| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 29238 | Journal of Photochemistry and Photobiology A: Chemistry | 2007 | 8 Pages |
Abstract
By means of UV/Vis absorption spectroscopy, NMR measurements and kinetic modelling, two spironaphthoxazine compounds bearing 5-OAlk substituent have been investigated in neutral and acidified ethanol media. The kinetics of ring opening/ring closure and the equilibrium constant, the quantum yield of photocoloration, the molar absorption coefficients of the neutral and protonated open forms and pKa values have been determined. A three-species photoreversible transformation between the closed form, the open form and the protonated open form has been observed in slightly acidified solutions.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Bioengineering
Authors
E.B. Gaeva, V. Pimienta, S. Delbaere, A.V. Metelitsa, N.A. Voloshin, V.I. Minkin, G. Vermeersch, J.C. Micheau,