Used in organic synthesis as a building block for conjugated materials, particularly in the preparation of functional polymers and metal-organic frameworks. Its ethynyl group enables click chemistry reactions, such as copper-catalyzed azide-alkyne cycloaddition (CuAAC), allowing efficient coupling with azide-containing compounds. This makes it valuable in bioconjugation, pharmaceutical research, and materials science for creating molecular architectures with tailored electronic properties. Also employed in the development of sensors and luminescent compounds due to its ability to coordinate with metal ions and participate in extended π-systems.