节点文献
5,7-二溴-8-羟基喹啉锰配合物催化H2O2选择氧化乙苯
Selective Oxidation of Ethylbenzene with Hydrogen Peroxide Catalyzed by 5,7-Dibromo-8-quinolinolato Manganese Complexes
【摘要】 设计合成了5,7-二溴-8-羟基喹啉锰的四齿和六齿配合物(Q2MnⅡ和Q3MnⅢ),并用傅里叶变换红外(FT-IR)光谱对两个配合物进行了表征.以醋酸铵和醋酸为助剂,丙酮-水作溶剂,两个锰配合物在室温20℃下能高选择性催化双氧水氧化乙苯制苯乙酮的反应,Q3MnⅢ比Q2MnⅡ具有更高的催化活性和选择性.在优化的反应条件下,乙苯转化率达27%,苯乙酮的选择性>95%;而且催化剂稳定性良好,可循环使用三次.
【Abstract】 Two 5,7-dibromo-8-quinolinolato manganese complexes in tetradentate(Q2MnII) and hexadentate(Q3MnIII) modes were prepared and then characterized by Fourier transform infrared(FT-IR) spectrometry.We found that both Mn complexes,together with NH4OAC and HOAc,efficiently catalyzed the oxidation of ethylbenzene to acetophenone by hydrogen peroxide in an acetone-water medium at 20 ℃.Q3MnIII showed much higher catalytic activity for this reaction than Q2MnII,affording a 27% ethylbenzene conversion and more than 95% selectivity for acetophenone under optimum conditions.Q3MnIII was reused three times without significant deactivation,indicating good stability.
【Key words】 5,7-Dibromo-8-guinolinolato Mn(III) complex； Hexadentate mode； Ethylbenzene； Acetophenone； Selective oxidation；
- 【文献出处】 物理化学学报 ,Acta Physico-Chimica Sinica , 编辑部邮箱 ,2010年10期
- 【分类号】O643.32
- 【被引频次】7
- 【下载频次】168