Structure–Activity Relationship and Stimuli-Responsiveness Behavior of Metallosupramolecular Polymers

Figure 20

(Top) Cross-linked film image 2b. Eu(NTf₂)₃ in its permanent shape (a) under low-intensity (70 mW/cm²) UV light and (b) under high-intensity (1,000 mW/cm²) UV light selectively irradiated the left side of the film. (Middle) DMTA of unrelated films 1. Eu(NTf₂)₃ with cross-linking 2a–c. Eu(NTf₂)₃. Enhancement of the mechanical properties beyond 40°C, at which time the uncrosslinked film flows. Increasing cross-linking suppresses T_g. (Below) Photo depicted the chemo-responsive shape-memory behavior of 2b. Eu(NTf₂)₃ films prepared in methanol. Reprinted with permission from ref. [114].