Used primarily in research and development of organic electronic materials, 9-vinylphenanthrene serves as a building block for conjugated polymers and luminescent compounds. Its vinyl group enables polymerization, allowing integration into polymer chains that exhibit semiconducting properties. It is employed in the synthesis of specialty resins and fluorescent sensors due to the phenanthrene core’s strong light-emitting characteristics. Additionally, it finds use in photo-crosslinking systems where its reactive vinyl functionality facilitates network formation under UV exposure. Its rigid aromatic structure also makes it suitable for studying molecular interactions in supramolecular chemistry.