Photopolymerization of the Langmuir‒Schaefer Films of Symmetrical Diynylic N-Arylcarbamate Molecules with Different Numbers of СН2 Groups in Spacers

Abstract

The photopolymerization of Langmuir–Schaefer films of symmetrical diacetylene N-arylcarbamate molecules containing different numbers of methylene groups has been studied. UV irradiation of the diyne films led to their effective transition to the stable state of blue phase polydiacetylene. The number of CH₂ groups in the molecules affected the efficiency of the transition of the monomer film to the polymer and the polymer chain conjugation length. The scanning electron microscopy of the film morphology revealed a horizontal arrangement of the diyne molecules on substrates in the state of domains, the sizes of which depend on the number of CH₂ groups in the molecules.