Abstract
The features of photoisomerization and photoorientation of azo dye brilliant yellow (BY) in the thin film state are studied. The trans-cis-isomerization of the dye molecules is established to proceed upon irradiation of the films based on BY with a full light of an ultra-high pressure lamp DRT-1000 (UV / VID light), this reaction is described by the first-order reaction equation. Under the action of linearly polarized blue light (λ = 457 nm), an optical anisotropy arises in films of BY. Optically anisotropic films of BY with a high dichroic ratio (>10) are shown to be formed using N-methylpyrrolidone and N, N-dimethylformamide as solvents and cellulose acetate as the polymer matrix.
Highlights
The features of photoisomerization and photoorientation of azo dye brilliant yellow (BY) in the thin film state are studied
Multi-layered anisotropic films based on the azo dye brilliant yellow and organic polymers / Zh
Summary
The features of photoisomerization and photoorientation of azo dye brilliant yellow (BY) in the thin film state are studied. Под действием линейно поляризованного света в пленках на основе БЖ возникает оптическая анизотропия. Однако согласно данным работ [4; 6] молекулы БЖ не изомеризуются при облучении как растворов, так и индивидуальных пленок красителя. По мнению авторов [7] изменения в спектрах поглощения пленок БЖ, экспонированных линейно поляризованным синим светом (λ = 447 нм, I = 25 мВт/см2), свидетельствуют о том, что молекулы БЖ
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