Structures and Unexpected Dynamic Properties of Phosphine Oxides Adsorbed on Silica Surfaces

Solid‐state NMR spectroscopy of selected phosphine oxides adsorbed on silica surfaces establishes the surface mobilities, even of phosphine oxides with high melting points. Crystal structures of the adducts Ph3PO⋅HOSiPh3 and Cy3PO⋅H2O indicate that the interactions with silica involve hydrogen bondi...

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Bibliographic Details
Published in:Chemistry : a European journal 2014-12, Vol.20 (52), p.17292-17295
Main Authors: Hilliard, Casie R., Kharel, Sugam, Cluff, Kyle J., Bhuvanesh, Nattamai, Gladysz, John A., Blümel, Janet
Format: Article
Language:English
Subjects:
Adducts
adsorbed phosphine oxides
Chemistry
Crystal structure
Dynamic mechanical properties
Hydrogen bonding
Melting points
NMR spectroscopy
Phosphine oxide
silica
Silicon dioxide
solid-state NMR spectroscopy
Spectrum analysis
surface chemistry
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Summary:Solid‐state NMR spectroscopy of selected phosphine oxides adsorbed on silica surfaces establishes the surface mobilities, even of phosphine oxides with high melting points. Crystal structures of the adducts Ph3PO⋅HOSiPh3 and Cy3PO⋅H2O indicate that the interactions with silica involve hydrogen bonding of the PO group to adsorbed water and surface silanol groups. Solid‐state NMR spectroscopy of selected phosphine oxides adsorbed on silica surfaces establishes the surface mobilities, even of phosphine oxides with high melting points. Crystal structures of the adducts Ph3PO⋅HOSiPh3 and Cy3PO⋅H2O indicate that the interactions with silica involve hydrogen bonding of the PO group to adsorbed water and surface silanol groups (see figure).
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201404880