on GO. The composite material showed high catalytic activity in Suzuki–Miyaura, Ullmann coupling and cyanation reactions. The heterogeneity of the composite was confirmed by a hot filtration test. The immobilized PNP–PdII shows comparable activity to its homogeneous analogue 2. The recycling ability of the catalyst was examined for five consecutive runs, which showed little or no reduction in its catalytic
氨基双(膦)-Pd II络合物(
PNP-Pd II)[PdCl 2 (Ph 2 P)2 N(CH 2)3 Si(OMe)3 }](2)的接枝通过在2的甲氧基
硅烷基与GO的羟基之间的缩合反应进行。通过FTIR光谱,固态31 P NMR光谱,
SEM,
TEM,XPS和ICP-AES技术对复合材料进行了表征。所有这些工具都支持化合物2的清洁固定在GO上。该复合材料在Suzuki-Miyaura,Ullmann偶联和
氰化反应中显示出高催化活性。通过热过滤试验证实了复合材料的不均匀性。固定化的
PNP-Pd II具有与其同类类似物2相当的活性。在连续五次运行中检查了催化剂的循环能力,显示其催化效率几乎没有或没有下降。