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.
Heeribout
L
Laboratoire de Physique Quantique, E.S.P.C.I., E.S.A. 7069 CNRS, 10, rue Vauquelin, Paris Cedex 05, 75231, France
d'Espinose de la Caillerie JB
Legrand
AP
Mignani
G