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Inclusion complexes naphthalene-γ-cyclodextrin-adamantane and naphthalene-γ-cyclodextrin-o-carborane: the structure and luminescence properties

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Abstract

The luminescence properties of inclusion complexes of naphthalene-d8 with γ-cyclodextrin (γ-CD) in the presence of adamantane or o-carborane added as third parties were studied in aqueous solutions. It was found that the structure of the cage compound added to the aqueous solution of the naphthalene-d8@γ-CD complex completely determines the luminescence type of the ternary complex. For instance, the intensity of excimer fluorescence (EF) band increases considerably at the expense of reduction of the intensity of monomer fluorescence (MF) band on adding adamantane. On the contrary, adding o-carborane causes a decrease in the intensity of the EF band of naphthalene-d8 and simultaneous appearance of MF in addition to long-lived room-temperature phosphorescence (RTP) whose lifetime increases from 1.5 s to 9.1 s after deoxygenation of the solution. Structural differences between the complexes affecting their behavior under the action of the third parties were explained using the results of semiempirical quantum chemical calculations.

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 prosp. Akad. Semenova, 142432, Chernogolovka, Moscow Region, Russian Federation

    V. B. Nazarov & T. G. Vershinnikova

  2. Photochemistry Center, Russian Academy of Sciences, 7a ul. Novatorov, 119421, Moscow, Russian Federation

    V. G. Avakyan, M. V. Alfimov & V. Yu. Rudyak

Authors
  1. V. B. Nazarov
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  2. V. G. Avakyan
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  3. T. G. Vershinnikova
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  4. M. V. Alfimov
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  5. V. Yu. Rudyak
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Corresponding authors

Correspondence to V. B. Nazarov or V. G. Avakyan.

Additional information

Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 662–664, March, 2012.

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Nazarov, V.B., Avakyan, V.G., Vershinnikova, T.G. et al. Inclusion complexes naphthalene-γ-cyclodextrin-adamantane and naphthalene-γ-cyclodextrin-o-carborane: the structure and luminescence properties. Russ Chem Bull 61, 665–667 (2012). https://doi.org/10.1007/s11172-012-0098-2

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  • DOI: https://doi.org/10.1007/s11172-012-0098-2

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