| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 28544 | Journal of Photochemistry and Photobiology A: Chemistry | 2006 | 9 Pages |
Abstract
Linear (one-photon) and nonlinear (two-photon) spectral properties of 4-N,N-dimethylamino-4â²-aminoazobenzene have been investigated under protonation in DMSO/water solvent mixtures. Observed spectral changes have been discussed in terms of ammonium-azonium tautomerism. The corresponding tautomeric constants have been determined for the first time for such kind of tautomeric equilibria. The process of protonation leads to changes of the two-photon absorption properties, suggesting that such process could be used as a tool for change of third-order nonlinear optical activity in solution.
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Authors
Liudmil Antonov, Kenji Kamada, Daniela Nedeltcheva, Koji Ohta, Fadhil S. Kamounah,