Pyrene‐cored covalent organic polymers by thiophene‐based isomers, their gas adsorption, and photophysical properties. Issue 14 (7th May 2017) - Li, Changfeng
ABSTRACT: Two new pyrene‐cored covalent organic polymers (COPs), CK‐COP‐1 andCK‐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 m 2 g −1 and 615 m 2 g −1 forCK‐COP‐1 andCK‐COP‐2, respectively. The CO2 uptake capacities ofCK‐COP‐1 andCK‐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 273 K compared withCK‐COP‐1 .CK‐COP‐1 andCK‐COP‐2 also exhibit considerable differences in their photophysical property. The different structure and properties ofCK‐COPs could be attributed to the isomer effect of their corresponding thiophene‐based monomers. © 2017 Authors. Journal of Polymer Science Part A: Polymer Chemistry Published by Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem.2017, 55, 2383–2389 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. Their isomer effect can lead to the different structure and properties of the corresponding polymers. The resulting pyrene‐cored COPs exhibit rather different surface areas and CO2 uptake capacities at 273 K, respectively. Furthermore, CK‐COP‐2 offers a better CO2/CH4 selectivity compared with CK‐COP‐1. Additionally, they also exhibit considerable difference in their photophysical property.