Abstract
It is shown that bis-quaternary salts of 4,4′-dipyridyl (viologens) stimulate the J-aggregation of anionic cyanine dyes in an aqueous solution. It is concluded that the behavior of multiply charged inorganic and organic cations is similar: both types of polycations result in the self-assembly of ordered J-aggregate structures from dimers. It is found that multichromic J-aggregates with the participation of cationic cyanine dyes are formed on the “platform” of J-aggregates built of anionic cyanine dyes and dications of viologens. Thus, we discuss the self-assembly of highly organized structures in which, along with photosensitive exciton semiconductors from organic dyes, π-conjugated organic molecules are included that can participate in secondary dark processes of separation of charges of Frenkel excitons.
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Original Russian Text © B.I. Shapiro, E.V. Manulik, 2018, published in Rossiiskie Nanotekhnologii, 2018, Vol. 13, Nos. 3–4.
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Shapiro, B.I., Manulik, E.V. Aggregation of Anionic Cyanine Dyes by Electron-Withdrawing Organic Polycations. Nanotechnol Russia 13, 97–102 (2018). https://doi.org/10.1134/S1995078018020118
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DOI: https://doi.org/10.1134/S1995078018020118