Thin films and multilayer thin-fi lm coatings based on the new dichroic azo dye disodium bis[(4-hydroxy-3-carboxylate-6-methyl)phenylazo]-5,5′-dioxobenzothiophene (FtF-1) were produced by the spin-coating method. The optical properties and morphology of the FtF-1 films depended on the formation conditions and used solvents. Reversible photo-induced dichroism was observed in films obtained by spin-coating of FtF-1 solutions in DMF and aqueous polyvinylpyrrolidone on quartz substrates upon irradiation with plane-polarized light (λ = 450 nm, I = 15 mW/cm2). The anisotropic properties of the FtF-1 films were caused by trans-cis-isomerization of the irradiated dye molecules.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 82, No. 2, pp. 169–174, March–April, 2015.
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Chaplanova, J.D., Muravskii, A.A., Agabekov, V.E. et al. Features of the Photoalignment of Disodium Bis-[(4-Hydroxy-3-Carboxylate-6-Methyl)Phenylazo]-5,5′-Dioxobenzothiophene in Thin Films. J Appl Spectrosc 82, 169–174 (2015). https://doi.org/10.1007/s10812-015-0082-3
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DOI: https://doi.org/10.1007/s10812-015-0082-3