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Exo-5-norbornenecarboxylic acid is a bicyclic compound that has potential applications in the field of material science due to its unique chemical properties. It is a versatile building block for the synthesis of various functional materials, including polymers, dendrimers, and self-assembled monolayers. It can be used to modify surfaces or to functionalize nanoparticles, influencing their optical, magnetic, or electronic properties. It is also often used in ring-opening metathesis polymerization reactions to form polymers with controlled molecular weight and structure. Additionally, exo-5-norbornenecarboxylic acid can function as a ligand for coordination chemistry and catalysis.

Exo-5-norbornenecarboxylic acid can be used as:

• A starting material in the synthesis of the metathesis polymer via a ring-opening metathesis polymerization (ROMP) reaction of the ester of exo-5-norbornenecarboxylic acid and 1,1μ-bi-2-naphthol.
• A monomer in the preparation of thin films via surface-initiated polymerization process. The resulting thin film serves as a template for selective deposition and etching of metal oxides, which is of significant importance in the microelectronic industry.

exo-5-Norbornenecarboxylic acid can be used as a precursor in the synthesis of:

• Different crosslinkers for ring-opening metathesis polymerization.
• Norbornene-functionalized monomers, which are used to make poly(norbornene)s via ring-opening metathesis polymerization (ROMP).
• Hydrolytically cleavable and hydrolytically stable functionalized macromonomers for hydrogel preparation.

[1] IVAN V NAZAROV. Gas-Transport and the Dielectric Properties of Metathesis Polymer from the Ester of exo-5-Norbornenecarboxylic Acid and 1,1’-Bi-2-naphthol.[J]. ACS Applied Energy Materials, 2022. DOI:10.3390/polym14132697.
[2] CHRISTOPHER L. MCGANN. Thiol-ene Photocrosslinking of Cytocompatible Resilin-Like Polypeptide-PEG Hydrogels[J]. Macromolecular bioscience, 2015, 16 1: 129-138. DOI:10.1002/mabi.201500305.