2025/05/21 by A. Marković, Tomaž Kotnik, Sebastijan Kovačič · 1 voice
Materials Science · #Conducting polymers and applications #Covalent Organic Framework Applications #Luminescence and Fluorescent Materials
paper · doi:10.1016/j.polymer.2025.128574
openalex publication_date 2025/05/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/13
In this work, we have developed an easy approach for vinylene-linked ion-in-conjugation porous polymer networks (IIC-PPN) using Knoevenagel polycondensation of predesigned zwitterionic N -(3-sulfopropyl)-2,6-(dimethyl)pyridinium salt and 1,3,5-triformylbenzene as monomers. The resulting IIC-PPNs exhibit a porous morphology with high specific surface areas up to 263 m 2 ·g -1 . Although the IIC-PPN network contains arylene-vinylene nodes that make it apolar, the incorporation of zwitterionic pyridinium building blocks enable a significant ionic dipole, which is reflected in the water uptake of 14.5 g·g -1 , which is higher than that of similar poly(arylene-cyano-vinylene)s with 7.0, 8.5 and 5.3 g·g -1 for PAV – CN, PAV – OMe, and PAV – CHO, respectively. The IIC-PPNs exhibit significant semiconducting properties with optical absorption band edges of 512 nm and an electrochemical band gap of 2.55 eV. The intriguing properties of IIC-PPN prompted us to use them as heterogeneous photocatalysts to photooxidize the endocrine disrupting compound bisphenol A (BPA) dissolved in water under visible light.