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Controlled Photocat...
Controlled Photocatalytic Hydrocarbon Oxidation by Uranyl Complexes
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- Arnold, Polly L. (författare)
- Univ Edinburgh, EaStCHEM Sch Chem, Joseph Black Bldg, Edinburgh EH9 3FJ, Midlothian, Scotland
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- Purkis, Jamie M. (författare)
- Univ Edinburgh, EaStCHEM Sch Chem, Joseph Black Bldg, Edinburgh EH9 3FJ, Midlothian, Scotland
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- Rutkauskaite, Ryte (författare)
- Univ Edinburgh, EaStCHEM Sch Chem, Joseph Black Bldg, Edinburgh EH9 3FJ, Midlothian, Scotland
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- Kovacs, Daniel (författare)
- Uppsala universitet,Molekylär biomimetik
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- Love, Jason B. (författare)
- Univ Edinburgh, EaStCHEM Sch Chem, Joseph Black Bldg, Edinburgh EH9 3FJ, Midlothian, Scotland
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- Austin, Jonathan (författare)
- Natl Nucl Lab, 5th Floor,Chadwick House,Birchwood Pk, Warrington WA3 6AE, Cheshire, England
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(creator_code:org_t)
- 2019-02-28
- 2019
- Engelska.
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Ingår i: ChemCatChem. - : Wiley-VCH Verlagsgesellschaft. - 1867-3880 .- 1867-3899. ; 11:16, s. 3786-3790
- Relaterad länk:
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https://www.pure.ed....
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Controlled, photocatalytic C-H bond activations are key reactions in the toolkits of the modern synthetic chemist. While it is known that the uranyl(VI) ion, [(UO2)-O-VI](2+), the environmentally dominant form of uranium, is photoactive, most literature examines its luminescent properties, neglecting its potential synthetic utility for photocatalytic C-H bond cleavage. Here, we synthesise and fully characterise an air-stable and hydrocarbon-soluble uranyl phenanthroline complex, [(UO2)-O-VI(NO3)(2)(Ph(2)phen)], U-Ph2phen, and demonstrate that it can catalytically abstract hydrogen atoms from a variety of organic substrates under visible light irradiation. We show that the commercially available parent complex, uranyl nitrate ([(UO2)-O-VI(NO3)(2)(OH2)(2)]center dot 4H(2)O; U-NO3), is also competent, but from electronic spectroscopy we attribute the higher rates and selectivity of U-Ph2phen to ligand-mediated electronic effects. Ketones are selectively formed over other oxygenated products (alcohols, etc.), and the catalytic oxidation of substrates containing a benzylic C-H position is particularly improved for U-Ph2phen. We also show uranyl-mediated photocatalytic C-C bond cleavage in a model lignin compound for the first time.
Ämnesord
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- Actinides
- C-H bond activation
- fluorescence spectroscopy
- photocatalysis
- uranium
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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