Photocatalytic Carboxylation of Organic Substrates with Carbon Dioxide at Zinc Sulfide with Deposited Ruthenium Nanoparticles

被引:54
作者
Baran, Tomasz [1 ,2 ]
Dibenedetto, Angela [2 ,3 ]
Aresta, Michele [3 ]
Kruczala, Krzysztof [1 ]
Macyk, Wojciech [1 ]
机构
[1] Jagiellonian Univ, Fac Chem, PL-30060 Krakow, Poland
[2] Univ Bari, Dept Chem, I-70125 Bari, Italy
[3] Interuniv Consortium Chem React & Catalysis, I-70126 Bari, Italy
关键词
carbon dioxide fixation; CC coupling; nanomaterials; photochemistry; semiconductors; VISIBLE-LIGHT; HETEROGENEOUS PHOTOCATALYSIS; INORGANIC RADICALS; GRAPHENE OXIDE; CO2; REDUCTION; PHOTOREDUCTION; OXIDATION; METHANOL; GROWTH;
D O I
10.1002/cplu.201300438
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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 (CNMR)-C-13 spectroscopy, was observed. The reaction yield was enhanced after deposition of ruthenium nanoparticles on ZnS. The reaction encompasses ruthenium-mediated one-electron reduction of CO2 to CO2.- 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 CO2.- has been confirmed by spin-trapping EPR measurements. The process described herein may find applications for the solar-light-driven green synthesis of Cn+1 carboxylic compounds from C-n substrates by utilising carbon dioxide.
引用
收藏
页码:708 / 715
页数:8
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