Investigation of the acid-base properties of 2-[2-(4-methoxy-phenylamino)- vinyl]-1,3,3-trimethyl-3H-indolium reagent

Vasil Andruch, Ioseph S. Balogh, Yaroslav R. Bazel, Ferenc Billes, Mihály Kádár, Roland Karosi, Gyula Parlagh, József Posta, András Simon, Rastislav Serbin, Marcel Torok

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The acid-base properties of 2-[2-(4-methoxy-phenylamino)-vinyl]-1,3,3- trimethyl-3H-indolium dye were investigated. The reagent exists in a reactive single charged form over a wide range of acidity, from pH 8 to -2.5 H 0. The optimum analytical wavelength of the single charged form is 412 nm, where the molar absorptivity is 4.06 × 104 dm 3 mol-1 cm-1. Mechanisms of protonation and hydrolysis were discussed. The results suggest the applicability of the dye as an effective analytical reactant. Quantum chemical calculations of the structural and spectral properties of the dye were also carried out.

Original languageEnglish
Pages (from-to)551-557
Number of pages7
JournalActa Chimica Slovenica
Volume54
Issue number3
Publication statusPublished - Oct 31 2007

Keywords

  • 2-[2-(4-Methoxy-phenylamino)-vinyl]-1,3,3-trimethyl-3H-indolium
  • Acid-base properties
  • Spectrophotometry

ASJC Scopus subject areas

  • Chemistry(all)

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