Bifunctional Tin Porous Coordination Polymer For Catalytic Conversion Of Glucose To 5-hydroxymthyfurfural

5-hydroxymethylfurfural(HMF)is an important platform compound which can be converted to numerous value-added chemicals with a wide range of applications.Glucose is the most attractive biomass-derived carbohydrates as a starting material for the production of HMF due to the economic prospect.The dehydration of glucose into HMF generally results in lower HMF yields.An efficient catalytic system is required for the synthesis of HMF from glucose.Bifunctional Lewis/Br(?)nsted acid catalysts were investigated as the catalysts of the one-pot glucose to HMF conversion through a tandem reaction sequence involving isomerization and dehydration.In this work,SnPCP were prepared by solvothermal method using 5-sulfoisophthalic acid(5-SIP)as ligand.The composite of MnO2@PDA@SnPCP was further prepared on polydopamine-coated MnO2(MnO2@PDA).SnPCP and MnO2@PDA@SnPCP are bifunctional catalysts with both Lewis acid and Br(?)nsted acid active sites due to the presence of sulfonic acid and coordination metal tin.The catalysts were characterized with by FTIR,XPS,N2 adsorption-desorption and pyridine FTIR.SnPCP and MnO2@PDA@SnPCP have been used as the catalyst for catalyzing the conversion of glucose into HMF.HMF was obtained in 39.4%yield at 150 ? within 5 h,when catalyzed with SnPCP.MnO2@PDA was found to promote the conversion of glucose to HMF.The synergistic effect of MnO2@PDA and SnPCP achieved HMF yields of 55.8%in DMSO.Consecutive use of SnPCP and MnO2@PDA@SnPCP demonstrated that after 5 cycles,the activity loss is not significant in terms of the HMF yield and glucose conversion.