Incorporation of flexible pyridine-functionalized ligands into discrete supramolecules via coordination-driven self-assembly

Flexible, pyridine-functionalized ligands were self-assembled into discrete supramolecules of differing stoichiometries upon combination with various organoplatinum molecules. They are characterized by electrospray ionization mass spectrometry, P-31{H-1} and H-1 NMR. Despite its inherent flexibility, 3-substituted pyridines 1 and di-pyridyl substituted 18-membered diaza-crown ligand 8 prefer to self-assemble into closed systems when reacted with platinum-containing acceptors.