金属纳米粒子催化Suzuki偶联反应及苯乙烯的氧化性能研究

发布时间：2018-07-01 13:19

本文选题：金属纳米 + Suzuki　；参考：《苏州大学》2015年硕士论文

【摘要】：随着纳米科学与技术的日益发展,人类合成了许多具有特殊性能的纳米材料。纳米材料作为做一种新型的材料,在生活及工业中具有广泛的应用。由于金属纳米材料比传统金属材料尺寸小、性能更优异等特点,金属纳米材料在纳米材料领域中占有很重要的位置。在科学研究方面,鉴于金属纳米材料催化剂比表面积大、表面活性高,其性能往往优于传统催化剂。所以越来越多的科研工作者将目光投向了金属纳米催化剂的合成及其在催化领域的研究。本文首先利用乙酰丙酮钯分离得到的钯纳米颗粒催化Suzuki和Heck交叉偶联反应,其后采用液相法合成了一种银纳米粒子,并将该银纳米粒子应用在苯乙烯催化氧化反应中。通过透射电子显微镜(TEM)等测试手段,分别对其中的钯纳米粒子和银纳米粒子催化剂进行了表征,并研究了其相关化学催化性能。主要工作包括以下方面:(1)在一定条件下,通过乙酰丙酮钯分离得到钯纳米簇,利用该过程产生的钯纳米粒子催化Suzuki及Heck偶联反应。以4-甲氧基溴苯和苯硼酸作为反应原料,分别对催化剂、反应溶剂、反应添加剂、温度等进行了筛选,探索出最佳反应条件,并对底物进行了拓展。同时我们将该体系也应用在Heck偶联反应中。通过与已经报道过的Suzuki偶联反应相比较,我们的催化体系无需任何配体,反应快速高效并且也能应用在Heck偶联反应中。(2)采用液相法化学还原法,在氢气条件下,用油胺还原醋酸银得到银纳米粒子。并用该Ag纳米粒子催化苯乙烯的氧化反应。通过对反应条件的筛选,优化了反应条件,发现该Ag纳米粒子对于催化苯乙烯选择性氧化具有一定的效果。
[Abstract]:With the development of nanoscience and technology, many nanomaterials with special properties have been synthesized. Nanomaterials, as a new type of materials, are widely used in life and industry. Metal nanomaterials play an important role in the field of nanomaterials because of their smaller size and better performance than traditional metal materials. In the aspect of scientific research, because of the large specific surface area and high surface activity of metal nanomaterials, their properties are often superior to those of traditional catalysts. Therefore, more and more researchers are focusing on the synthesis of metal nanocatalysts and their research in the field of catalysis. In this paper, the palladium nanoparticles separated from palladium acetylacetone were used to catalyze Suzuki and Heck cross-coupling reactions, then a silver nanoparticles were synthesized by liquid phase method, and the silver nanoparticles were used in the catalytic oxidation of styrene. The palladium nanoparticles and silver nanoparticles were characterized by transmission electron microscopy (TEM) and their related chemical catalytic properties were studied. The main work includes the following aspects: (1) Palladium nanoclusters were separated by palladium acetylacetone under certain conditions and the palladium nanoparticles were used to catalyze Suzuki and Heck coupling reactions. Using 4-methoxy bromobenzene and phenylboric acid as raw materials, the catalyst, reaction solvent, reaction additive and temperature were screened, the optimum reaction conditions were explored and the substrate was expanded. At the same time, we also applied the system to the Heck coupling reaction. Compared with the Suzuki coupling reaction, our catalytic system is fast and efficient without any ligand, and can also be used in the Heck coupling reaction. (2) the liquid phase chemical reduction method is used under hydrogen condition. Silver nanoparticles were obtained by reduction of silver acetate with oleamine. The Ag nanoparticles were used to catalyze the oxidation of styrene. The reaction conditions were optimized by screening the reaction conditions. It was found that the Ag nanoparticles had a certain effect on the selective oxidation of styrene.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1

【共引文献】