A new straightforward approach to generate Si-H groups on silica

In this paper it is demonstrated unequivocally by solid-state nuclear magne tic resonance and diffuse reflectance infrared Fourier transform spectrosco pies that, at high temperature, hydrogen reacts directly with pyrogenic sil ica to form stable hydride Si-H groups. Such modified silicas should exhibi t specific properties far from those of silicas having only surface silanol groups. The interest for hydride-modified silicas arises from the possibil ity of using their Si-H groups as reducing agents or as active sites for th e synthesis of new chromatographic phases. (C) 1999 academic Press.