Organic-inorganic hybrid materials incorporating phosphorus centres. Evidence for some factors controlling the accessibility of phosphorus centres

Publisher Website
Google Scholar
Abstract
The accessibility of phosphorus centres incorporated into hybrid organic-inorganic materials prepared from various phosphines bearing two or three hydrolysable SiX 3 groups has been investigated by using some classical reactions at phosphorus centres. Estimation of the yields of the reaction has been established by high power proton decoupling magic angle spinning (HPDEC MAS) solid state 31 P NMR spectroscopy. It was found that reagents such as H 2 O 2 , S 8 as well as THF·BH 3 and MeI can reach all the phosphorus centres whatever the starting material. In contrast, remarkable differences of accessibility of phosphorus centres in the studied solids were found for the more bulky reagent THF·W(CO) 5 . From these results, it appears that the accessibility of the phosphorus centres depends on the structure of the precursor, the degree of condensation of the polysilsesquioxane network, and the specific surface area of the material.

This publication has 0 references indexed in Scilit: