Investigation of tautomeric composition of cytosine by multiphoton excitation spectra. II. Two-photon absorption spectra
Burova, T.G.; Nurlygaianova, M.N.; Ten, G.N.
Biofizika 59(2): 265-270
2014
ISSN/ISBN: 0006-3029 PMID: 25702477 Document Number: 673699
For the first time the quantum-mechanical calculations of intensity distribution in the two-photon absorption spectra of the six tautomeric forms of cytosine were performed. It has been confirmed that in the aqueous solution of cytosine (pH 3.0) there exist several tauromeric forms: canonical amino-oxo tautomeric form, cation, as well as cys-imino-oxo and cys-amino-hydroxy tautomers.