Used as a key intermediate in the synthesis of advanced ligands for coordination chemistry, particularly in the development of ruthenium-based dyes for dye-sensitized solar cells (DSSCs). Its aldehyde functional groups allow for easy modification and extension of the π-conjugated system, enhancing light absorption and electron injection efficiency. Also employed in the preparation of metallo-supramolecular polymers and sensors due to its ability to chelate transition metals and form stable complexes with photophysical properties useful in optoelectronic devices and catalysis.