Abstract
AbstractConversion of biomass into high value products via environmentally benign processes remains a challenging task for chemists. Photocatalytic partial oxidation of the biochemical 5‐hydroxymethylfurfural (HMF) to 2,5‐diformylfuran (DFF) has attracted much attention as DFF is known to be a pivotal precursor in the biochemical industry. Previously, this reaction has been catalyzed with transition metal based catalytic systems in organic solvents. Herein, we report the use of a covalent triazine framework (CTF) as a highly stable and porous organic photoactive polymer for the photocatalytic partial oxidation of HMF to DFF in water, using molecular oxygen as a green oxidant. The photocatalyst showed high efficiency in affording DFF as the target product with good reusability.
Highlights
Under those conditions, selectivity of DFF usually ranges from to 99 %
Conjugated porous polymer-based heterogeneous photocatalysts have lately demonstrated their broad use in organic photoredox reactions
Photocatalytic partial oxidation of the biochemical 5hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF) has attracted much attention as DFF is known to be a pivotal precursor in the biochemical industry
Summary
Cyrine Ayed,[a, b] Wei Huang,[a] Gönül Kizilsavas,[a] Katharina Landfester,*[a] and. under those conditions, selectivity of DFF usually ranges from to 99 %. Cyrine Ayed,[a, b] Wei Huang,[a] Gönül Kizilsavas,[a] Katharina Landfester,*[a] and. Interest has increasingly turned to water as the solvent for chemical reactions owning to its low-cost, availability and non-toxicity.[13] we report the use of a thiophene containing covalent triazine framework for visible-light promoted partial oxidation of HMF to DFF in aqueous medium. Biomass is a highly abundant and renewable organic carbon resource in nature It can be converted as chemical feedstock into high value compounds, reducing the heavy dependence on unsustainable petroleum-based resources.[1] As example, 5-hydroxymethylfurfural (HMF), which is usually obtained by dehydration product of C6-based carbohydrates (such as glucose and fructose), can be partially oxidized to 2,5diformylfuran (DFF).[2] As a valuable precursor, DFF can be further used for a vast number of important materials as various poly-Schiff bases, furan-based biopolymers, intermediates of pharmaceuticals, antifungal agents, organic conductors, cross-linking agents of poly (vinyl alcohol), and for different applications as in photography, analytical chemistry, metal electroplating, and electrooptical devices.[3] Currently, DFF is [a] C.
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