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Correlation between excited-state intramolecular proton-transfer and singlet-oxygen quenching activities in 1-(acylamino)anthraquinones.
- Source :
-
The journal of physical chemistry. B [J Phys Chem B] 2015 Feb 12; Vol. 119 (6), pp. 2525-32. Date of Electronic Publication: 2014 Oct 14. - Publication Year :
- 2015
-
Abstract
- Excited-state intramolecular proton-transfer (ESIPT) and singlet-oxygen ((1)O2) quenching activities of intramolecularly hydrogen-bonded 1-(acylamino)anthraquinones have been studied by means of static and laser spectroscopies. The ESIPT shows a substituent effect, which can be explained in terms of the nodal-plane model. The ESIPT activity positively and linearly correlates with their (1)O2 quenching activity. The reason for this correlation can be understood by considering ESIPT-induced distortion of their ground-state potential surface and their encounter complex formation with (1)O2. Intramolecularly hydrogen-bonded hydroxyanthraquinones found in aloe also show a similar positive and linear correlation, which can be understood in the same way.
- Subjects :
- Anthraquinones chemistry
Protons
Singlet Oxygen chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1520-5207
- Volume :
- 119
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- The journal of physical chemistry. B
- Publication Type :
- Academic Journal
- Accession number :
- 25275947
- Full Text :
- https://doi.org/10.1021/jp508355k