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O. L. Pavlenko, V. A. Brusentsov, O. P. Dmytrenko, M. М. Seryk, V. A. Sendiuk, M. P. Kulish, A. M. Gaponov, Yu. L. Slominskyy, V. V. Kurdyukov, and O. D. Kachkovsky
«Aggregation of Squaraine Dyes in the Deposited Films»
589–597 (2017)

PACS numbers: 78.20.Ci, 78.40.-q, 78.66.-w, 78.67.Sc, 81.16.Fg, 82.30.Fi

Aggregation of squaraine dyes that manifests itself in the absorption spectra of films obtained by a vacuum deposition is studied. Quantum-chemical calculations are performed, and spectral characteristics of various types of aggregates formed for squaraine dyes are determined. As shown, the aggregation of squaraine dyes of the ‘tail-to-head’ type leads to shift of the absorption maximum into the long-wavelength region, while aggregation of the ‘brick masonry’ type leads to shift into the short-wavelength region, in comparison with the absorption spectra of monomeric molecules of squaraine dyes.

Key words: thin films, squaraine dyes, aggregation, absorption spectra, quantum-chemical calculations.

https://doi.org/10.15407/nnn.15.04.0589

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