Silicon‐Assisted Direct Covalent Grafting on Metal Oxide Surfaces: Synthesis and Characterization of Carboxylate N,N′‐Ligands on TiO
<sub>2</sub>
作者:Henri Arzoumanian、Nelson J. Castellanos、Fernando O. Martínez、Edgar A. Páez‐Mozo、Fabio Ziarelli
DOI:10.1002/ejic.200901092
日期:2010.4
accomplished on a TiO 2 matrix with three carboxylic acids: acetic, isonicotinic, and 2,2'-bipyridyl-4,4'-dicarboxylic acids. The N,N'-immobilized ligand was then used for a dioxidomolybdenum entity and tested as such at room temperature and under atmospheric pressure O 2 oxidation of ethylbenzene. All intermediates and grafted species were fully characterized by 13 CMAS NMR spectroscopy, and thermogravimetric
可以通过将三甲基甲硅烷基化的羟基官能团与表面 OH 基团进行酯交换来实现含 OH 分子与金属氧化物表面的简单共价键合。这导致有机分子直接接枝在基质上,伴随着三甲基硅烷醇的形成,三甲基硅烷醇可以很容易地以挥发性六甲基二硅氧烷和水的形式消除。这是在具有三种羧酸的 TiO 2 基质上完成的:乙酸、异烟碱和 2,2'-联吡啶-4,4'-二羧酸。然后将N,N'-固定的配体用于二氧化钼实体,并在室温和大气压下进行乙苯的O 2 氧化测试。所有中间体和接枝物均通过 13 CMAS NMR 光谱、热重分析和元素分析进行充分表征。