Jump to main content
Jump to site search

Issue 4, 2017
Previous Article Next Article

Mathematical description of pH-stat kinetic traces measured during photochemical quinone decomposition

Author affiliations

Abstract

Substituted 1,4-benzoquinone (QR) derivatives are photosensitive in aqueous solution and form hydroquinones (QR-H2) and hydroxy-quinones (QR-OH), two weak acids in their photoreaction. For this reason, the kinetics of the photoreaction can be conveniently followed by the pH-stat titration technique. The mathematical description of the kinetic traces measured provides the two main parameters of the photoreaction: the differential quantum yield of the reaction (Φ) and the ratio of the two photo-products, i.e. the fraction of QR that is converted to QR-OH (α). These values are described in this paper for 2,5-dichloro-1,4-benzoquinone at different pH values, together with the detailed mathematical evaluation of the application limits of the pH-stat method for such reactions.

Graphical abstract: Mathematical description of pH-stat kinetic traces measured during photochemical quinone decomposition

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 08 Sep 2016, accepted on 23 Nov 2016 and first published on 24 Nov 2016


Article type: Paper
DOI: 10.1039/C6PP00333H
Citation: Photochem. Photobiol. Sci., 2017,16, 519-526
  •   Request permissions

    Mathematical description of pH-stat kinetic traces measured during photochemical quinone decomposition

    V. Kiss, G. Lehoczki and K. Ősz, Photochem. Photobiol. Sci., 2017, 16, 519
    DOI: 10.1039/C6PP00333H

Search articles by author