Pyrylocyanines. 35. Squarylium dyes based on <i>tert</i>-butyl-substituted pyrylium and thiopyrylium salts

Authors

  • В. В. Курдюков Institute of Organic Chemistry, National Academy of Sciences (NAN) of the Ukraine, Kiev 252056
  • М. А. Кyдинова Institute of Organic Chemistry, National Academy of Sciences (NAN) of the Ukraine, Kiev 252056
  • А. И. Толмачев Institute of Organic Chemistry, National Academy of Sciences (NAN) of the Ukraine, Kiev 252056

Abstract

Squarylium dyes based on isomeric di(tert-butyl)methyl-substituted pyrylium, thiopyrylium, and benzopyrylium salts have been synthesized. The dye containing 4,6-di(tert-butyl)pyrylium residues was converted to its analog with methylpyridinium residues. The PMR and electronic absorption spectra of the dyes obtained were investigated. It was established that deepening of the color from dicarbocyanines to squaraines is characteristic only of dyes containing heterocyclic residues with high or medium electron-donor capacity. For dyes containing heterocyclic residues with low electron-donor capacity the opposite pattern is observed.

How to Cite
Kurdyukov, V. V.; Kudinova, M. A.; Tolmachev, A. I. Chem. Heterocycl. Compd. 1996, 32, 891. [Khim. Geterotsikl. Soedin. 1996, 1038.]

For this article in the English edition, see DOI https://doi.org/10.1007/BF01176962

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Published

1996-08-25

Issue

No. 8 (1996)

Section

Original Papers