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Luminescence and Reversible Luminescence Thermochromism of Bulk and Microcrystals of Dibenzoylmethanatoboron Difluoride

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Essential differences in the luminescence properties of dibenzoylmethanatoboron difluoride (1) bulk and microcrystals were detected. Analysis of the spectral data showed that in every case the fluorescence spectrum of 1 consisted of three components: monomer fluorescence, excimer fluorescence, and fluorescence related with interdimer interaction. Evolution of luminescence spectra observed with decrease of the crystal size are bound with decrease of monomer fluorescence intensity and considerable growth of intensity of fluorescence related to interdimer interaction. The presence of reversible luminescence thermochromism was discovered for 1: lowering the temperature from 300 to 77 K resulted in essential hypsochromic shift of the luminescence band maximum (∼60 nm) connected with considerable decrease of the distances between the planes of the neighboring molecules (∼0.1 Å) that lead to the weakening of interdimer interaction and intensification of monomer luminescence.

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ACKNOWLEDGMENT

This work was carried out under support of the Russian Fund of Fundamental Researches (Project no. 04-03-33155).

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Authors and Affiliations

  1. Institute of Chemistry, Far-Eastern Branch of the Russian Academy of Sciences, 159 prosp. 100-letiya Vladivostoka, 690022, Vladivostok, Russian Federation

    A. G. Mirochnik, E. V. Fedorenko, V. G. Kuryavyi, B. V. Bukvetskii & V. E. Karasev

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  1. A. G. Mirochnik
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  2. E. V. Fedorenko
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  3. V. G. Kuryavyi
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  4. B. V. Bukvetskii
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  5. V. E. Karasev
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Correspondence to A. G. Mirochnik.

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Mirochnik, A.G., Fedorenko, E.V., Kuryavyi, V.G. et al. Luminescence and Reversible Luminescence Thermochromism of Bulk and Microcrystals of Dibenzoylmethanatoboron Difluoride. J Fluoresc 16, 279–286 (2006). https://doi.org/10.1007/s10895-005-0039-7

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  • DOI: https://doi.org/10.1007/s10895-005-0039-7

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