Controlled Immobilization of Palladium Nanoparticles in Two Different Fluorinated Polymeric Aggregate Cores and Their Application in Catalysis
Controlled Immobilization of Palladium Nanoparticles in Two Different Fluorinated Polymeric Aggregate Cores and Their Application in Catalysis
复制标题
钯纳米粒子在两种不同氟化聚合物聚集体核中的受控固定化及其在催化中的应用
DOI：
10.1007/s00396-011-2567-9
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发表时间：
2011
影响因子：
2.4
通讯作者：
and H. Sawada
中科院分区：
文献类型：
--
作者：
T. Kijima;I. Javakhishvili;K. Jankova;S. Hvilsted;S. Kodama;M. Sugiya;and H. Sawada
在氯化钠和相应的氟化冷却剂存在下，以氯化钯和乙酸钠为原料，制备了端基甜菜碱型氟碳纳米复合固载钯纳米粒子。在类似的条件下，用相应的嵌段共聚物制备了含聚(2，3，4，5，6-五氟苯乙烯)的ABA-三嵌段共聚物纳米复合材料-钯纳米粒子的外层嵌段。透射电子显微镜图像显示，钯纳米粒子可以固定在含氟冷却聚合物纳米复合核的外面；相反，钯纳米粒子可以有效地固定在这些含氟的ABA-三嵌段共聚纳米复合核内。因此，这两种不同的含氟共聚物使得钯纳米颗粒能够受控地固定在含氟纳米复合材料核心中。将这些氟化纳米复合材料-固定化的钯纳米颗粒应用于铃木-宫浦交叉偶联反应的催化剂中，观察到这些纳米复合材料之间的不同反应活性。图为控制固定化钯纳米颗粒在两个不同的含氟纳米复合材料核心中。将钯纳米粒子固定在含氟甜菜碱型冷却聚合物纳米复合核上；相比之下，钯纳米粒子有效地固定在含聚(2，3，4，5-五氟苯乙烯)的共聚纳米复合核中。将这些氟化纳米复合材料负载的钯纳米粒子应用于铃木-宫浦交叉偶联反应的催化剂中。
Fluoroalkyl end-capped betaine-type cooligomeric nanocomposites-immobilized palladium nanoparticles were prepared by the reactions of palladium chloride with sodium acetate in the presence of sodium chloride and the corresponding fluorinated cooligomers. Outer blocks of poly(2,3,4,5,6-pentafluorostyrene)-containing ABA-triblock copolymeric nanocomposites-immobilized palladium nanoparticles were prepared by the use of the corresponding block copolymers under similar conditions. TEM images showed that palladium nanoparticles can be immobilized outside the fluorinated cooligomeric nanocomposite cores; in contrast, palladium nanoparticles can be effectively immobilized inside these fluorinated ABA-triblock copolymeric nanocomposite cores. Thus, these two different fluorinated copolymers enabled the controlled immobilization of palladium nanoparticles in the fluorinated nanocomposite cores. These fluorinated nanocomposites-immobilized palladium nanoparticles were also applied to the catalysts for Suzuki-Miyaura cross-coupling reaction, and the different reactivity between these nanocomposites was observed.FigureControlled immobilization of palladium nanoparticles in two different flourinated nanocomposite cores was observed. Palladium nanoparticles were immobilized onto fluorinated betaine-type cooligomeric nanocomposite cores; in contrast, palladium nanoparticles were effectively immobilized inside poly(2,3,4,5-pentafluorostyrene)-containing copolymeric nanocomposite cores. These fluorinated nanocomposites-immobilized palladium nanoparticles were applied to the catalysts for Suzuki-Miyaura cross-coupling reaction