Used in organic synthesis as a key intermediate for developing fluorescent probes and bioimaging agents due to its strong electron-withdrawing properties and ability to form conjugated systems. Its selenium-containing heterocyclic structure enhances photostability and allows for tuning of optical properties, making it valuable in the design of sensors for biological molecules. Also employed in materials science for creating semiconducting polymers and optoelectronic devices, where the bromine handle enables cross-coupling reactions to build complex molecular architectures.