network. Pd(II) doped UiO-67 is isostructural to the parent UiO-67 framework, with a high surface area and pore volume of ca. 2000 m2 g−1 and 0.79 cm3 g−1, respectively. The material was highly efficient in the catalytic conversion of aryl chlorides, showing remarkably higher activity than the homogeneous Pd counterparts. High yields were achieved in Heck and Suzuki–Miyaura coupling reactions of chloroarenes
将
有机钯络合物Pd(H 2 bpydc)Cl 2(H 2 bpydc =
2,2'-联吡啶-5,5'-二羧酸)固定在多孔
金属-有机骨架UiO-67(Zr 6 O 4( OH)4(bpdc)6,bpdc =对-
联苯二
甲酸)。使用大量不能螯合Pd络合物的H 2 bpdc
配体(占混合
配体的90 MOl%),可以形成在MOF网络中均匀分布的分离的Pd单活性位点。掺杂Pd(II)的UiO-67与母体UiO-67骨架同构,具有较高的表面积和孔体积约。分别为2000 m 2 g -1和0.79 cm 3 g -1。该材料在芳基
氯化物的催化转化方面非常高效,显示出比均相Pd对应物明显更高的活性。带有广泛取代基的
氯代
芳烃的Heck和Suzuki-Miyaura偶联反应可实现高收率。而且,该催化剂是可回收的和可重复使用的,在至少5个循环后给出基本相同的活性。该系统中均相分子Pd催化剂和固体MOF结构的优点的结