Nuclear magnetic resonance investigations of the Azo-Hydrazone tautomerism of azoreactive dye chromophores

Csaba Szántay, Zsuzsanna Csepregi, Péter Aranyosi, István Rusznák, L. Tőke, András Víg

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

High-field 1H and 13C NMR methods (e.g. 1H{1H} and 13C{1H} NOE spectroscopy) were used to examine the tautomeric characteristics, particularly with regard to the question of azo-hydrazone tautomerism, of two azo dyes. Full 1H and 13C NMR signal assignments are given for both molecules. The NMR results indicate that in DMSO solution the tautomeric equilibria are shifted predominantly toward the hydrazone from II in both compounds. The presence of a fast II ⇋ III interconversion could also be plausibly assumed.

Original languageEnglish
Pages (from-to)306-310
Number of pages5
JournalMagnetic Resonance in Chemistry
Volume35
Issue number5
Publication statusPublished - May 1997

Fingerprint

Hydrazones
hydrazones
Chromophores
chromophores
Coloring Agents
Dyes
dyes
Nuclear magnetic resonance
nuclear magnetic resonance
Azo Compounds
Azo dyes
Dimethyl Sulfoxide
Spectroscopy
Molecules
spectroscopy
molecules

Keywords

  • C NMR
  • H NMR
  • Azo-hydrazone tautomerism
  • Dye chromophores
  • NMR
  • NOE

ASJC Scopus subject areas

  • Chemistry(all)
  • Physical and Theoretical Chemistry
  • Spectroscopy

Cite this

Nuclear magnetic resonance investigations of the Azo-Hydrazone tautomerism of azoreactive dye chromophores. / Szántay, Csaba; Csepregi, Zsuzsanna; Aranyosi, Péter; Rusznák, István; Tőke, L.; Víg, András.

In: Magnetic Resonance in Chemistry, Vol. 35, No. 5, 05.1997, p. 306-310.

Research output: Contribution to journalArticle

Szántay, C, Csepregi, Z, Aranyosi, P, Rusznák, I, Tőke, L & Víg, A 1997, 'Nuclear magnetic resonance investigations of the Azo-Hydrazone tautomerism of azoreactive dye chromophores', Magnetic Resonance in Chemistry, vol. 35, no. 5, pp. 306-310.
Szántay, Csaba ; Csepregi, Zsuzsanna ; Aranyosi, Péter ; Rusznák, István ; Tőke, L. ; Víg, András. / Nuclear magnetic resonance investigations of the Azo-Hydrazone tautomerism of azoreactive dye chromophores. In: Magnetic Resonance in Chemistry. 1997 ; Vol. 35, No. 5. pp. 306-310.
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