Copper(I)-catalyzed synthesis of nanoporous azo-linked polymers: Impact of textural properties on gas storage and selective carbon dioxide capture

Pezhman Arab, Mohammad Gulam Rabbani, Ali Kemal Sekizkardes, Timur Islamoǧlu, Hani M. El-Kaderi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

214 Scopus citations

Abstract

A new facile method for synthesis of porous azo-linked polymers (ALPs) is reported. The synthesis of ALPs was accomplished by homocoupling of aniline-like building units in the presence of copper(I) bromide and pyridine. The resulting ALPs exhibit high surface areas (SABET = 862-1235 m2 g-1), high physiochemical stability, and considerable gas storage capacity especially at high-pressure settings. Under low pressure conditions, ALPs have remarkable CO2 uptake (up to 5.37 mmol g-1 at 273 K and 1 bar), as well as moderate CO2/N2 (29-43) and CO2/CH4 (6-8) selectivity. Low pressure gas uptake experiments were used to calculate the binding affinities of small gas molecules and revealed that ALPs have high heats of adsorption for hydrogen (7.5-8 kJ mol-1), methane (18-21 kJ mol-1), and carbon dioxide (28-30 kJ mol-1). Under high pressure conditions, the best performing polymer, ALP-1, stores significant amounts of H2 (24 g L -1, 77 K/70 bar), CH4 (67 g L-1, 298 K/70 bar), and CO2 (304 g L-1, 298 K/40 bar).

Original languageEnglish (US)
Pages (from-to)1385-1392
Number of pages8
JournalChemistry of Materials
Volume26
Issue number3
DOIs
StatePublished - Feb 11 2014
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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