A one-pot synthetic strategy via tandem Suzuki–Heck reactions for the construction of luminescent microporous organic polymers

Abstract

A series of luminescent microporous organic polymers (LMOPs) have been synthesized by a new synthetic methodology through the palladium catalyzed tandem Suzuki–Heck C–C coupling reactions of several aromatic halides with potassium vinyltrifluoroborate. These polymers are porous with the BET surface areas from 318 to 693 cm² g⁻¹. The formation of conjugated polymers with the incorporation of vinyl groups leads to the fluorescent properties, and the luminescence of LMOPs could be adjusted from blue to green by selecting the aromatic halides and alternating the ratio of monomers. The fluorescence quenching behaviors of these LMOPs by nitroaromatic analytes in ethanol are investigated. It is found that the fluorescence of the polymers can be effectively quenched by picric acid (PA).