Three-color luminescent transformation of the julolidine pyrylo/pyridocyanine dyes in the adsorbed state

Vladimir V. Shelkovnikov, Irina Yu Kargapolova, Sergey V. Korotaev, Natalia A. Orlova, Tatyana V. Rybalova, Igor P. Chuikov

Research output: Contribution to journalArticlepeer-review

Abstract

Pyrylocyanine dyes with julolidinyl donor groups are used for determination of aromatic amines on silica gel. The formed julolidine pyridocyanines are unstable on silica support and give bright three-color luminescent products: initial red proceeds to green and blue. The latter appear due to oxidation and dehydration of the julolidine cycle in the pyridocyanine dye formed. The structures of pyridocyanine oxidized forms were established by X-ray and NMR methods. The luminescence spectra transformations of the pyridocyanines on silica support and the evidence of the chemical and photochemical oxidation by the air oxygen are represented.

Original languageEnglish
Pages (from-to)181-190
Number of pages10
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume375
DOIs
Publication statusPublished - 15 Apr 2019

Keywords

  • Aromatic amine reaction
  • Julolidinyl pyrylo- and pyridocyanines
  • Oxidation
  • Photooxidation of julolidinyl cycle
  • Silica support
  • Three-color luminescence

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