Used in the synthesis of metal-organic frameworks (MOFs) due to its ability to act as a rigid, multifunctional linker. The alkyne group allows for further functionalization via click chemistry, enabling post-synthetic modification of porous materials. Commonly employed in the development of functional porous materials for gas storage, catalysis, and sensing applications. Its carboxylic acid groups coordinate well with metal ions, forming stable network structures. Also explored in covalent organic frameworks (COFs) where directional bonding is required for framework design.