Used as a key building block in the synthesis of conjugated porous organic polymers and covalent organic frameworks (COFs) for applications in gas storage and separation, particularly effective in capturing carbon dioxide due to its rigid, planar structure and extended π-conjugation. Its aldehyde functional groups allow for Schiff base reactions, enabling the construction of nitrogen-containing frameworks with high surface area. Also employed in the development of fluorescent sensors and optoelectronic materials, where its pyrene core enhances photostability and charge transport properties. Commonly applied in research settings for designing organic semiconductors and photocatalysts in energy conversion systems.