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An Organic Hydride Transfer Reaction of a Ruthenium NAD Model Complex Leading to Carbon Dioxide Reduction

Authors

  • Dr. Hideki Ohtsu,

    1. Institute for Molecular Science, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 (Japan)
    2. Current address: Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Funai Center, Kyoto University Katsura, Nishikyo-ku, Kyoto 615-8530 (Japan)
    3. ALCA, Japan Science and Technology Agency (Japan)
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  • Prof. Koji Tanaka

    Corresponding author
    1. Institute for Molecular Science, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 (Japan)
    2. Current address: Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Funai Center, Kyoto University Katsura, Nishikyo-ku, Kyoto 615-8530 (Japan)
    • Institute for Molecular Science, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787 (Japan)
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  • This work was supported in part by the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT) through Grants-in-Aid for Specially Promoted Research (No. 20002005, K.T.) and for Young Scientists B (No. 23750069, H.O.). We are grateful to Prof. Yasuhiro Uozumi and Dr. Takao Osako, Institute for Molecular Science, for measuring ESI mass spectra of CO2-reduction products.

Abstract

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Ruthenium will fix it: CO2 undergoes reduction to HCO2 when placed over a solution of a ruthenium complex bearing an NADH model ligand 1 (black in right structural formula). The organic hydride transfer is triggered by the addition of benzoate anion, which rapidly forms a complex with 1, a complex that is a stronger reductant than 1. A photocatalytic variant of the reaction using triethanolamine as a sacrificial reagent has also been developed.

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