Conclusions
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1.
The triplet states of some dimethylamino ketones were recorded, and their kinetic spectral characteristics in various solvents were studied.
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2.
A splitting of the T-T spectra of some symmetrical polyenic bis-dimethylamino ketones was observed, which is explained by the interaction of the chromophores.
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3.
The energies of the lower triplet states of a number of dyes were estimated; their values are determined by the chromophore with the longer polymethine chain.
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4.
In toluene the interaction of the chromophores has no effect on the position of the first triplet level of the dyes, probably because of their relatively small energy when compared with the value of the barrier that is created by the connecting C=Ogroup. In propanol this effect is manifested due to decrease in the C=O barrier.
Literature cited
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1421–1425, June, 1983.
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Shvedova, L.A., Borisevich, Y.E., Tatikolov, A.S. et al. Study of triplet states of some ketocyanine dyes, the polyenic bis-ω,ω′-dimethylamino ketones. Russ Chem Bull 32, 1290–1293 (1983). https://doi.org/10.1007/BF00953178
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DOI: https://doi.org/10.1007/BF00953178