Chemical Research in Chinese Universities ›› 2022, Vol. 38 ›› Issue (5): 1301-1307.doi: 10.1007/s40242-022-2148-0

• Articles • Previous Articles    

Coordinating Zirconium Nodes in Metal-Organic Framework with Trifluoroacetic Acid for Enhanced Lewis Acid Catalysis

WANG Wenyang1,2, LIU Hanlin2,3, YANG Caoyu2,3, FAN Ting2, CUI Chengqian2,3, LU Xiaoquan4, TANG Zhiyong2,3, LI Guodong2,3   

  1. 1. Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China;
    2. CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China;
    3. School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China;
    4. Key Laboratory of Bioelectrochemistry &
    Environmental Analysis of Gansu Province, College of Chemistry &
    Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
  • Received:2022-04-21 Online:2022-10-01 Published:2022-10-08
  • Contact: LI Guodong, LU Xiaoquan E-mail:liguodong@nanoctr.cn;luxq@nwnu.edu.cn
  • Supported by:
    This work was supported by the National Key Research and Development Program of China(Nos.2021YFA1500403 and 2021YFA1200302), the Strategic Priority Research Program of Chinese Academy of Sciences(No.XDB36000000), the National Natural Science Foundation of China(Nos.92056204, 21890381, 21721002, 22173024, 21722102 and 51672053), the Beijing Natural Science Foundation, China(No.2182087), and the Youth Innovation Promotion Association of CAS.

Abstract: Regulating Lewis acid sites with well-defined electronic state and steric environment is still challenging for achieving high catalytic efficiency. Here we show coordinating zirconium nodes in the typical metal-organic framework known as MOF-545 with the monocarboxylate modulators including trifluoroacetic acid(TFA) or benzoic acid(BA) over meso-tetra(4-carboxyphenyl)-porphine(H2TCPP), denoted as MOF-545-TFA or MOF-545-BA. Impressively, MOF-545-TFA shows the significantly enhanced performance for the catalytic ring-opening reaction of various epoxides with alcohols and good recyclability at 40 °C in respect with MOF-545-BA and ZrO2. This mainly originates from the stronger Lewis acidity and more active zirconium sites induced by the electron-withdrawing TFA, resulting in the increased ability for activation of epoxides. This modulation approach is promising for enlarging the toolbox to extend the MOFs-based Lewis acid catalysis.

Key words: Metal-organic framework, Active zirconium site, Trifluoroacetic acid, Epoxide ring-opening, Modulator effect