Effects of chromophore interaction in photophysics and photochemistry of cyanine dyes
Spectral and fluorescent properties of ketocyanine dyes (polyenic bis-ω,ω′-aminoketones) and cation-anionic polymethine dyes of various structures were studied. The symmetric ketocyanines were shown to have a long-wavelength absorption band bathochromically shifted in comparison with that of the asy...
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| Format: | Article |
| Language: | English |
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Wiley
2000-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/S1110662X00000040 |
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| author | A. S. Tatikolov Zh. A. Krasnaya L. A. Shvedova V. A. Kuzmin |
| author_facet | A. S. Tatikolov Zh. A. Krasnaya L. A. Shvedova V. A. Kuzmin |
| author_sort | A. S. Tatikolov |
| collection | DOAJ |
| description | Spectral and fluorescent properties of ketocyanine dyes (polyenic bis-ω,ω′-aminoketones) and
cation-anionic polymethine dyes of various structures were studied. The symmetric ketocyanines were shown
to have a long-wavelength absorption band bathochromically shifted in comparison with that of the asymmetric
ketocyanines with the same total length of the polyenic chain. The nonlinear ketocyanines exhibit
the additional short-wavelength band in their absorption spectra, which can be more intense than the longwavelength
band. The absorption spectra of ion pairs of cation-anionic dyes with overlapping cation and
anion bands contain a new intense short-wavelength band inactive in fluorescence excitation. These spectral
peculiarities are explained on the basis of chromophore interaction model. It has also been shown that the
T1 levels of ketocyanine chromophores do not essentially interact with each other in a ketocyanine molecule
in nonpolar solvents; in polar solvents this interaction becomes appreciable due to lowering the potential
barrier for conjugation. |
| format | Article |
| id | doaj-art-52f9b2bef7b54cca84091aa028c0931e |
| institution | Kabale University |
| issn | 1110-662X |
| language | English |
| publishDate | 2000-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-52f9b2bef7b54cca84091aa028c0931e2025-02-03T07:25:09ZengWileyInternational Journal of Photoenergy1110-662X2000-01-0121233010.1155/S1110662X00000040Effects of chromophore interaction in photophysics and photochemistry of cyanine dyesA. S. Tatikolov0Zh. A. Krasnaya1L. A. Shvedova2V. A. Kuzmin3Institute of Biochemical Physics, Russian Academy of Sciences, Kosygin Str. 4, Moscow 117334, RussiaInstitute of Organic Chemistry, Russian Academy of Sciences, Leninsky Pr. 47, Moscow 117913, RussiaInstitute of Biochemical Physics, Russian Academy of Sciences, Kosygin Str. 4, Moscow 117334, RussiaInstitute of Biochemical Physics, Russian Academy of Sciences, Kosygin Str. 4, Moscow 117334, RussiaSpectral and fluorescent properties of ketocyanine dyes (polyenic bis-ω,ω′-aminoketones) and cation-anionic polymethine dyes of various structures were studied. The symmetric ketocyanines were shown to have a long-wavelength absorption band bathochromically shifted in comparison with that of the asymmetric ketocyanines with the same total length of the polyenic chain. The nonlinear ketocyanines exhibit the additional short-wavelength band in their absorption spectra, which can be more intense than the longwavelength band. The absorption spectra of ion pairs of cation-anionic dyes with overlapping cation and anion bands contain a new intense short-wavelength band inactive in fluorescence excitation. These spectral peculiarities are explained on the basis of chromophore interaction model. It has also been shown that the T1 levels of ketocyanine chromophores do not essentially interact with each other in a ketocyanine molecule in nonpolar solvents; in polar solvents this interaction becomes appreciable due to lowering the potential barrier for conjugation.http://dx.doi.org/10.1155/S1110662X00000040 |
| spellingShingle | A. S. Tatikolov Zh. A. Krasnaya L. A. Shvedova V. A. Kuzmin Effects of chromophore interaction in photophysics and photochemistry of cyanine dyes International Journal of Photoenergy |
| title | Effects of chromophore interaction in photophysics and photochemistry of cyanine dyes |
| title_full | Effects of chromophore interaction in photophysics and photochemistry of cyanine dyes |
| title_fullStr | Effects of chromophore interaction in photophysics and photochemistry of cyanine dyes |
| title_full_unstemmed | Effects of chromophore interaction in photophysics and photochemistry of cyanine dyes |
| title_short | Effects of chromophore interaction in photophysics and photochemistry of cyanine dyes |
| title_sort | effects of chromophore interaction in photophysics and photochemistry of cyanine dyes |
| url | http://dx.doi.org/10.1155/S1110662X00000040 |
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