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An azine-linked hexaphenylbenzene based covalent organic framework.

Sampath B Alahakoon1, Christina M Thompson1, Amy X Nguyen1

  • 1Department of Chemistry and Biochemistry, The University of Texas, Dallas, 800 W. Campbell Rd. Richardson, TX 75080, USA. Ronald.Smaldone@utdallas.edu.

Chemical Communications (Cambridge, England)
|January 19, 2016
PubMed
Summary

Researchers developed a new azine-linked covalent organic framework (COF) using a hexphenylbenzene monomer. This material exhibits high surface area and excellent carbon dioxide and methane sorption capabilities.

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Area of Science:

  • Materials Science
  • Chemistry
  • Nanotechnology

Background:

  • Covalent organic frameworks (COFs) are crystalline porous polymers with tunable structures.
  • Developing novel COFs with enhanced gas sorption properties is crucial for applications in gas storage and separation.

Purpose of the Study:

  • To synthesize and characterize a new azine-linked covalent organic framework (COF).
  • To evaluate the gas sorption capabilities of the synthesized COF for carbon dioxide and methane.

Main Methods:

  • Synthesis of HEX-COF 1 using a six-fold symmetric hexphenylbenzene (HEX) monomer functionalized with aldehyde groups.
  • Characterization of the COF's pore size and surface area.
  • Sorption experiments for carbon dioxide and methane at 273 K and 1 atm.

Main Results:

  • The synthesized material, HEX-COF 1, is an azine-linked COF with an average pore size of 1 nm.
  • HEX-COF 1 possesses a high surface area exceeding 1200 m(2) g(-1).
  • The COF demonstrated excellent sorption capabilities, capturing 20 wt% of carbon dioxide and 2.3 wt% of methane.

Conclusions:

  • Azine-linked COFs based on HEX monomers are promising materials for gas sorption applications.
  • The high surface area and pore structure of HEX-COF 1 contribute to its efficient gas uptake.
  • This work expands the library of COFs for potential use in carbon capture and gas storage technologies.