Chemistry, Photochemistry, and Electrochemistry of Carbon Dioxide and Organometallic Radicals

无机、生物无机和有机金属项目的这一奖项支持普渡大学化学系的Clifford Kubiak博士在设计和合成新化合物方面的持续工作，这些化合物将激活和减少二氧化碳。在这个项目中，库比亚克将研究通过偶联二氧化碳分子形成碳-碳键的方法。双核过渡金属络合物将作为提供偶联反应所需电子的手段进行测试。制备了单键Ir、Rh、Ni和铂的配合物，并用激光瞬时吸收光谱技术进行了光解。金属-金属键的光致断裂将为键的形成提供两个电子。这些络合物被设计成形成自由基瞬变，这些自由基瞬变可以“调节”二氧化碳的减少。光产生的自由基将使用由这笔赠款支持的红外探测器进行表征。该项目基于过去的发现，即某些双核化合物的结构变化使其在光致电子转移反应中有效。

This award in the Inorganic, Bioinorganic, and Organometallic Program supports the continued work of Dr. Clifford Kubiak of the Department of Chemistry, Purdue University, on the design and synthesis of new compounds which will activate and reduce carbon dioxide. In this project, Kubiak will study ways to form carbon-carbon bonds by coupling carbon dioxide molecules. Binuclear transition metal complexes will be tested as means to provide the electrons needed for the coupling reaction. Single-bonded Ir, Rh, Ni and Pt complexes will be prepared and photolyzed by laser transient absorbance techniques. The photoinduced cleavage of the metal-metal bond will provide two electrons for bond formation. The complexes are designed to form radical transients which are "tuned" for carbon dioxide reduction. The photogenerated radicals will be characterized using an infrared detector supported by this grant. The project is based on past findings that structural changes in certain binuclear compounds make them effective in photoinduced electron transfer reactions.