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Indexed by:期刊论文

Date of Publication:2014-06-07

Journal:JOURNAL OF MATERIALS CHEMISTRY A

Included Journals:EI、SCIE、Scopus

Volume:2

Issue:21

Page Number:7795-7801

ISSN No.:2050-7488

Abstract:Engineering porosity and surface functionalization in nanoporous organic polymers remain challenging. Here, we achieve control over the porosity as well as the pre-functionalization of pore walls of a carbazole-modified polytriazine framework by the introduction of three different appended functional groups (methyl, ethyl acetate and phenyl). All the synthesized nanoporous organic polytriazines (NOPs) display good thermal stability and high BET surface areas. The phenyl-anchored framework (NOP-21) exhibits the highest CO2 capacity (12.3 wt% at 273 K and 1 bar) and isoteric heat values (Q(st), 37 kJ mol(-1)). Besides, the highest selectivity based on the ideal adsorbed solution theory (IAST) model at 273 K was amazingly observed for the ethyl acetate-appended framework (NOP-20): CO2-N-2 81 (273 K, 1.0 bar), because of uniform ultramicropores through pore engineering. These results suggest a good feasibility for constructing high-performance organic porous CO2 sorbents by controlling porosity.