Organometallic Chemistry of Carbon Dioxide: Organometallic Chemistry in Unusual Media

该奖项在无机，生物无机和有机化学 项目支持Donald J. Darensbourg博士对二氧化碳的研究 德克萨斯农工大学化学系教授 的主要重点 研究的是发生在 二氧化碳和环氧化物共聚形成聚碳酸酯。 收集到的信息将用于设计更具选择性的催化剂， 这些反应。 钨、锌、镉和铜的络合物将是 用于探测醇盐络合物的不稳定性，环氧化物络合 以及随后与配位羧酸酯的偶联，以及催化剂活性 和选择性。 此外，金属催化共聚 二氧化碳和氮丙啶反应形成聚氨酯将是 探索，和二氧化碳的反应性与协调和 电子不饱和金属羰基衍生物，其包含 将研究π-供体配体。 两相催化和 超临界二氧化碳将用于催化剂分离， 在这些均相过程中的基质和产物。 二氧化碳是用于各种用途的潜在碳源。 还有， 它可以作为环境友好的替代溶剂， 挥发性有机化合物 在这项研究中，将设计催化剂， 对于使用二氧化碳作为源材料的反应， 合成有用的聚合物。 此外，超临界二氧化碳 将作为溶剂进行测试，以进行一些分离， 过程

This award in the Inorganic, Bioinorganic, and Organometallic Chemistry Program supports research on carbon dioxide by Dr. Donald J. Darensbourg of the Chemistry Department, Texas A&M University. The main focus of the research is on the fundamental processes occurring during copolymerization of carbon dioxide and epoxides to form polycarbonates. Information gleaned will be used to design more selective catalysts for those reactions. Tungsten, zinc, cadmium, and copper complexes will be used to probe the lability of alkoxide complexes, epoxide complexation and subseqent coupling with ligated carboxylates, and catalyst activity and selectivity. In addition, metal catalyzed copolymerization reactions of carbon dioxide and aziridines to form polyurethane will be explored, and reactivity of carbon dioxide with coordinatively and electronically unsaturated metal carbonyl derivatives that contain pi-donor ligands will be investigated. Biphasic catalysis and supercritical carbon dioxide will be used for catalyst separation from the substrate and the product in these homogeneous processes. Carbon dioxide is a potential source of carbon for various uses. Also, it can serve as an environmentally-benign replacement solvent for volatile organic compounds. In this study, catalysts will be designed for reactions in which carbon dioxide is used as a source material for synthesis of useful polymers. In addition, supercritical carbon dioxide will be tested as a solvent for some of the separations needed in the process.