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 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.
Department of Chemistry, Texas A&M University, College Station, TX, 77842-3012 (USA), Fax: (+1) 979-845-5629.
Casie R
CR
Hilliard
Sugam
S
Kharel
Kyle J
KJ
Cluff
Nattamai
N
Bhuvanesh
John A
JA
Gladysz
Janet
J
Blümel
adsorbed phosphine oxides; silica; solid-state NMR spectroscopy; surface chemistry