Advances in Characterisation Methods for Sol-Gel Derived Materials: High Resolution Solid State Nuclear Magnetic Resonance

Abstract

The objective of this paper is to discuss the recent advances in high resolution solid state Nuclear Magnetic Resonance (NMR) to characterise sol-gel derived materials. The first part will be focused on methods to describe M i --O--M j connectivities in sol-gel networks. After a brief review on techniques based on scalar J-coupling, we will focus on the use of 17O solid state NMR experiments. Then in a second part, techniques to probe through-space interactions in hybrid networks will be described, with a particular emphasis on the use of high resolution 1H solid state NMR sequences and related two-dimensional homonuclear or heteronuclear correlations.