Iridium complexes catalysed the selective dehydrogenation of glucose to gluconic acid in water
| Autor: | Hermenegildo García, Pilar Borja, Cristian Vicent, Jose A. Mata, Miguel Baya |
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| Přispěvatelé: | Universidad Jaime I, Ministerio de Economía y Competitividad (España), Diputación General de Aragón, European Commission, Borja, Pilar [0000-0001-6616-4399], Baya, Miguel [0000-0002-2492-625X], García, Hermenegildo [0000-0002-9664-493X], Mata, José A. [0000-0001-9310-2783], Borja, Pilar, Baya, Miguel, García, Hermenegildo, Mata, José A. |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
inorganic chemicals
Gluconic acid chemistry.chemical_element 010402 general chemistry Mass spectrometry 01 natural sciences Medicinal chemistry Catalysis chemistry.chemical_compound QUIMICA ORGANICA NMR spectroscopy Environmental Chemistry Dehydrogenation Iridium Iridium complexes 010405 organic chemistry Ligand Reflux in water Pollution 0104 chemical sciences Catalytic dehydrogenation Glucose Molecular hydrogen chemistry Selectivity Carbene Mass spectrometry (ESI/M |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia Repositori Universitat Jaume I Universitat Jaume I Zaguán. Repositorio Digital de la Universidad de Zaragoza |
| Popis: | 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 1H 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. The authors thank the MINECO (Severo Ochoa, CTQ2015-69153-C2-1-R, CTQ2015-69153-C2-2-R and CTQ2015-67461-P), Diputación General de Aragón (Grupo Consolidado E21) and Universitat Jaume I (P1.1B2015-09) for financial support. P. Borja thanks the Universitat Jaume I for a postdoctoral grant. |
| Databáze: | OpenAIRE |
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