coupled plasma‐atomic emission spectroscopy were carried out to characterize the Pd/Fib. catalyst. Catalytic activity of this finely dispersed palladium was examined in the Heck coupling reaction. The catalytic coupling of aryl halides (‐Cl, ‐Br, ‐I) and olefins led to the formation of the corresponding coupled products in moderate to high yields under air atmosphere. A variety of substrates, including
通过将超声处理的
纤维蛋白纤维在
水中添加到
乙酸钯溶液中,制得
钯-
纤维蛋白复合物(Pd / Fib。)。Pd(OAc)2被
纤维蛋白吸收并被NaBH 4还原在室温下形成Pd(0)纳米粒子。进行了粉末X射线衍射,扫描电子显微镜,能量色散X射线光谱,傅里叶变换红外,CHN元素分析和电感耦合等离子体原子发射光谱,以表征Pd / Fib。催化剂。在Heck偶联反应中检查了这种细分散的
钯的催化活性。芳基卤化物(-Cl,-Br,-I)和烯烃的催化偶联导致在空气气氛下以中等至高收率形成相应的偶联产物。通过简单的步骤,将各种底物,包括富电子和贫电子的芳基卤化物,平稳地转化为目标产物。多相负载的Pd催化剂可以循环使用多次。