ABSTRACT
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 855
Useful NMR methods . . . . . . . . . . . . . . . . . . . . . . . 855
Experimental Results: 29Si Analysis . . . . . . . . . . . . 856
Surface Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 856
Statistical Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . 856
Experimental Results: Proton Analysis . . . . . . . . . . 858 1H Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 858
N-Quantum Coherence or Spin Counting . . . . . . 859
Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 859
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 859
“The properties of amorphous silicas of high specific
surface area, from the smallest colloidal particles to
macroscopic gels, depend largely on the chemistry of the
surface of the solid phase” [1].
