Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 12, Pages 11706-11714Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b18502
Keywords
flexible alkyl amine; covalent organic frameworks; intramolecular hydrogen bonding; metal ions adsorption; high capacity; selectivity adsorption
Funding
- China State Key Basic Research Program Grant [2016YFA0501402]
- National Science Fund for Distinguished Young Scholars [21525524]
- National Natural Sciences Foundation of China [21575141]
- CAS-Weigao Research & Development Program [[2017]-009]
Ask authors/readers for more resources
There are several researches on the preparation and application of hydrazone-linked covalent organic frameworks (COFs), and all of them generally necessitate rigid aromatic amines. Herein, we report a strategy for design and synthesis of COF with flexible alkyl amine as a building block and intramolecular hydrogen bonding as a knot in the network. The proof-of-concept design was demonstrated by exploring 1,3,5-triformylphloroglucinol and oxalyldihydrazide (ODH) as precursors to synthesize a novel COF material (TpODH), in which different organic building units are combined through hydrazone bonds to form two-dimensional porous frameworks. It should be pointed that irreversible enol-to-keto tautomerism and intramolecular N-H center dot center dot center dot O=C hydrogen bonding of TpODH would enhance the crystallinity and chemical stability, leading to large specific surface area of 835 m(2) g(-1). However, another COF synthesized with 1,3,5-triformylbenzene and ODH exhibited less crystallinity and low special surface area (94 m(2) g(-1)). Representatively, the resulting TpODH afforded Cu(II) and Hg(II) capacities of 324 and 1692 mg g(-1), respectively, which exceeded that of most COFs previously reported. Moreover, the Fourier-transform infrared and X-ray photoelectron spectroscopy spectra analyses were taken to demonstrate the adsorption mechanism. These results suggested that the materials could be applied to the removal of metallic ions in the future.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available