Nanobelt α-CuV₂O₆ with hydrophilic mesoporous poly(ionic liquid): a binary catalyst for synthesis of 2,5-diformylfuran from fructose

Abstract

The task-specific binary catalyst composed of nanobelt α-CuV2O6 and hydrophilic mesoporous poly(ionic liquid) exhibited high efficiency and stable activity in the direct synthesis of 2,5-diformylfuran (DFF) from fructose.

Fabrication of Trifunctional Polyoxometalate‐Decorated Chitosan Nanofibers for Selective Production of 2,5‐Diformylfuran

“…Compared with the production of DFF from HMF,t he direct one-pot conversion of monosaccharides (fructosea nd glucose) into DFF with high yield is desirable and still ag reat challenge, [22,41,42] which involves the selectivedehydration of carbohydratesi nto HMF over acid sites and the consequent oxidation of HMF to DFF over redox sites. [22] However,p roduction of DFF has often been obtained in one pot and two steps, including the acidification and oxidation reaction, whichf aces a major drawback in the formation of humins and other undesired byproducts owing to the coexistence of acid and redox sites.…”

“…DFF is av ersatile compound that can be used as ap recursori n the synthesis of functional polymers, [14] pharmaceuticals, [15] antifungal agents, [16] furan-urea resins, [17] heterocyclic ligands, [18] and other value-added products.H owever,s everal kinds of furan compounds such as FDCA, 5-formyl-2-furancarboxylic acid (FFCA), 5-hydroxymethyl-2-furancarboxylic acid (HMFCA), accompanied with DFF,c an possibly be formed during HMF oxidation. [22][23][24][25] POMs containing vanadium also show potentialf or the oxidation of HMF to give as eries of products including DFF [9] andM A: [7] Cs 3 HPMo 11 VO 40 gave 99 %c onversion and 99 %y ield of DFF at 110 8Cf or 6hin DMSO under N 2 and O 2 in ao ne-pot,t wo-stepp rocess;H 5 PMo 10 V 2 O 40 presented 100 %c onversion and 64 %y ield of MA at 90 8Cf or 8h in Trifunctional catalysts based on polyoxometalate (POM)d ecorating chitosan nanofibers (H 5 PMo 10 V 2 O 40 /chitosan nanofibers, abbreviated as HPMoV/CS-f), synthesized by using the electrospinningm ethod, realized highly efficient oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF).D ecorating chitosann anofibers with POMs generated enhanced catalytic activity by merging their uniquei ndividual properties of redox ability,B rønsted acidity,b asicity,a nd nanofiber structure with higher surface area. To date, both homogeneous and heterogeneous metal catalysts have been explored for the oxidation of HMF to DFF with various oxidants.…”

Poly(ionic liquid) composites

“…Such surface wettabilitycontrolled adsorption features inhibited the oxidation of fructose and facilitated the transfer of HMF to the oxidative sites on a-CuV 2 O 6 , and thus, its timely conversion into the final product. 121 Similarly, the PIL-metal salt hybrid provides an ideal platform to produce diverse binary catalysts for taskspecific catalysis. 75 For example, introducing CrCl 3 Á6H 2 O into SO 3 H-functionalized poly(1-vinyl-3-propanesulfonylimidazolium) (PVMPS) with PW 12 O 40 and Cl as counteranions provides bifunctional catalysts carrying Brønsted/Lewis acidic groups, which effectively convert biomass including fructose, glucose, and cellulose into HMF in the presence of DMSO-mediated solvents.…”

Porous Polyelectrolytes: The Interplay of Charge and Pores for New Functionalities

“…[104] Theg roups of Wang,[69c] Xiao, [69e] and Bordiga [69b] copolymerized several IL monomers with divinylbenzene to prepare mesoporous PILs that function as asolid-liquid heterophase catalyst. Interestingly,these mesoporous PILs have good accessibility to organic compounds and resistance to CO 2 /H 2 O. Thec atalytic function of the porous PIL family was further expanded by loading with palladium nanoparticles or a-CuV 2 O 6 nanobelts for the oxidation of benzyl alcohol [105] or the direct catalytic synthesis of 2,5-diformylfuran from fructose, [106] respectively.…”