Journal
CHEMCATCHEM
Volume 13, Issue 24, Pages 5156-5165Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.202101442
Keywords
Carbon Nanotubes; Ruthenium complexes; Functionalization; Transfer Hydrogenation; Catalysis
Categories
Funding
- European Research Council (ERC-CoG) [647550]
- Spanish Government [IJC2019-042157-I, FJCI-2017-33129, RTI2018-095038-B-I00]
- Comunidad de Madrid
- European Structural Funds [S2018/NMT-4367]
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A half-sandwich ruthenium-p-cymene organometallic complex has been immobilized on the sidewalls of Single Walled Carbon Nanotubes (SWNT) through a stepwise covalent chemistry protocol, enabling efficient transfer hydrogenation of ketones to alcohols. The hybrid material shows high activity, recyclability and improved performance compared to related homogeneous catalysts due to the covalent bond between the metal and the material, achieving high turnover frequencies.
A half-sandwich ruthenium-p-cymene organometallic complex has been immobilized at Single Walled Carbon Nanotubes (SWNT) sidewalls through a stepwise covalent chemistry protocol. The introduction of amino groups by means of diazonium-chemistry protocols leads the grafting at the outer walls of the nanotubes. This hybrid material is active in the transfer hydrogenation of ketones to yield alcohols, using as hydrogen source 2-propanol. SWNT-NH2-Ru presents a broad scope, performing the reaction under aerobic conditions and can be recycled over 9 consecutive reaction runs without losing activity or leaching ruthenium out. Comparison of the activity with related homogeneous catalysts reveals an improved performance due to the covalent bond between the metal and the material, achieving turnover frequencies as high as 192774 h(-1).
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