Synthesis and Characterization of [1]Benzothieno[3,2-b]benzothiophene-based Porous Organic Polymers for Photocatalysis

During the internship at IMDEA Energía, intensive experimental work was carried out focusing on the synthesis, purification, and characterization of COFs (Covalent Organic Frameworks) and CPPs (Conjugated Porous Polymers). Reaction conditions, solubilization, and purification methods (TLC, chromatography column, dialysis) were optimized to obtain materials with high purity and yield. The samples were characterized by XRD, IR-ATR, BET, FESEM, TGA, CV, and reflectance spectroscopy to investigate their structure, porosity, thermal stability, and optoelectronic properties. Part of the activity was dedicated to evaluating the photocatalytic hydrogen production in the presence of TiO₂ and Pt. The results showed that the properties of the materials can be tuned through synthetic conditions and post-treatment processes, directly affecting their photocatalytic performance.