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OALib Journal期刊
ISSN: 2333-9721
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分子印迹聚合物负载Fe(III)催化剂的底物识别性能
DOI: 10.1016/S1872-2067(12)60624-X, PP. 1589-1598
Keywords: 分子印迹聚合物,铁(III)催化剂,苯甲醇衍生物,催化氧化,底物识别
Abstract:
？分别以o-,m-和p-硝基苯甲醇与FeCl3的配合物为模板分子,丙烯酰胺为功能单体,二甲基丙烯酸乙二醇酯为交联剂,采用本体聚合法制备了三种Fe(III)含量相同的分子印迹聚合物(MIP)o-Fe(III)-MIP,m-Fe(III)-MIP和p-Fe(III)-MIP.并采用扫描电镜、N2吸附-脱附及红外光谱等方法对催化剂结构进行了表征.在以水为溶剂,过氧化氢(30%)为氧化剂的苯甲醇衍生物氧化反应中,该类催化剂表现出优异的催化活性和独特的底物识别性能.当以p-Fe(III)-MIP为催化剂时,p-硝基苯甲醇的转化率达到80%,而在其他两个催化剂上均低于58%.这表明Fe(III)-MIP催化剂结构中具有与底物分子匹配的印迹空腔与识别位点,对底物分子表现出专一识别性,因而提高了催化剂对底物的选择性.
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