Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (2): 20220535.doi: 10.7503/cjcu20220535

• Physical Chemistry • Previous Articles     Next Articles

Preparation and Application of a Novel Porphyrin-based Porous Organic Polymer COP-180 Supported Palladium Catalyst

HE Jianyun1,2, JIANG Yunbo1,2(), ZHANG Aimin1,2(), TANG Zhenyan1,2, LI Hongpeng1,2   

  1. 1.Kunming Precious Materials & Technology Co. ,Ltd. ,Kunming 650106,China
    2.State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Kunming Institute of Precious Metals,Kunming 650106,China
  • Online:2023-02-10 Published:2023-02-11
  • Contact: JIANG Yunbo, ZHANG Aimin E-mail:jyb@ipm.com.cn;aimin.zhang@ipm.com.cn
  • Supported by:
    the National Key Research and Development Program of China(2022YFE0105100);the National Natural Science Foundation of China(51864022);the Recruitment of Oversea Talents of Kunming City, China(13020163);the R&D Application Research Project of Sino-Precious Metal Holding Co., Ltd., China(2020040603);the State Key Laboratory Program for Advanced Technologies for Comprehensive Utilization of Platinum Metals, China(SKLSPM-202008)

Abstract:

5,10,15,20-Tetra(4-nitrophenyl)-21H,23H porphyrin(TNPPH2) was synthesized by condensation reaction with p-nitrobenzaldehyde, acetic anhydride and pyrrole as raw materials and propionic acid as solvent. The porphyrin-based porous organic polymer COP-180 was synthesized with TNPPH2 and p-phenylenediamine as raw materials and anhydrous NN'-dimethylformamide(DMF) as solvent. Then the catalyst Pd@COP-180 was prepared by impregnation method without reducing agent with COP-180 as carrier and chloroparadic acid as precursor. The structures of the support and catalyst were characterized by Fourier transform infrared spectroscopy(FTIR), differential scanning calorimetry-thermogravimetric analysis(DSC-TG), transmission electron microscopy(TEM), X-ray photoelectron spectroscopy(XPS) and N2 adsorption desorption. Finally, the Suzuki-Miyaura cross-coupling reaction and 4-nitrophenol(4-NP) hydrogenation reduction reaction were used as model reactions to test the catalytic performance of catalyst; 0.5%(molar fraction) catalyst shows high efficiency in Suzuki coupling reaction of iodobenzene and phenylboric acid as substrate, and it has been used 10 times, there is still a high yield. When the amount of catalyst was 0.01%(molar fraction), the turn over frequency(TOF) was up to nearly 10000 h‒1. At room temperature, 20.46 μg 4-NP can be completely reduced by 8.00 μg catalyst in 10 minutes, and the standardized activity parameter kn was 894.60 s‒1·g‒1Pd.

Key words: Porphyrin-based porous organic polymer, Palladium-based catalyst, Suzuki-Miyaura coupling, 4-Nitrophenol reduction

CLC Number: 

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