dinuclear alkynylplatinum(II) bzimpy (bzimpy = 2,6-bis( N-alkylbenzimidazol-2'-yl)pyridine) complexes containing the shape-persistent oligo( p-phenyleneethynylene)s. Multistage morphological transformations from plates to fibers and to spherical nanostructures under different solvent compositions have been demonstrated. The subtle balances between multiple noncovalent interactions including Pt···Pt, hydrophobic