A Chromium Hydroxide/MIL‐101(Cr) MOF Composite Catalyst and Its Use for the Selective Isomerization of Glucose to Fructose. Issue 18 (23rd March 2018)

• Record Type: Journal Article
• Authors: Guo, Qiang; Ren, Limin; Kumar, Prashant; Cybulskis, Viktor J.; Mkhoyan, K. Andre; Davis, Mark E.; Tsapatsis, Michael
• Is Part Of: Angewandte Chemie international edition. Volume 57:Issue 18(2018)
• Page Start: 4926
• Page End: 4930
• Publication Date: 2018-03-23
• Subjects: chromium hydroxide -- fructose -- heterogeneous catalysis -- isomerization -- metal–organic frameworks; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201712818
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: A metal–organic framework (MOF)‐based catalyst, chromium hydroxide/MIL‐101(Cr), was prepared by a one‐pot synthesis method. The combination of chromium hydroxide particles on and within Lewis acidic MIL‐101 accomplishes highly selective conversion of glucose to fructose in the presence of ethanol, matching the performance of optimized Sn‐containing Lewis acidic zeolites. Differently from zeolites, NMR spectroscopy studies with isotopically labeled molecules demonstrate that isomerization of glucose to fructose on this catalyst, proceeds predominantly via a proton transfer mechanism. Abstract : Sugar rush : Cr(OH)3 inter‐grown with MIL‐101 is demonstrated to be a highly selective catalyst for glucose isomerization to fructose. Although isomerization proceeds mainly by a proton‐transfer mechanism, the new catalyst matches the performance of optimized Lewis acid zeolites.