Grafting of phosphonate groups on the silica surface and characterization with spectroscopic methods /

Abstract

The research presented here describes the synthesis and characterization of the phosphonate modified silica gel via the grafting approach. A new approach for the regioslective synthesis of ready-to-graft silylated phosphonates via the catalytic hydrosilylation reactions between the phosphonate with an olefin moiety and the alkoxysilane was developed. The one-step and multiple-step grafting processes were studied by the means of solid state 29Si, 13C and 13p CPIMAS NMR. The mild cleavage of ethyl esters of phosphonate bonded on the silica surface was also investigated.