title: Amino- and Sulfo-Bifunctionalized Metal-Organic Frameworks: One-Pot Tandem Catalysis and the Catalytic Sites.
abstract: New MIL-101 metal-organic frameworks (MOFs) dually functionalized with amino and sulfo groups were fabricated by postsynthetic modification and used to catalyze one-pot deacetalization-Knoevenagel condensation. We proved that the MOFs take the zwitterionic form, with the catalytic acid site being the ammonium group rather than the sulfo one. The acid and base concentrations in the materials are correlated, and the ratio can be readily tuned to achieve optimal catalytic performance.
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, College of Chemistry and Molecular Engineering, East China Normal University , Shanghai 200062, P. R. China.
authors.forename: Hui
authors.initials: H
authors.lastname: Liu
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, College of Chemistry and Molecular Engineering, East China Normal University , Shanghai 200062, P. R. China.
authors.forename: Fu-Gui
authors.initials: FG
authors.lastname: Xi
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, College of Chemistry and Molecular Engineering, East China Normal University , Shanghai 200062, P. R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Sun
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, College of Chemistry and Molecular Engineering, East China Normal University , Shanghai 200062, P. R. China.
authors.forename: Ning-Ning
authors.initials: NN
authors.lastname: Yang
authors.affiliation: Shanghai Key Laboratory of Green Chemistry and Chemical Processes, College of Chemistry and Molecular Engineering, East China Normal University , Shanghai 200062, P. R. China.
authors.forename: En-Qing
authors.initials: EQ
authors.lastname: Gao