摘要
Despite the great success in the synthesis of binary covalent organic frameworks(COFs)in the past decade,the fabrication of structurally ordered ternary COFs remains a big challenge,due to the inevitable competition and exchange of monomers.Herein,two ternary ordered COFs(2Me-OMe-COF and Me-2OMe-COF)are successfully synthesized by two-step polymerization based on irreversible covalent bonds.In contrast to the ternary random COFs synthesized by one-pot method,ternary ordered COFs possess definite structures at the molecular level.Accordingly,we systematically compare the performance of the two ternary ordered COFs in photocatalytic H_(2)production with two corresponding binary COFs as controlled comparison.Significantly,they exhibit very different photocatalytic performance,highlighting the importance of component and structural order for their properties.This work provides a unique strategy to the targeted polymerization and synthesis of ternary ordered,or even multivariate ordered COFs.
基金
supported by the National Key Research and Development Program of China(2021YFA1500400)
the National Natural Science Foundation of China(21725101,22205224,22205225,22161142001)
China Postdoctoral Science Foundation(BX2021281,2021M703064)
the Fundamental Research Funds for the Central Universities(WK3450000007,WK2060000038,WK2060000041,WK2060000045)。
