Multiphase Reaction Medium Including Dense Phase Carbon Dioxide and Water for Rate Acceleration and Selectivity Control of Synthetic Organic Reactions

在加氢反应、光催化反应等方面，以密相CO2和/或水为主要反应介质的多相反应已经得到了广泛的应用，对这些反应的实用性进行了考察，并对CO2和水的物理化学作用进行了研究。所研究的反应包括腈选择性加氢制伯胺、苯酚加氢、光催化分解水等。原位高压傅里叶变换红外光谱法被用来检查二氧化碳和有机基质之间的相互作用和负载的催化金属颗粒和反应物种（一氧化碳形成的二氧化碳和氢，有机基质，水）之间的那些。有观察到的反应速率的加速，产品的选择性的修改，和/或抑制催化剂失活的多相介质中的那些反应。二氧化碳和水的化学作用取决于所考察的化学反应。

Multiphase reaction media including dense phase carbon dioxide and/or water have been applied for hydrogenation reactions, photocatalytic reactions, and so on. The practical usefulness of those reactions was examined and the physical and chemical functions of carbon dioxide and water were investigated. The reactions studied include selective hydrogenation of nitriles to primary amines, hydrogenation of phenol, photocatalytic water splitting, and others. In situ high pressure Fourier transform infrared spectroscopy was used to examine the interactions between carbon dioxide and organic substrates and those between supported catalytic metal particles and reacting species (carbon monoxide formed from carbon dioxide and hydrogen, organic substrates, water). There were observed acceleration of reaction rate, modification of product selectivity, and/or suppression of catalyst deactivation for those reactions in the multiphase media. The chemical functions of carbon dioxide and water d pended on the chemical reactions examined.