Formation and study of thin films oftert-butyl-substituted thiopyrylium dyes |
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Authors: | V V Shelkovnikov T N Gerasimova Z M Ivanova N A Orlova |
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Institution: | (1) Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 9 prosp. Lavrent'eva, 630090 Novosibirsk, Russian Federation |
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Abstract: | The formation of thin films of symmetrical and asymmetrical thiopyrylium dyes, containingtert-butyl substituents, on glass supports was studied. The films were deposited by centrifugation of solutions of individual
dyes or dye—polymer poly(methyl methacrylate)] compositions. The dye: polymer ratios necessary for the formation of WORM
recording layers based on these dyes were determined. The use of a polymeric matrix increases the film thickness and optical
density but decreases its reflection power and does not allow crystallization of the dye on the support to be completely avoided.
An increase in the number oftert-butyl groups in the dye molecule prevents crystallization of the recording layer in the case of symmetrical dye molecules,
but does not prevent it for asymmetrical molecules. The data obtained were interpreted in terms of geometrical views on the
interaction of dye molecules in thin layers.
Translated fromIzestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1343–1349, July, 1998. |
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Keywords: | thiopyrylium dyes tert-butyl substituents thin films electronic absorption spectra structure of layers intermolecular interactions |
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