Conclusions
When an indoline spiropyran (SPP) with electron-donor substituents in the chromene part of the molecule is introduced into a polymer matrix, in particular into copolymers of methyl methacrylate with oxyethyl methacrylate, there is a decrease in the rate of reaction of dark decolorization of the photoinduced form of the SPP, owing to interaction of the proton-donor units of the oxyethyl methacrylate and the oxygen of the chromene heterocycle of the photoinduced form of the SPP molecule, leading to the formation of an intermolecular hydrogen bond.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1277–1282, June, 1983.
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Semyakina, G.M., Samedova, T.G., Popova, N.I. et al. Regulation of photochromic properties of fast-relaxing spiropyrans in polymer films. Russ Chem Bull 32, 1153–1157 (1983). https://doi.org/10.1007/BF00953147
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DOI: https://doi.org/10.1007/BF00953147