ACIDIC PROPERTIES OF HYPERICIN AND ITS OCTAHYDROXY ANALOG IN THE GROUND AND EXCITED-STATES

Authors
FREEMAN D FROLOW F KAPINUS E LAVIE D LAVIE G MERUELO D MAZUR Y
Citation
D. Freeman et al., ACIDIC PROPERTIES OF HYPERICIN AND ITS OCTAHYDROXY ANALOG IN THE GROUND AND EXCITED-STATES, Journal of the Chemical Society, Chemical Communications, (7), 1994, pp. 891-892
Citations number
25
Categorie Soggetti
Chemistry
Journal title
Journal of the Chemical Society, Chemical Communications → ACNP
ISSN journal
00224936
Issue
7
Year of publication
1994
Pages
891 - 892
Database
ISI
SICI code
0022-4936(1994):7<891:APOHAI>2.0.ZU;2-1
Abstract
pH dependent absorption and fluorescence spectra of hypericin 1 and it s octahydroxy analogue 3 demonstrate their acidic properties, their de protonation occurring in the ground and excited states from OH in the bay region and in the peri position to the carbonyl, respectively; the presence of the anion of 1 in the crystalline state is established by X-ray diffraction.