@article{6901,
  author = {J. M. Bakker and R. K. Sinha and T. Besson and M. Brugnara and P. Tosi and J . Y. Salpin and P. Maitre},
  title = {Tautomerism of Uracil Probed via Infrared Spectroscopy of Singly Hydrated Protonated Uracil},
  abstract = {Tautomerism of the nucleobase uracil is characterized in the gas phase through IR photodissociation spectroscopy of singly hydrated protonated uracil created with tandem mass spectrometric methods in a commercially available Fourier transform ion cyclotron resonance mass spectrometer. Protonated Uracil ions generated by electrospray ionization are re-solvated ill a low-pressure collision cell filled with a mixture of water vapor seeded in argon. Their structure is investigated by IR photodissociation spectroscopy in the NH and OH stretching region (2500-3800 cm(-1)) with a tabletop IR laser Source and in the 1000-2000 cm(-1) range with a free-electron laser. In both regions the IR photodissociation spectrum exhibits well-resolved spectral signatures that point to the presence of two different types of structure for monohydrated protonated uracil, which result from the two lowest-energy tautomers of uracil. Ab initio calculations confirm that no water-catalyzed tautomerization occurs during the re-solvation process, indicating that the two protonated forms of uracil directly originate from the electrospray process.},
  year = {2008},
  journal = {Journal of Physical Chemistry A},
  volume = {112},
  number = {48},
  pages = {12393-12400},
  month = {Dec},
  isbn = {1089-5639},
  url = {<Go to ISI>://000261218100014 },
  note = {ISI Document Delivery No.: 376YETimes Cited: 0Cited Reference Count: 46},
  language = {English},
}