Fig. 1From: Thermochromic phantoms and paint to characterize and model image-guided thermal ablation and ablation devices: a reviewAmphiphilic Bis-bipyridinium π-Acceptor (blue) interacts with π-Donors (red) and water molecules to assume thermochromic property with temperature changes. Thermochromism and thermochromic transition temperature for each complex shown at the bottomBack to article page