Like any other silica-based material, SiliaCat presents the following:
- Easy to handle (free flowing, no static charge)
Easy to weigh and handle since silica does not carry a static charge and is always free flowing. Its high density makes it suitable for small volume work. It does not require extensive -washing for high recoveries and will not stick to glassware. It is amenable to automation.
- Robust (mechanically & thermally stable)
Works well with overhead stirring and can stand very high temperature; suitable for microwave synthesizers.
- Rigid & porous structure
- No swelling
- Solvent independent
Silica neither shrinks nor swells in any solvent.
- Fast kinetics
The rate of the reaction is not controlled by the diffusion in and out of the polymer (or other support). SiliaCat does not dictate the solvent of the reaction.
- Lot-to-lot reproducibility
Usually, heterogeneous catalysts supported on a silica matrix are immobilized by post-modification of the inorganic support. These supports, however, present a high degree of leaching due to the poor stability of the immobilized phase. With SiliaCat Heterogeneous Catalysts, the ligand is directly cross linked in an organic-inorganic framework. This results a high degree of stability of the catalysts. Compared to homogeneous catalysts, SiliaCat exhibits a good reactivity and selectivity with one of the major advantages being that the catalyst is eliminated from the reaction mixture by a simple filtration. Forget your purification problems with our SiliaCat catalysts family.
The process for using SiliaCat Heterogeneous Catalysts is outlined in the scheme below.