Study On The Hydrosilylation Reaction Catalyzed By Metal-Organic Coordination Polymer

With the continuous development of the silicone industry,its products have gradually integrated into our daily production and life.Silicone chemicals are widely used in various fields of production and life due to their unique stability and biological inertness.In many silicone was synthesized chemicals is the most common hydrosilylation reaction.To date,the main reaction is catalyzed by a noble metal catalyst is still due to its high price,the limited reserves,it is difficult to recycling problems.To solve these problems researchers have combined with low non-precious metal prices,easy separation of heterogeneous catalysts and other characteristics,the development of non-precious metal based heterogeneous catalysts.We designed and synthesized based on non-noble metal and a heterogeneous catalyst for catalyzing hydrosilylation reaction.Select the most popular covalent organic framework COF as the research object,and coordinate it with transition metals(Co,Ni)through appropriate methods to obtain COF-Co and COF-Ni two types of heterogeneous catalysts;simultaneously synthesize metal organic polymer MOF series catalyst.The catalysts were fully characterized by FT-IR,SEM,EDS,XRD.The results showed that an amount of 1%COF catalyst without solvent,activator-catalyzed conditions with linear olefins Ph₂Si H₂ good catalytic activity and selectivity.COF-Co catalysts good stability,catalytic after five cycles,no reactivity decreased;1%Na BHEt₃ under conditions as an activator,an amount of 0.1%for MOF-Co catalysts and styrene and derivatives thereof Ph₂Si H₂ The addition reaction shows good catalytic activity.It has good selectivity of addition products and recycling performance,and the activity is not significantly reduced after five cycles of catalysis.