Platinum(ii) complex end functionalized star polymers have been synthesized by reacting K2PtCl4 with star ligands ended with 2,6-bis(benzimidazol-2′-yl)pyridine. They show luminescence enhancements and form unimolecular micelles in solvents of weakened quality.
The electrostatic self-assembly of cationic platinum(ii) complexes with negatively charged block copolymers in water leads to the formation of fiber-like micelles with a platinum(ii)-based ionic core surrounded by a poly(ethylene oxide) corona, which exhibit intense phosphorescent emissions and appreciable conductivity.
Planar-coil supramolecular block copolymers fabricated from a cationic platinum(II) complex with sulfonate terminated polystyrenes can self-assemble into vesicles, which show further spontaneous fusion, with an hour-scale fusion time, in chloroform-methanol (v/v ¼ 1) mixed solvents. The vesicle fusion intermediates, including docking vesicles, arrow-like protrusions, stalk-like intermediates, hemifusion diaphragms and fusion pores, are clearly imaged by transmission electron microscopy. It is proposed that such a fusion process is triggered by Pt/Pt and p-p stacking interactions between the platinum(II) complexes.
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