Used as a ligand in coordination chemistry, particularly in the formation of metal complexes for catalytic applications. Its phosphonate group allows for anchoring to metal oxide surfaces, making it useful in dye-sensitized solar cells and surface-modified electrodes. Employed in the development of luminescent sensors due to its ability to form stable complexes with transition metals and lanthanides. Also investigated in supramolecular chemistry for constructing functional metallo-organic architectures with potential applications in molecular electronics and photochemical devices.