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Quantitative determination of Pt- catalyzed D-glucose oxidation products using 2D NMR

Armstrong, Robert David, Hirayama, Jun, Knight, David W and Hutchings, Graham J. 2018. Quantitative determination of Pt- catalyzed D-glucose oxidation products using 2D NMR. ACS Catalysis 10.1021/acscatal.8b03838
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Quantitative correlative 1H – 13C NMR has long been discussed as a potential method for quantifying the components of complex reaction mixtures. Here we show that quantitative HMBC NMR can be applied to understand the complexity of the catalytic oxidation of glucose to glucaric acid, which is a promising bio- derived precursor to adipic acid, under aqueous aerobic conditions. It is shown through 2D NMR analysis that the product streams of this increasingly studied reaction contain lactone and dilactone derivatives of acid products, including glucaric acid, which are not observable/ quantifiable using traditional chromatographic techniques. At 98 % glucose conversion, total C6 lactone yield reaches 44 %. Furthermore, a study of catalyst stability shows all Pt catalysts to undergo product- mediated chemical leaching. Through catalyst development studies, it is shown that sequestration of leached Pt can be achieved through use of carbon supports.

Item Type: Article
Date Type: Published Online
Status: In Press
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: American Chemical Society
ISSN: 2155-5435
Funders: EPSRC
Date of First Compliant Deposit: 3 December 2018
Date of Acceptance: 30 November 2018
Last Modified: 06 Dec 2018 21:40

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