SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2025, Vol. 81 ›› Issue (5): 232-240.DOI: 10.1016/j.cjche.2025.02.004

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Configured droplet reactor by Pd/g-C3N4 for the Suzuki-Miyaura cross-coupling reaction under water condition

Lulu Xing1,2, Mingshuang Li1,2, Yuanyuan Shan1, Xingbao Wang2   

  1. 1. Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
    2. State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2024-09-20 Revised:2025-02-07 Accepted:2025-02-08 Online:2025-03-10 Published:2025-05-28
  • Contact: Yuanyuan Shan,E-mail:shanyuanyuan@tyut.edu.cn
  • Supported by:
    The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (22178243).

Configured droplet reactor by Pd/g-C3N4 for the Suzuki-Miyaura cross-coupling reaction under water condition

Lulu Xing1,2, Mingshuang Li1,2, Yuanyuan Shan1, Xingbao Wang2   

  1. 1. Institute of New Carbon Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
    2. State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China
  • 通讯作者: Yuanyuan Shan,E-mail:shanyuanyuan@tyut.edu.cn
  • 基金资助:
    The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (22178243).

Abstract: The Pd-catalyzed Suzuki-Miyaura coupling reaction is a crucial tool for constructing C-C bonds. Currently, the organic solvents employed during reaction may cause serious environmental problems. Moreover, the low solubility of inorganic bases in organic solvents leads to enormous mass transfer resistance. To address this issue, the Pickering droplets reactor stabilized by Pd/g-C3N4 at substrate-water two-phase interface is reported. Benefiting from the hydrophobic conjugated framework and hydrophilic terminal groups, Pd/g-C3N4 can configure stable Pickering emulsion without additional functionalization. The Pd loaded catalysts exhibits excellent performance (TOF = 21852 h-1) for the Suzuki-Miyaura coupling reaction, which is deriving from unique electronic structure of g-C3N4 and high interfacial area of emulsion. Moreover, there is no clear decrease in reactivity after six cycles (conversion >86%). In this study, the organic solvent was replaced by reaction substrate, and the high activity can be achieved for various halogenated aromatic hydrocarbons and their derivatives.

Key words: Pickering emulsion, G-C3N4, Suzuki-Miyaura cross-coupling, Pd nanoparticles, Droplet reactor

摘要: The Pd-catalyzed Suzuki-Miyaura coupling reaction is a crucial tool for constructing C-C bonds. Currently, the organic solvents employed during reaction may cause serious environmental problems. Moreover, the low solubility of inorganic bases in organic solvents leads to enormous mass transfer resistance. To address this issue, the Pickering droplets reactor stabilized by Pd/g-C3N4 at substrate-water two-phase interface is reported. Benefiting from the hydrophobic conjugated framework and hydrophilic terminal groups, Pd/g-C3N4 can configure stable Pickering emulsion without additional functionalization. The Pd loaded catalysts exhibits excellent performance (TOF = 21852 h-1) for the Suzuki-Miyaura coupling reaction, which is deriving from unique electronic structure of g-C3N4 and high interfacial area of emulsion. Moreover, there is no clear decrease in reactivity after six cycles (conversion >86%). In this study, the organic solvent was replaced by reaction substrate, and the high activity can be achieved for various halogenated aromatic hydrocarbons and their derivatives.

关键词: Pickering emulsion, G-C3N4, Suzuki-Miyaura cross-coupling, Pd nanoparticles, Droplet reactor