Constructing three kinds of porous organic polymers and functionalizing by deep eutectic solvents: the effect of three-dimensional structure and π electronic structure of monomers

Abstract

Three kinds of porous organic polymers (POPs) with different topological structures, named CMP, HsGY and PAF, were prepared by Sonogashira–Hagihara cross-coupling reaction with three different monomers. POPs were characterized by field emission scanning electron microscope (FE-SEM), fourier transform infrared spectroscopy (FTIR), nitrogen absorption–desorption isotherm, etc. The characterization results indicated that three-dimensional structure and π electronic structure of monomers had a significant impact on the morphology and properties of POPs, and deep eutectic solvents (DES) was a simple and effective functionalization strategy. POPs had absorption in both the UV and visible light ranges. Among them, PAF had the widest visible light absorption edge, with an absorption edge of 627 nm (Eg = 1.98 eV). The carboxylation of DES improved the specific adsorption of POPs on fluoroquinolones. The most significant increase in adsorption capacity of carboxylated HsGY was observed. Its adsorption capacity for norfloxacin was 29.0 mg g−1, for ofloxacin was 28.4 mg g−1, and for ciprofloxacin was 29.1 mg g−1. POPs had double layer capacitance characteristics, and different monomers had a significant impact on the specific capacitance of POPs. DES amination could improve the specific capacitance of POPs. This work had promoted the development of POPs and provided reference for their applications in the fields of adsorbents and supercapacitors. Graphical Abstract: (Figure presented.).