Iridium complexes catalysed the selective dehydrogenation of glucose to gluconic acid in water

Borja, P. ; Vicent, C. ; Baya, M. (Universidad de Zaragoza) ; Garcia, H. ; Mata, J.A.

Resumen: We describe an unprecedented catalytic dehydrogenation of glucose by homogeneous catalysts. Iridium(iii) complexes containing the fragment [Cp*Ir(NHC)](2+) (NHC = N-heterocyclic carbene ligand) are shown to be very active and highly selective catalysts for the dehydrogenation of glucose to gluconic acid and molecular hydrogen. Glucose is converted to gluconic acid at a catalyst loading of 2 mol%, at reflux in water, without additives and with a selectivity of over 95%. Experimental evidence obtained by H-1 NMR spectroscopy and mass spectrometry (ESI/MS) reveals the formation of iridium coordinated to glucose and gluconic acid species. A plausible mechanism is proposed, based on the experimental evidence and supported by DFT calculations.

Idioma: Inglés

DOI: 10.1039/c8gc01933a

Año: 2018

Publicado en: GREEN CHEMISTRY 20, 17 (2018), 4094-4101
ISSN: 1463-9262

Factor impacto JCR: 9.405 (2018)

Categ. JCR: GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY rank: 2 / 35 = 0.057 (2018) - Q1 - T1
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 20 / 172 = 0.116 (2018) - Q1 - T1

Factor impacto SCIMAGO: 2.517 - Pollution (Q1) - Environmental Chemistry (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E21
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CTQ2015-67461-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CTQ2015-69153-C2-1-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CTQ2015-69153-C2-2-R

Tipo y forma: Article (Published version)

Área (Departamento): Área Química Inorgánica (Dpto. Química Inorgánica)