活性炭负载壳聚糖络合铂配合物催化硅氢加成反应

Hydrosilylation of alkenes catalyzed by active carbon supported chitosan platinum complex

以活性炭为载体,将壳聚糖(CS)负载到活性炭上得到复合载体,利用CS对Pt的螯合作用,制备活性炭负载CS络合Pt配合物催化剂(AC—CS—Pt),并考察了AC—CS—Pt催化剂催化烯烃与三乙氧基硅烷加成反应性能。采用X-射线衍射(XRD)、红外光谱(IR)和热重分析(TG)对AC—CS—Pt进行了表征,结果表明Pt与CS氨基N原子配位形成Pt—N配位键。对辛烯硅氢加成反应,AC—CS—Pt催化剂显示高活性和极好的产物选择性,β-加成产物的选择性达99%;具有良好的重复使用性能,AC—CS—Pt催化剂经简单过滤分离后,可连续使用14次而活性没有明显下降。

Active carbon supported chitosan coordinated with platinum complex （AC--CS--Pt） was prepared. The AC-- CS--Pt catalyst was characterized by XRD, IR and TG. The results indicated that coordination bond between platinum and nitrogen atom of chitosan was formed. AC--CS--Pt catalyst showed the remarkable regioselectivity, high catalytic activity and good reusability in the hydrosilylation of 1-oetene with tri- ethoxysilane. AC--CS--Pt was recovered by simple filtration and reused for fourteen times without noticeable loss of catalytic activity.