壳聚糖负载钯催化剂的制备及其在偶联反应中的应用

壳聚糖是一种来源丰富、价格低廉、无毒无害，易降解，环境友好型的天然高分子材料。壳聚糖分子结构中具有大量的羟基与氨基等功能性基团，与金属具有优异的配位能力，完全可以替代合成高分子作为金属催化剂的载体。直接以天然高分子壳聚糖为载体，在酸性条件下采用二氯化钯进行负载，制备壳聚糖负载钯催化剂，对其进行结构表征，并将其应用于催化Suzuki偶联反应，结果表明壳聚糖负载钯催化剂具有优良的催化性能和循环使用性能。

Preparation of Chitosan Supported Palladium Catalyst and Its Application in Coupling Reaction

Chitosan is a kind of natural polymer material with abundant sources, low price, innocuity, easy degradation and environmental friendliness. In the molecular structure of chitosan, there has a large number of functional groups such as hydroxyl group and amino group. Thus, chitosan has excellent coordination ability with metal. It can completely replace the synthetic polymer as the support of metal catalyst. Chitosan supported palladium catalyst was prepared by using natural polymer chitosan as carrier and supported by palladium dichloride under acidic conditions. The structure of the catalyst was characterized and applied to the Suzuki coupling reaction. The results show that it has excellent catalytic and recycling properties.