Palladium Nanoparticles Encapsulated in a Metal-Organic Framework as Efficient Heterogeneous Catalysts for Direct C2 Arylation of Indoles
作者:Yuanbiao Huang、Zujin Lin、Rong Cao
DOI:10.1002/chem.201101705
日期:2011.11.4
obtained Pd NPs was in good agreement with the cage diameters (2.9 and 3.4 nm) of the MOF. The resulting Pd/MIL‐101(Cr) catalyst exhibited extremely high catalytic activities in the direct C2 arylation of substituted indoles by using only 0.1 mol % of the Pd catalyst. Moreover, the catalyst is easily recoverable and can be reused several times without leaching into solution and loss of activity. The combination
使用湿法浸渍法制备了封装在金属-有机骨架(MOF)MIL-101(Cr)的介孔笼中的高度分散的钯纳米粒子(Pd NPs)。Pd NP的特征是粉末X射线衍射(PXRD),N 2吸附,透射电子显微镜,电感耦合等离子体原子发射光谱(ICP-AES)和X射线光电子能谱(XPS)。所获得的Pd NPs的粒径((2.6±0.5)nm)与MOF的笼径(2.9和3.4 nm)高度吻合。通过仅使用0.1 mol%的Pd催化剂,所得的Pd / MIL-101(Cr)催化剂在取代的吲哚的直接C2芳基化中显示出极高的催化活性。而且,该催化剂易于回收并且可以重复使用多次,而不会渗入溶液中并失去活性。