Photophysical properties of some pyrichromine derivatives
Authors:
- Bronisław Marciniak,
- H. Kozubek,
- S. Paszỳc
Abstract
The absorption-emission characteristics, photophysical properties and acid-base equilibria of trimethylated pyrichrominium ions in the ground and lowest excited singlet and triplet states were studied. Analysis of the lifetime quantum yield data indicated that at 77 K fluorescence and phosphorescence are the main processes of deactivation of the excited states for the A+ and HA2+ forms. The strong temperature dependence of the fluorescence of the protonated form HA2+ is discussed on the basis of a phototautomerization reaction. The acidities in the excited singlet and triplet states are several pKa units higher than those in the ground state. The trimethylpyrichrominium ions in water undergo a slow photochemical reaction in the presence of oxygen. © 1985.
- Record ID
- UAMa66ca311ed014919b901b1f580b8866c
- Author
- Journal series
- Journal of Photochemistry, ISSN 0047-2670
- Issue year
- 1985
- Vol
- 28
- Pages
- 529-536
- ASJC Classification
- ; ;
- DOI
- DOI:10.1016/0047-2670(85)87046-5 Opening in a new tab
- Language
- (en) English
- Score (nominal)
- 0
- Score source
- journalList
- Publication indicators
- = 6; = 9
- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/article/UAMa66ca311ed014919b901b1f580b8866c/
- URN
urn:amu-prod:UAMa66ca311ed014919b901b1f580b8866c
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.