Structures and unexpected dynamic properties of phosphine oxides adsorbed on silica surfaces

Casie R Hilliard; Sugam Kharel; Kyle J Cluff; Nattamai Bhuvanesh; John A Gladysz; Janet Blümel

doi:10.1002/chem.201404880

Structures and unexpected dynamic properties of phosphine oxides adsorbed on silica surfaces

Chemistry. 2014 Dec 22;20(52):17292-5. doi: 10.1002/chem.201404880. Epub 2014 Nov 13.

Authors

Casie R Hilliard¹, Sugam Kharel, Kyle J Cluff, Nattamai Bhuvanesh, John A Gladysz, Janet Blümel

Affiliation

¹ Department of Chemistry, Texas A&M University, College Station, TX, 77842-3012 (USA), Fax: (+1) 979-845-5629.

PMID: 25394806
DOI: 10.1002/chem.201404880

Abstract

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 Ph3 PO⋅HOSiPh3 and Cy3 PO⋅H2 O indicate that the interactions with silica involve hydrogen bonding of the P=O group to adsorbed water and surface silanol groups.

Keywords: adsorbed phosphine oxides; silica; solid-state NMR spectroscopy; surface chemistry.