An iron（Ⅲ）-catalyzed selective oxidation of 5-HMF to 2,5-DFF in air at room temperature was developed.This approach gives 2,5-DFF with good selectivity and yields. Additionally, a two-step process was developed for...An iron（Ⅲ）-catalyzed selective oxidation of 5-HMF to 2,5-DFF in air at room temperature was developed.This approach gives 2,5-DFF with good selectivity and yields. Additionally, a two-step process was developed for the oxidation of 2,5-DFF to 2,5-FDCA at remarkably high substrate concentrations. This work demonstrates unequivocally the great potential of iron as a cheap and earth-abundant catalyst for the development of new protocols for the conversion of biomass to value-added chemicals.展开更多
The structures and catalytic performances of V_2O_5, Mg_3V_2O_8 and V/MgO catalysts have been correlated by means of XRD, FTIR, TPR and flow micro-reactor tests. The postulation about active site has been made. Based ...The structures and catalytic performances of V_2O_5, Mg_3V_2O_8 and V/MgO catalysts have been correlated by means of XRD, FTIR, TPR and flow micro-reactor tests. The postulation about active site has been made. Based on it, better catalysts have been first prepared via grafting and modification with Sb which are better than that via impregnation.展开更多
The stabilization of active molecules is significantly important for chemistry,especially for the bioactive molecules.In this work,we report the synthesis and characterization of three tetrahedral Fe_(4)L_(6) cages,wh...The stabilization of active molecules is significantly important for chemistry,especially for the bioactive molecules.In this work,we report the synthesis and characterization of three tetrahedral Fe_(4)L_(6) cages,which are water-soluble and functionalized with or without PEG chains.All cages can physically trap NO molecules in their cavities to prevent a reaction with O_(2).Single-crystal X-ray diffraction(SCXRD),Griess assay,electron paramagnetic resonance(EPR)spectroscopy,and fluorescence assay demonstrate that NO molecules were encapsulated and stabilized by these cage molecules through the formation of host-vip supramolecules.These NO-loaded cages show high antibacterial activities for inhibiting Staphylococcus aureus and Escherichia coli,providing a convenient method for making antibiotic agents.Moreover,these PEG-functionalized cages exhibit excellent biocompatibility,providing a new strategy for developing materials for NO delivery in biomedical applications.展开更多
基金the National Basic Research Program of China (Nos. 2013CB228103, 2012CB215306)NNSFC (Nos. 21472033, 21325208, 21172209)+3 种基金FRFCU (No. WK2060190025)SRFDP (No. 20123402130008)CAS (No. KJCX2-EW-J02)Fok Ying Tung Education Foundation for the financial support
文摘An iron（Ⅲ）-catalyzed selective oxidation of 5-HMF to 2,5-DFF in air at room temperature was developed.This approach gives 2,5-DFF with good selectivity and yields. Additionally, a two-step process was developed for the oxidation of 2,5-DFF to 2,5-FDCA at remarkably high substrate concentrations. This work demonstrates unequivocally the great potential of iron as a cheap and earth-abundant catalyst for the development of new protocols for the conversion of biomass to value-added chemicals.
文摘The structures and catalytic performances of V_2O_5, Mg_3V_2O_8 and V/MgO catalysts have been correlated by means of XRD, FTIR, TPR and flow micro-reactor tests. The postulation about active site has been made. Based on it, better catalysts have been first prepared via grafting and modification with Sb which are better than that via impregnation.
基金supported by the National Natural Science Foundation of China(Nos.22171106,22431006,22150004 and 22375075)Guangdong Major Project of Basic and Applied Basic Research(Nos.2023B0303000013,2019B030302009)+1 种基金Guangdong Natural Science Foundation(No.2022A1515011937)Jinan University.
文摘The stabilization of active molecules is significantly important for chemistry,especially for the bioactive molecules.In this work,we report the synthesis and characterization of three tetrahedral Fe_(4)L_(6) cages,which are water-soluble and functionalized with or without PEG chains.All cages can physically trap NO molecules in their cavities to prevent a reaction with O_(2).Single-crystal X-ray diffraction(SCXRD),Griess assay,electron paramagnetic resonance(EPR)spectroscopy,and fluorescence assay demonstrate that NO molecules were encapsulated and stabilized by these cage molecules through the formation of host-vip supramolecules.These NO-loaded cages show high antibacterial activities for inhibiting Staphylococcus aureus and Escherichia coli,providing a convenient method for making antibiotic agents.Moreover,these PEG-functionalized cages exhibit excellent biocompatibility,providing a new strategy for developing materials for NO delivery in biomedical applications.
