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AbstractThis article contains basic information on the structure of polymethine dyes, their absorption and fluorescence spectra, and practical applications in various areas of science and engineering. Keywords: polymethine dyes; electron structure; electron transitions; chromophores; spectral sensitization; photopolymerization; quantum electronics; laser dyes; absorption spectra; fluorescence spectra; fluorescence labels; nonlinear optics; electronic photography; ion recognition | |||||