D-A type covalent organic framework nanorods for visible light catalyzed benzylamine coupling reaction

doi:10.7503/cjcu20250020

Chem. J. Chinese Universities

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D-A type covalent organic framework nanorods for visible light catalyzed benzylamine coupling reaction

ZHANG xiaohui,ZHAO Dongdong, ZHANG Junjie, ZHUANG Jinliang

School of Chemistry and Materials Science, Guizhou Normal University, Key Laboratory of Functional Materials Chemistry of Guizhou Province

Received:2025-01-20 Revised:2025-03-11 Online:2025-03-26 Published:2025-03-26
Contact: Jin-Liang ZHUANG E-mail:jizhuang@xmu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China (No. 22372045), the Science and Technology Foundation of Guizhou Province, China (No.ZK[2022]corefund034, KXJZ[2024]029), Guizhou Science and Technology Innovation Leading Talent Workstation of New Energy Materials and Green Catalysis(No. KXJZ[2024]029), and the Youth Scientific Research Project of Guzhou Provincial Education Department, China (Qian Jiao Ji [2022] No.141)

Abstract

Abstract: Covalent Organic Frameworks (COFs) are a new type of covalently bonded crystalline materials with predictable structures and permanent porosity. COFs have found extensive applications in heterogeneous catalysts. In this study, organic monomers containing photoactive pyrene groups (TFPPy) and benzothiadiazole (BTz) were used as building units for the construction of COFs. The D-A type (donor-acceptor) TFPPy-BTz-COF nanorods photocatalysts were successfully synthesized via a solvent-thermal method. The morphology, structure, and composition of TFPPy-BTz-COF were characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), Fourier-transform infrared spectroscopy (FT-IR), and N2 adsorption-desorption measurements. The as-synthesized TFPPy-BTz-COF nanorods exhibited a rod-like morphology with high degree of crystallinity, a specific surface area (BET) of 118.86 m2/g, and a band gap (Eg) of 2.22 eV. Benefiting from their efficient photogenerated photo-electron pair ability, the TFPPy-BTz-COF nanorods enable the coupling reaction of various amines with high efficiency and selectivity under conditions of room temperature, oxygen atmosphere, and visible light irradiation. Electron paramagnetic resonance spectroscopy (EPR) and active species trapping experiments suggested that the singlet oxygen (1O2) and superoxide radical (O2??) are key intermediates, and a catalytic mechanism for the visible light mediated photocatalytic oxidation coupling of benzylamines catalyzed by TFPPy-BTz-COF was proposed.

Key words: D-A covalent organic frameworks, visible light mediated photocatalysis, nanorods, benzylamine coupling

CLC Number:

O643

TrendMD:

ZHANG xiaohui, ZHAO Dongdong, ZHANG Junjie, ZHUANG Jinliang. D-A type covalent organic framework nanorods for visible light catalyzed benzylamine coupling reaction[J]. Chem. J. Chinese Universities, doi: 10.7503/cjcu20250020.

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D-A type covalent organic framework nanorods for visible light catalyzed benzylamine coupling reaction

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