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Hydrogen atom transfer and triplet exciplexes in photochemical reactions of acridine and 9-chloroacridine with aromatic amines

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

Conclusions

  1. 1.

    Molecules of acridine and chloroacridine in the triplet state form triplet exciplexes of the radical ion pair type with tertiary aromatic amines. Proton transfer from the radical cation to the radical anion with formation of neutral radicals is the basic pathway of quenching of these exciplexes in a nonsolvating medium. In the presence of an alcohol, the triplet exciplexes disappear due to protonation of the radical anion in the exciplex.

  2. 2.

    Quenching of triplet states of acridine and chloroacridine by secondary aromatic amines take place by transfer of an H atom from the amine regardless of the nature of the solvent.

  3. 3.

    The singlet excited state is the most probable reactive state of 9-chloroacridine in photoreduction and photosubstitution reactions with aromatic amines.

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Authors and Affiliations

  1. Institute of Chemical Physics, Academy of Sciences of the USSR, Moscow

    P. P. Levin, V. A. Kuz'min, R. M. Fatkulbayanov, M. F. Budyka & M. V. Alfimov

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

    P. P. Levin, V. A. Kuz'min, R. M. Fatkulbayanov, M. F. Budyka & M. V. Alfimov

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  1. P. P. Levin
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  2. V. A. Kuz'min
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  3. R. M. Fatkulbayanov
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  4. M. F. Budyka
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  5. M. V. Alfimov
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 269–275, February, 1989.

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Levin, P.P., Kuz'min, V.A., Fatkulbayanov, R.M. et al. Hydrogen atom transfer and triplet exciplexes in photochemical reactions of acridine and 9-chloroacridine with aromatic amines. Russ Chem Bull 38, 225–231 (1989). https://doi.org/10.1007/BF00953601

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  • DOI: https://doi.org/10.1007/BF00953601

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