A New Straightforward Approach to Generate Si-H Groups on Silica.
In this paper it is demonstrated unequivocally by solid-state nuclear magnetic resonance and diffuse reflectance infrared Fourier transform spectroscopies that, at high temperature, hydrogen reacts directly with pyrogenic silica to form stable hydride Si-H groups. Such modified silicas should exhibit specific properties far from those of silicas having only surface silanol groups. The interest for hydride-modified silicas arises from the possibility of using their Si-H groups as reducing agents or as active sites for the synthesis of new chromatographic phases. Copyright 1999 Academic Press.
Laboratoire de Physique Quantique, E.S.P.C.I., E.S.A. 7069 CNRS, 10, rue Vauquelin, Paris Cedex 05, 75231, France
L
Heeribout
d'Espinose de la Caillerie JB
AP
Legrand
G
Mignani