Facile fabrication of hollow tubular covalent organic frameworks using decomposable monomer as building block.

ABSTRACT: In this study, a commercial and low-toxicity hydrazide-containing building block has been used to construct azine-linked covalent organic frameworks (COFs). New style COFs were constructed between flexible formic hydrazide (FH) and 1,3,5-triformylphloroglucinal (Tp) or 1,3,5-triformylbenzene (TFB). The two resulting COFs (TpFH and TFBFH) exhibited uniform hollow tubular morphology (20-50 nm for TpFH, 50-100 nm for TFBFH). Compared to hydrazine, FH has low-toxicity and is a flexible monomer, consisting of amine and aldehyde groups. The decomposition of FH slows down the reaction rate and the as-synthesized FH-series COFs (708 m² g^-1 for TpFH and 888 m² g^-1 for TFBFH) had higher specific surface area than hydrazine-series COFs (617 m² g<

SUBMITTER: Li Y 

PROVIDER: S-EPMC9034008 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature