Chromatic reversibility of multilayered polydiacetylene cast film

The cast film of polydiacetylene and PVA on a glass surface was fabricated to demonstrate a very fast and reversible chromatic response with respect to change in temperature. The N-[2-(2-hydroxyethoxy)ethyl]pentacosa-10,12-diynamide was sonicated in PVA solution. This solution was dried at room temperature for 3 days and the cast film was formed as multilayered structure. The UV irradiation led to in situ polymerization. The layered structures were confirmed by XRD data. The regularly layered polymeric cast film showed a very fast and reversible transition from blue to red. These results would be attributed to the well-arranged multilayer structure and hydrogen bonding.

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