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Features of Complexation of a Styryl Dye Dimethylamino Derivative with Cucurbit[7]uril.

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Title: Features of Complexation of a Styryl Dye Dimethylamino Derivative with Cucurbit[7]uril.
Authors: Ivanov, D. A.1 (AUTHOR) ivanovd@photonics.ru, Kolesnikova, O. P.2 (AUTHOR), Kryukov, I. V.1 (AUTHOR), Petrov, N. Kh.1,2 (AUTHOR)
Source: High Energy Chemistry. Jun2025, Vol. 59 Issue 3, p222-226. 5p.
Subjects: Electrostatic fields, Inclusion compounds, Absorption spectra, Double bonds, Excited states, Cucurbituril
Abstract: The features of complexation of the styryl dye 4-{(E)-2-[4-(dimethylamino)phenyl]vinyl}-1-methylpyridinium iodide (DASPI) in an aqueous solution of cucurbit[7]uril (CB7) have been studied using steady-state and time-resolved fluorescence spectroscopy. It has been found that the formation of 1 : 2 inclusion complexes causes significant changes in the absorption spectra and stimulates emission from a higher excited electronic state in the 400 nm band. Using fluorescence titration in this band, the binding constants have been determined as log K1 = 5.5 and log K2 = 5.1 for the 1 : 1 and 1 : 2 DASPI–CB7 inclusion complexes, respectively. These changes can be attributed to the influence of the electrostatic field of the CB7 portals on the conjugated system of DASPI double bonds. [ABSTRACT FROM AUTHOR]
Copyright of High Energy Chemistry is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Features of Complexation of a Styryl Dye Dimethylamino Derivative with Cucurbit[7]uril.
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  Data: The features of complexation of the styryl dye 4-{(E)-2-[4-(dimethylamino)phenyl]vinyl}-1-methylpyridinium iodide (DASPI) in an aqueous solution of cucurbit[7]uril (CB7) have been studied using steady-state and time-resolved fluorescence spectroscopy. It has been found that the formation of 1 : 2 inclusion complexes causes significant changes in the absorption spectra and stimulates emission from a higher excited electronic state in the 400 nm band. Using fluorescence titration in this band, the binding constants have been determined as log K1 = 5.5 and log K2 = 5.1 for the 1 : 1 and 1 : 2 DASPI–CB7 inclusion complexes, respectively. These changes can be attributed to the influence of the electrostatic field of the CB7 portals on the conjugated system of DASPI double bonds. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of High Energy Chemistry is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1134/S0018143925700031
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Inclusion compounds
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      – SubjectFull: Absorption spectra
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      – SubjectFull: Double bonds
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      – SubjectFull: Excited states
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      – SubjectFull: Cucurbituril
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      – TitleFull: Features of Complexation of a Styryl Dye Dimethylamino Derivative with Cucurbit[7]uril.
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              Text: Jun2025
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