A series of ligands has been constructed from a central bis-pyrazolyl–pyridine core and various deprotonable chelating pockets based on mixed carboxylate/phosphate or phosphate anionic functions and a central flexible pendent arm for subsequent grafting to biomaterials. For some of these ligands, the sequence of reactions incorporates an additional step introducing a substituted diethynylphenyl residue to increase significantly ...
