Chinese Journal of Catalysis ›› 2025, Vol. 69: 271-281.DOI: 10.1016/S1872-2067(24)60196-8

• Articles • Previous Articles     Next Articles

2D Phthalocyanine-based covalent organic frameworks for infrared light-mediated photocatalysis

Xiaoning Zhan, Yucheng Jin, Bin Han(), Ziwen Zhou, Baotong Chen, Xu Ding, Fushun Li, Zhiru Suo, Rong Jiang(), Dongdong Qi, Kang Wang, Jianzhuang Jiang()   

  1. Affiliation Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2024-10-09 Accepted:2024-11-07 Online:2025-02-18 Published:2025-02-10
  • Contact: E-mail: hanbin@ustb.edu.cn (B. Han), hazelj999@163.com (R. Jiang), jianzhuang@ustb.edu.cn (J. Jiang).
  • Supported by:
    Natural Science Foundation of China(22205015);Natural Science Foundation of China(22175020);Natural Science Foundation of China(22235001);National Postdoctoral Program for Innovative Talents(BX20220032);China Postdoctoral Science Foundation Funded Project(2022BG013);Fundamental Research Funds for the Central Universities(00007709);Fundamental Research Funds for the Central Universities(00007770);University of Science and Technology Beijing

Abstract:

Covalent organic frameworks (COFs) based photocatalysts utilizing infrared light remains unexplored due to the limitation of electronic absorption. Herein, two novel two-dimensional (2D) polyimide-linked phthalocyanine COFs, namely MPc-DPA-COFs (M = Zn/Cu), were prepared from the imidization reaction of metal tetraanhydrides of 2,3,9,10,16,17,23,24-octacarboxyphthalocyaninato (M(TAPc)) with 9,10-diphenyl anthracene (DPA). Both COFs possess highly crystalline eclipsed AA stacking structure with neighboring layer distance of 0.33 nm on the basis of powder X-ray diffraction analysis and high-resolution transmission electron microscopy. Effective π-π interaction between phthalocyanine chromophores in neighboring layers of 2D COFs leads to significant bathochromic-shift of narrow Q band from 697 nm for M(TAPc) to the infrared light absorption range of 760-1000 nm for MPc-DPA-COFs according to solid UV-vis diffuse reflectance spectra. This endows them in particular ZnPc-DPA-COF with excellent reactive oxygen species of O2 and 1O2 generation activity under infrared light radiation (λ > 760 nm) based on the electron spin resonance spectroscopy measurement, in turn resulting in the excellent photocatalytic capacity towards oxidation of sulfides under infrared light radiation. Corresponding quenching experiments reveal the contribution of both O2 and 1O2 to the oxidation of sulfides, but the former O2 species plays a leading role in this photocatalytic process. The present result not only provides a new efficient infrared light photocatalyst but also unveils the good potentials of phthalocyanine-based COFs in photocatalysis.

Key words: Covalent organic framework, Infrared light, Photocatalysis, Reactive oxygen species, Oxidation of sulfides