羧化
钌
光催化
化学
光化学
乙酰丙酮
激进的
纳米颗粒
电子顺磁共振
二氧化碳
羧酸
无机化学
催化作用
有机化学
材料科学
纳米技术
物理
核磁共振
作者
Tomasz Baran,Angela Dibenedetto,Michele Aresta,Krzysztof Kruczała,Wojciech Macyk
标识
DOI:10.1002/cplu.201300438
摘要
Abstract Photocatalytic carboxylation of acetylacetone with carbon dioxide has been performed by using ZnS‐based photocatalysts. The formation of two isomeric carboxylic acids, as proven by IR and 13 C NMR spectroscopy, was observed. The reaction yield was enhanced after deposition of ruthenium nanoparticles on ZnS. The reaction encompasses ruthenium‐mediated one‐electron reduction of CO 2 to CO 2 .− with electrons from the conduction band of ZnS and one‐hole oxidation of acetylacetone to the relevant radical. Coupling of photogenerated radicals leads to the formation of carboxylic acids. Generation of CO 2 .− has been confirmed by spin‐trapping EPR measurements. The process described herein may find applications for the solar‐light‐driven green synthesis of C n +1 carboxylic compounds from C n substrates by utilising carbon dioxide.
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