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

Two new pyrene-cored covalent organic polymers (COPs), and , were synthesized via the one-step polymerization of two thiophene-based isomers, 1,3,6,8-tetra(thiophene-2-yl) pyrene ( ) and 1,3,6,8-tetra(thiophene-3-yl) pyrene ( ). The resulting pyrene-cored COPs exhibit rather different surface areas of 54 m g and 615 mg for and , respectively. The CO uptake capacities of and also show different values of 2.