Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (10): 20220210.doi: 10.7503/cjcu20220210

• Organic Chemistry • Previous Articles     Next Articles

Synthesis, Structure and Characterization of a Dihydrophenazine Based 3D Covalent Organic Framework

WANG Kaixuan, LI Ziping, CHEN Xianyang, CUI Yong()   

  1. School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China
  • Received:2022-04-04 Online:2022-10-10 Published:2022-04-28
  • Contact: CUI Yong E-mail:yongcui@sjtu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(91851204);the National Key Research and Development Program of China(2021YFA1200302)

Abstract:

Dihydrophenazine derivatives have received considerable attention due to their unique redox activity. In this paper, a dihydrophenazine based monomer 5,10-di(4-formylphenyl)-5,10-dihydrophenazine(M1) was designed and synthesized, and 3D-PN-2 was then prepared with a Schiff-base reaction by the combination of M1 and tetrakis(4-aminophenyl)methane(TAM). 3D-PN-2 was characterized by powder X-ray diffraction(PXRD), nitrogen adsorption-desorption experiment, FTIR, 13C CP/MAS NMR, SEM and TEM. After combined with theoretical simulation, 3D-PN-2 was identified as a three-dimensional covalent organic framework(3D COF) with an 11-fold interpenetrated dia topology. Subsequent studies showed that 3D-PN-2 had good thermal and chemical stability. The optical absorption property of 3D-PN-2 was studied by UV-Vis diffuse reflectance spectrum. 3D-PN-2 exhibits broad absorption in the region from UV to visible light(absorption edge: 630 nm), and the band gap of 3D-PN-2 is 2.11 eV. The redox property was studied by cyclic voltammetry, and the highest occupied molecular orbital(EHOMO) and lowest unoccupied molecular orbital(ELUMO) were calculated to be -4.50 and -2.39 eV, respectively. These results suggest that 3D-PN-2 will be a promising COF candidate for photocatalysis applications.

Key words: Covalent organic framework(COF), Dihydrophenazine, Porous material

CLC Number: 

TrendMD: