A New Straightforward Approach to Generate Si–H Groups on Silica

✍ Scribed by L Heeribout; J.B d'Espinose de la Caillerie; A.P Legrand; G Mignani

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 55 KB
• Volume: 215
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1999.6249

✦ Synopsis

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.