Spectral and luminescent properties of hydroxyazomethines of indoline spiropyrans |
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Authors: | I R Mardaleishvili L S Kol’tsova N L Zaichenko V G Sister A I Shienok P P Levin A S Tatikolov |
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Institution: | 1.Semenov Institute of Chemical Physics,Russian Academy of Sciences,Moscow,Russia;2.Moscow State University of Engineering Ecology,Moscow,Russia;3.Emanuel Institute of Biochemical Physics,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | Spectral and luminescent properties of novel bifunctional compounds 1–3 based on indole spiropyrans and hydroxyazomethines
have been studied in comparison with the properties of the model compounds 5’-substituted spiropyrans and azomethines in organic
solvents and PMMA films at 293 and 77 K. Luminescence of compounds 1–3 is due to the presence of the azomethine fragment conjugated
with the indoline ring of the spiropyran moiety and determining the long-wavelength absorption band of 1–3. Depending on the
solvent, temperature, and the substituent, various combinations of the structures of the chromophore fragments are observed
in 1–3: the imine or amine form of the azomethine fragment and the spirocyclic or merocyanine form of the spiropyran fragment. |
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