Postsynthetic acid modification of amino-tagged metal-organic frameworks:Structure-function relationship for catalytic 5-hydroxymethylfurfural synthesis  

作　　者：Yao Zhong Cuiying Huang Lijie Li Qiang Deng Jun Wang Zheling Zeng Shuguang Deng 

机构地区：[1]Key Laboratory of Poyang Lake Environment and Resource Utilization(Nanchang University)of the Ministry of Education,School of Resource,Environmental and Chemical Engineering,Nanchang University,Nanchang 330031,China [2]School for Engineering of Matter,Transport and Energy,Arizona State University,Arizona 85287,United States

出　　处：《Chinese Journal of Chemical Engineering》2022年第9期245-252,共8页中国化学工程学报（英文版）

基　　金：support from the National Natural Science Foundation of China(21878138,21666021,and 21706112);the Postdoctoral Science Foundation of China(2017M622104,2018T110660)。

摘　　要：Developing an efficient and selective catalyst for the dehydration of fructose to 5-hydroxymethylfurfural(HMF)is significant for biomass conversion.Herein,a metal-organic framework(MOF)with acidity and strong hydrophobicity is first reported by the condensation of amino-tagged MOFs with mercapto carboxylic acids and subsequent oxidation.The hydrophobic acidic MOFs possess acid densities ranging from 0.2-1.0 mmol·g^(-1),H_(2)O contact angles of 114°-125°,and specific surface areas above260 m^(2)·g^(-1).Compared to the methyl sulfo-functionalized MOF,the benzene sulfo-functionalized MOF with a strong hydrophobicity shows much higher activity and selectivity for the conversion of fructose to 5-hydroxymethylfurfural.In particular,2.99%(mass)UiO-PhSO_(3)H shows the best catalytic performance with a 90.4%HMF yield due to its suitable hydrophobicity and abundant acidic sites.Moreover,the catalyst shows great stability after recycling for 5 runs.This work provides an interesting design strategy for the preparation of hydrophobic acidic MOFs and shows the powerful synergistic effect of acidity and hydrophobicity.

关 键 词：Metal-organic framework 5-HYDROXYMETHYLFURFURAL FRUCTOSE ACIDITY HYDROPHOBICITY 

分 类 号：TQ251.11[化学工程—有机化工] TQ426