polyoxometalate to the surface via the interaction between all three protons with three silanol groups or via three covalent bonds formed by dehydroxylation of the above species. Comparison of the reactivity of these solids and of compounds prepared by a classical way shows that the samples prepared by the SOMC approach contain ca. 7 times more acid sites. © 2010 American Chemical Society.
KAUST Department:
KAUST Catalysis Center (KCC); Physical Sciences and Engineering (PSE) Division; Chemical Science Program
Publisher:
American Chemical Society (ACS)
Journal:
The Journal of Physical Chemistry C
Issue Date:
11-Nov-2010
DOI:
10.1021/jp107317s
Type:
Article
ISSN:
19327447
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorGrinenval, Evaen
dc.contributor.authorRozanska, Xavieren
dc.contributor.authorBaudouin, Anne Christineen
dc.contributor.authorBerrier, Éliseen
dc.contributor.authorDelbecq, Françoiseen
dc.contributor.authorSautet, Philippeen
dc.contributor.authorBasset, Jean-Marieen
dc.contributor.authorLefèbvre, Frédéricen
dc.date.accessioned2015-08-12T08:57:09Zen
dc.date.available2015-08-12T08:57:09Zen
dc.date.issued2010-11-11en
dc.identifier.issn19327447en
dc.identifier.doi10.1021/jp107317sen
dc.identifier.urihttp://hdl.handle.net/10754/565964en
dc.description.abstractAnhydrous Keggin-type phosphorus heteropolyacids were deposited on partially dehydroxylated silica by using the surface organometallic chemistry (SOMC) strategy. The resulting solids were characterized by a combination of physicochemical methods including IR, Raman, 1D and 2D 1H, and 31P MAS NMR, electron microscopy experiments and density functional theory (DFT) calculations. It is shown that the main surface species is [ - Si(OH...H+)]2[H+]1[PM 12O403-] where the polyoxometalate is linked to the support by proton interaction with two silanols. Two other minor species (10% each) are formed by coordination of the polyoxometalate to the surface via the interaction between all three protons with three silanol groups or via three covalent bonds formed by dehydroxylation of the above species. Comparison of the reactivity of these solids and of compounds prepared by a classical way shows that the samples prepared by the SOMC approach contain ca. 7 times more acid sites. © 2010 American Chemical Society.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleControlled interactions between anhydrous keggin-type heteropolyacids and silica support: Preparation and characterization of well-defined silica-supported polyoxometalate speciesen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentChemical Science Programen
dc.identifier.journalThe Journal of Physical Chemistry Cen
kaust.authorBasset, Jean-Marieen
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