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Luminescence-spectral characteristics and structure of 1-hydroxyphenyl-substituted 2,4,6-triphenylpyridinium perchlorates

  • Physical Chemistry
  • Published:
Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Conclusions

  1. 1.

    A significant difference was found in the luminescence characteristics of 1-(2-hydroxyphenyl)- and 1-(4-hydroxyphenyl)-2,4,6-triphenylpyridinium perchlorates at various temperatures. At 293°K the luminescence of both compounds in the crystalline state and in solutions is fluorescence with an anomalously large Stokes shift; at 77°K it is fluorescence for the second compound and long-lived phosphorescence for the first.

  2. 2.

    Comparison of the luminescence-spectral characteristics of these compounds with their structure and with the luminescence characteristics of model compounds made it possible to attribute the appearance of the anomalously large Stokes shift of the fluorescence to changes in the molecular structure in the excited state, due to flattening of the molecule as a result of rotation of the N-aryl fragment about the N-C bond.

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Authors and Affiliations

  1. Branch of the Institute of Chemical Physics, Academy of Sciences of the USSR, Chernogolovka

    S. M. Aldoshin, Ya. R. Tymyanskii, O. A. D'yachenko, L. O. Atovmyan, M. I. Knyazhanskii & G. N. Dorofeenko

  2. Scientific-Research Institute of Physical and Organic Chemistry, Rostov-on-Don

    S. M. Aldoshin, Ya. R. Tymyanskii, O. A. D'yachenko, L. O. Atovmyan, M. I. Knyazhanskii & G. N. Dorofeenko

Authors
  1. S. M. Aldoshin
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  2. Ya. R. Tymyanskii
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  3. O. A. D'yachenko
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  4. L. O. Atovmyan
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  5. M. I. Knyazhanskii
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  6. G. N. Dorofeenko
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Additional information

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2270–2279, October, 1981.

We express our gratitude to Yu. N. Andreichikov for providing the crystals for the investigation.

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Aldoshin, S.M., Tymyanskii, Y.R., D'yachenko, O.A. et al. Luminescence-spectral characteristics and structure of 1-hydroxyphenyl-substituted 2,4,6-triphenylpyridinium perchlorates. Russ Chem Bull 30, 1864–1872 (1981). https://doi.org/10.1007/BF00963410

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  • DOI: https://doi.org/10.1007/BF00963410

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