Pyrene-cored covalent organic polymers by thiophene-based isomers, their gas adsorption, and photophysical properties.

ABSTRACT: Two new pyrene-cored covalent organic polymers (COPs), CK-COP-1 and CK-COP-2, were synthesized via the one-step polymerization of two thiophene-based isomers, 1,3,6,8-tetra(thiophene-2-yl) pyrene (L₁ ) and 1,3,6,8-tetra(thiophene-3-yl) pyrene (L₂ ). The resulting pyrene-cored COPs exhibit rather different surface areas of 54 m² g^-1 and 615 m²g^-1 for CK-COP-1 and CK-COP-2, respectively. The CO₂ uptake capacities of CK-COP-1 and CK-COP-2 also show different values of 2.85 and 9.73 wt % at 273 K, respectively. Furthermore, CK-COP-2 offers not only a larger CO₂ adsorption capacity but also a better CO₂/CH₄ selectivity at 27

SUBMITTER: Li C 

PROVIDER: S-EPMC5518284 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature