The selective oxidation of 2,5‐bis(hydroxymethyl)furan(BHMF)in this work was proven as a promising route to produce 2,5‐furandicarboxylic acid(FDCA),an emerging bio‐based building‐block with wide application.Under...The selective oxidation of 2,5‐bis(hydroxymethyl)furan(BHMF)in this work was proven as a promising route to produce 2,5‐furandicarboxylic acid(FDCA),an emerging bio‐based building‐block with wide application.Under ambient pressure,the modified carbon nanotube‐supported Pd‐based catalysts demonstrate the maximum FDCA yield of 93.0%with a full conversion of BHMF after 60 min at 60°C,much superior to that of the traditional route using 5‐hydroxymethylfurfural(HMF)as substrates(only a yield of 35.7%).The participation of PdH_(x) active species with metallic Pd can be responsible for the encouraging performance.Meanwhile,a possible reaction pathway proceeding through 2,5‐diformylfuran(DFF)and 5‐formyl‐2‐furancarboxylic acid(FFCA)as process intermediates is suggested for BHMF route.The present work may provide new opportunities to synthesize other high value‐added oxygenates by using BHMF as an alternative feedstock.展开更多
Synthesis, IR spectra, UV vis spectra and photophysical properties of Gd 3+ , Eu 3+ , Tb 3+ complexes with 3,4 furandicarboxylic acid and 1,10 phenanthroline are reported. Intramolecular energy transfe...Synthesis, IR spectra, UV vis spectra and photophysical properties of Gd 3+ , Eu 3+ , Tb 3+ complexes with 3,4 furandicarboxylic acid and 1,10 phenanthroline are reported. Intramolecular energy transfer process for these complexes is discussed in detail. It is found that the intramolecular energy transfer efficiency depends on the relative positions between the resonance energy levels of the central rare earth ions and the lowest triplet state energies of ligands.展开更多
Biomass represents an abundant and sustainable carbon resource to partially replace fossil resources for producing essential chemicals,alleviating energy and carbon emission issues associated with the traditional chem...Biomass represents an abundant and sustainable carbon resource to partially replace fossil resources for producing essential chemicals,alleviating energy and carbon emission issues associated with the traditional chemical industry.For instance,2,5-furandicarboxylic acid(FDCA)is one of the valuable biomass-derived chemicals,and is an excellent alternative to petroleum-based terephthalic acid for plastics.展开更多
2,5-Furandicarboxylic acid（2,5-FDCA） has been regarded as the ideal bio-based alternative to terephthalic acid（TPA）. In recent years, great efforts have been made to synthesize 2,5-FDCA through the following meth...2,5-Furandicarboxylic acid（2,5-FDCA） has been regarded as the ideal bio-based alternative to terephthalic acid（TPA）. In recent years, great efforts have been made to synthesize 2,5-FDCA through the following methods：（1） oxidation of 5-hydroxymethylfurfural（HMF） in the presence of complex biocatalyst or metallic catalyst;（2） conversion of 2-furoic acid via the well-known Henkel Reaction. Herein, a new strategy for the synthesis of 2,5-FDCA from furan and acetic anhydride under mild condition is reported. The purity of the resulted 2,5-FDCA was above 99.9%. Acetic acid and iodoform generated in the reaction were recyclable and no other harmful by-products were detected. The thus-obtained 2,5-FDCA was applied for the preparation of poly（ethylene furandicarboxylate）（PEF） of high quality in terms of high molecular weight and good appearance.展开更多
文摘The selective oxidation of 2,5‐bis(hydroxymethyl)furan(BHMF)in this work was proven as a promising route to produce 2,5‐furandicarboxylic acid(FDCA),an emerging bio‐based building‐block with wide application.Under ambient pressure,the modified carbon nanotube‐supported Pd‐based catalysts demonstrate the maximum FDCA yield of 93.0%with a full conversion of BHMF after 60 min at 60°C,much superior to that of the traditional route using 5‐hydroxymethylfurfural(HMF)as substrates(only a yield of 35.7%).The participation of PdH_(x) active species with metallic Pd can be responsible for the encouraging performance.Meanwhile,a possible reaction pathway proceeding through 2,5‐diformylfuran(DFF)and 5‐formyl‐2‐furancarboxylic acid(FFCA)as process intermediates is suggested for BHMF route.The present work may provide new opportunities to synthesize other high value‐added oxygenates by using BHMF as an alternative feedstock.
文摘Synthesis, IR spectra, UV vis spectra and photophysical properties of Gd 3+ , Eu 3+ , Tb 3+ complexes with 3,4 furandicarboxylic acid and 1,10 phenanthroline are reported. Intramolecular energy transfer process for these complexes is discussed in detail. It is found that the intramolecular energy transfer efficiency depends on the relative positions between the resonance energy levels of the central rare earth ions and the lowest triplet state energies of ligands.
文摘Biomass represents an abundant and sustainable carbon resource to partially replace fossil resources for producing essential chemicals,alleviating energy and carbon emission issues associated with the traditional chemical industry.For instance,2,5-furandicarboxylic acid(FDCA)is one of the valuable biomass-derived chemicals,and is an excellent alternative to petroleum-based terephthalic acid for plastics.
基金financially supported by the National Natural Science Foundation of China(Nos.51373194 and 51503217)National Key Technology Support Program(No.2015BAD15B08)
文摘2,5-Furandicarboxylic acid（2,5-FDCA） has been regarded as the ideal bio-based alternative to terephthalic acid（TPA）. In recent years, great efforts have been made to synthesize 2,5-FDCA through the following methods：（1） oxidation of 5-hydroxymethylfurfural（HMF） in the presence of complex biocatalyst or metallic catalyst;（2） conversion of 2-furoic acid via the well-known Henkel Reaction. Herein, a new strategy for the synthesis of 2,5-FDCA from furan and acetic anhydride under mild condition is reported. The purity of the resulted 2,5-FDCA was above 99.9%. Acetic acid and iodoform generated in the reaction were recyclable and no other harmful by-products were detected. The thus-obtained 2,5-FDCA was applied for the preparation of poly（ethylene furandicarboxylate）（PEF） of high quality in terms of high molecular weight and good appearance.
