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Emissive Properties and Intramolecular Charge Transfer of Pyrazoloquinoline Derivatives

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Abstract

The fluorescence properties of several pyrazoloquinoline derivatives were performed by stationary as well as by time-resolved spectrosopy. Non-donor-substituted compounds show a high quantum yield; transition dipole moments of absorption and fluorescence as well as experimental and calculated lifetimes are in excellent agreement. The donor-substituted compound DMA-DPPQ exhibits a charge transfer fluorescence in polar solvents. Additionally, dual fluorescence appears in polar protic solvents. The nature of the charge transfer state is discussed with respect to the the TICT model.

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Authors and Affiliations

  1. Institut für Theoretische Chemie und Strahlenchemie, University of Vienna, Althanstrafβe 14, A-1090, Vienna, Austria

    Karl Rechthaler & Gottfried Köhler

  2. Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44, PL-01-224, Warsaw, Poland

    Krystyna Rotkiewicz

  3. H. Kołłataj Agricultural University, al.Mickiewicza 24/28, PL-30-059, Cracow, Poland

    Andrzej Danel, Piotr Tomasik & Karen Khatchatryan

Authors
  1. Karl Rechthaler
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  2. Krystyna Rotkiewicz
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  3. Andrzej Danel
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  4. Piotr Tomasik
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  5. Karen Khatchatryan
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  6. Gottfried Köhler
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Rechthaler, K., Rotkiewicz, K., Danel, A. et al. Emissive Properties and Intramolecular Charge Transfer of Pyrazoloquinoline Derivatives. Journal of Fluorescence 7, 301–309 (1997). https://doi.org/10.1023/A:1022582026875

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