Triptycene-9,10-dicarboxaldehyde is widely used in the field of supramolecular chemistry due to its unique three-dimensional structure, which makes it an excellent building block for constructing complex molecular architectures. Its rigid, paddle-shaped geometry allows for the creation of host-guest systems, where it can act as a host molecule to encapsulate smaller guest molecules, facilitating studies in molecular recognition and sensing.

In materials science, it is employed in the development of advanced polymers and porous materials, such as metal-organic frameworks (MOFs) and covalent organic frameworks (COFs), where its aldehyde groups provide reactive sites for further functionalization. This enhances the material's properties, such as selectivity in gas adsorption or separation processes.

Additionally, its application extends to organic electronics, where it is used to synthesize conjugated molecules with potential use in organic light-emitting diodes (OLEDs) or photovoltaic devices, owing to its ability to improve charge transport and stability. Its versatility also makes it a valuable component in the design of fluorescent probes and sensors for detecting specific analytes in environmental or biological systems.