有机硅聚合物过渡金属络合催化剂的研究——Ⅸ.聚-γ-（乙二胺基）丙基硅氧烷钯络合物的合成及其活性

有机硅聚合物过渡金属络合催化剂的研究——Ⅸ.聚-γ-（乙二胺基）丙基硅氧烷钯络合物的合成及其活性 STUDY OF SILICONE SUPPORTED TRANSITION METAL CATALYSTS Ⅸ. The synthesis and activity of poly-γ-（aminoethylamino） propylsiloxane palladium complex 萧超勃 first-author 林颐庚 任小锋 陈远荫 本文报导聚-γ-（乙二胺基）丙基硅氧烷钯络合物的合成及其对1-己烯、硝基苯、苯乙烯、丙烯腈等不同底物的氢化,探讨不同溶剂、温度、载体等对催化活性的影响。实验结果表明,在甲醇溶剂中和一个氢压下20毫克分子的苯乙烯在含有0.0146毫克原子钯存在下（钯络合物Ⅰ）于40℃35分钟内可氢化90%。它的选择性也是明显的。各种溶剂对氢化活性的影响大致为:（底物硝基苯）甲醇>DMF>异丙醇>THF>丙酮>苯。以二氧化硅为载体制备的钯络合物的催化活性优于三氧化二铝、硅镁吸附剂的钯络合物。催化剂通过简单回收可再用,活性略有降低。 The polymer palladium complex catalyst prepared from palladium chloride and poly-γ-（aminoethylamino）propylsiloxane supported on fumed silica, Al 2 O 3 , Si-Mg adsorbent was described. The title complex has been found to be a very active catalyst for hydrogenation of 1-hexene, styrene, nitrobenzene and acrylonitrile in methanol at 40℃ under an atmosphere pressure of hydrogen. For example, 20mM styrene was hydrogenated up to 90% i the presence of 50mg complex Ⅰ containing 0.0146mg atom palladium within 0.6hr. It is shown that the catalytic activity for hydrogenation of nitrobenzene in a variety of solvents decreases in the order: methanol > DMF > i-propanol > THF > benzene. We also studied the influence of inorganic supports on catalytic activity. The rates of hydrogenation have been measured and found to increase in the order: Al 2 O 3 , Si-Mg adsorbent < fumed silica. The polymer complex can be easily recovered in the solution and reused without serious loss of activity. 中国科学院科学基金 1986-04-01 2021-04-01 4