Photoinduced tautomeric transformations of xanthurenic acid

Photoinduced tautomeric transformations of xanthurenic acid Full article

Journal

Physical Chemistry Chemical Physics
ISSN: 1463-9076 , E-ISSN: 1463-9084

Output data

Year: 2010, Volume: 12, Number: 32, Pages: 9502-9515 Pages count : 14 DOI: 10.1039/c000735h

Authors

Yanshole Vadim V. ¹ , Sherin Peter S. ¹ , Gritsan Nina P. ² , Snytnikova Olga A. ¹ , Mamatyuk Victor I. ³ , Grilj Jakob ⁴ , Vauthey Eric ⁴ , Sagdeev Renad Z. ¹ , Tsentalovich Yuri P. ¹

Affiliations

1	(Данные Web of science) SB RAS, Int Tomog Ctr, Novosibirsk 630090, Russia
2	(Данные Web of science) SB RAS, Inst Chem Kinet & Combust, Novosibirsk 630090, Russia
3	(Данные Web of science) Novosibirsk Organ Chem Inst, Novosibirsk 630090, Russia
4	(Данные Web of science) Univ Geneva, Dept Phys Chem, CH-1211 Geneva 4, Switzerland

The properties of xanthurenic acid (XAN) in ground and photoexcited states have been studied using steady-state and time-resolved optical methods as well as quantum chemistry calculations. In neutral aqueous solution and in alcohols, XAN is present in a single tautomeric form (keto form), whereas in aprotic solvents and probably in basic aqueous solutions, more than one tautomeric form is present. UV irradiation of aqueous and alcoholic solutions of XAN results in a very rapid solvent-assisted tautomerization to the enol form, the later undergoes solvent-assisted transformation back to the keto form. The photolysis of XAN in aprotic solvents gives rise to the formation of numerous intermediate forms of XAN in both triplet and ground states. Under intense laser irradiation, XAN undergoes biphotonic ionization, the precursor for ionization being the excited singlet state.

Yanshole V.V. , Sherin P.S. , Gritsan N.P. , Snytnikova O.A. , Mamatyuk V.I. , Grilj J. , Vauthey E. , Sagdeev R.Z. , Tsentalovich Y.P.
Photoinduced tautomeric transformations of xanthurenic acid
Physical Chemistry Chemical Physics. 2010. V.12. N32. P.9502-9515. DOI: 10.1039/c000735h WOS Scopus РИНЦ

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