Study On Metal Nanomaterials Catalyzing Suzuki Coupling Reaction And The Oxidation Reacton Of Styrene

With the development of nanoscience and nanotechnology, many special properties of nanomaterials was synthesized. As a kind of new material, nanomaterials is widely used in life and industry. Due to metal nanomaterials is smaller size and superior performance than traditional metal materials, the metal nanomaterials occupies very important position in the field of nanometerials. Because of their large special surface area, high surface activity, metal nanomaterials catalysts is often better performance than traditional catalyst. So more and more researchers to look to the synthesis of metal nanometerials catalyst and its research in the field of catalysis.In the paper, first we developed a facile and efficient method for the Suzuki and Heck coupling reaction using Pd nanoclusters generated in sute from Pd(acac)2. Thereafter, using liquid-phase method to synthesize a kind of silver nanoparticles, and we used the Ag nanoparticles as catalyst to catalyze the oxidation reaction of styrene. These Pd and Ag nanoparticles were characterized by TEM and so on. Then the catalytic properties of these small molecule materials were investigated. The work includes too aspects:(1) Under certain conditions, using Pd nanoclusters generated in sute from Pd(acac)2 as catalyst to catalyze the Suzuki and Heck coupling reaction. We used 1-bromo-4-methoxybenzene and phenylboronic acid as model substrates to evaluate the effect of different solvents, catalyst, bases, temperature on the catalytic activity and selectivity of our system. After determining the optimized reaction conditions, we examined the cross-coupling reactions between various aryl bromides or aryl chlorides and boronic acid substrates. By Suzuki coupling reaction with already reported, our catalytic system was efficient and high rates without any ligandless, and also exhibited catalytic potential for the Heck reaction.(2) By liquid-phase chemical reduction method, we used oil amine to reduction silver acetate under the condition of hydrogen. And we obtained Ag nanoparticals. We used the Ag nanoparticles as catalyst to catalyze the oxidation reaction of styrene. After determiningthe optimized reaction conditions, we found the Ag nanoparticles has a certain effect for the oxidation reaction of styrene.