Used as a multifunctional building block in organic synthesis, particularly in the preparation of porous organic frameworks and covalent organic frameworks (COFs). Its four aldehyde groups enable cross-linking reactions, making it valuable in the design of conjugated polymers and network solids for applications in gas storage, catalysis, and optoelectronic materials. Commonly employed in Schiff base reactions to form imine-linked frameworks with tunable porosity and stability. Also explored in sensor development due to its extended π-conjugation and ability to coordinate with metal ions or form charge-transfer complexes.