Used as a functional linker in bioconjugation and surface modification due to its reactive N-hydroxysuccinimide (NHS)-like ester group. The perfluorophenyl ester readily reacts with primary amines on proteins, peptides, or amine-functionalized surfaces, forming stable amide bonds. Its extended oligoethylene glycol spacer provides flexibility, reduces steric hindrance, and enhances solubility in aqueous and organic media, making it ideal for immobilizing biomolecules on sensors, nanoparticles, or microarrays. Commonly applied in diagnostic assays, targeted drug delivery systems, and development of biosensors where controlled orientation and efficient coupling of biomolecules are required.