Jump to main content
Jump to site search

Issue 8, 1986
Previous Article Next Article

Prototropic equilibria of some Harmala alkaloids in acid solutions: proton-induced fluorescence quenching of the monocations of harmaline and harmalol

Abstract

Absorption and fluorescence spectra of harman homologues in acid solutions have shown the presence of mono-, di-, and tri-cations. Fluorescence spectra for the various cations at 77 K and their quantum yields at 298 K are reported. The acidity constants indicate that these alkaloids are more basic in the excited singlet state than in the ground state. The proton-induced fluorescence quenching rate constant for the monovalent cations is observed to be of the order of 109 dm3 mol–1 s–1 for harmaline and harmalol and considerably less for harman, harmine, and harmol.

Back to tab navigation

Article type: Paper
DOI: 10.1039/P29860001247
J. Chem. Soc., Perkin Trans. 2, 1986, 1247-1251

  •   Request permissions

    Prototropic equilibria of some Harmala alkaloids in acid solutions: proton-induced fluorescence quenching of the monocations of harmaline and harmalol

    M. Krishnamurthy and S. K. Dogra, J. Chem. Soc., Perkin Trans. 2, 1986, 1247
    DOI: 10.1039/P29860001247

Search articles by author

Spotlight

Advertisements