Synthesis of tetraphenylethylene-based fluorescent conjugated microporous polymers for fluorescent sensing and adsorbing iodine

Two tetraphenylethylene-based fluorescent conjugated microporous polymers were obtained by the polymerization of a CH3SO3H catalyzed Friedel−Crafts polymerization reaction. The resulting CMPs show high thermal stability with a decomposition temperature above 575 and 487 °C, and have the porosity with BET surface area of 564.8 and 44.1 m2 g−1, respectively. Due to the introduction of tetraphenylethylene units, the CMPs have excellent fluorescence sensing performance for I2 with high Ksv of 1.53 × 105 and 9.07 × 104 L mol−1. Taking advantage of such porosity, effective sorption sites, and charge-transfer interactions, which display excellent I2 adsorption capacity in vapor with the uptake of up to 3.41 and 2.91 g g−1.