Through the incorporation of triethylene glycol (TEG) units into platinum(II) bzimpy complexes and by various spectroscopic and microscopy studies, an unusual thermo-responsive behaviour, which is distinct from those of other ethylene glycol–pendant compounds, was observed. The unprecedented existence of the large hysteresis resulting from the supramolecular assembly of the platinum(II) metallo-amphiphile has enabled the memory capability of the system.