Polymers polymeric silica-based materials

Most of the more recent studies have concentrated on rhodium. An effective system for a gas-phase reaction was reported by Arai et al. (107). The catalyst support was silica gel, which was desirable for its high surface area properties (293 m3/g). This was covered with a polymer formed from styrene and divinylbenzene, either by emulsion (A) or by solution (B) polymerization. Each of these base materials was then functionalized by the reactions shown in Eq. (49). 

Supercritical pSFC applications can be defined as those in which the mobile phase is a single substance heated and pressurized above its critical point. Carbon dioxide has overwhelmingly been the compound of choice for these mobile phases. Stationary phases typically used for these applications have been polymeric materials or polymer-coated porous silica. Chromatography on uncoated silica-based stationary phases with CO2 has, in general, been unsuccessful. 

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