@article{7543,
  author = {U. H. Verkerk and J. F. Zhao and I. S. Saminathan and J. K. C. Lau and J. Oomens and A. C. Hopkinson and K. W. M. Siu},
  title = {Infrared Multiple-Photon Dissociation Spectroscopy of Tripositive Ions: Lanthanum-Tryptophan Complexes},
  abstract = {Collision-induced charge disproportionation limits the stability of triply charged metal ion complexes and has thus far prevented successful acquisition of their gas-phase IR spectra. This has curtailed our understanding of the structures of triply charged metal complexes in the gas phase and in biological environments. Herein we report the first gas-phase IR spectra of triply charged La-III complexes with a derivative of tryptophan (N-acetyl tryptophan methyl ester), and an unusual dissociation product, a lanthanum amidate. These spectra are compared with those predicted using density functional theory. The best structures are those of the lowest energies that differ by details in the a-interaction between La3+ and the indole rings. Other binding sites on the tryptophan derivative are the carbonyl oxygens. In the lanthanum amidate, La3+ replaces an H+ in the amide bond of the tryptophan derivative.},
  year = {2012},
  journal = {Inorganic Chemistry},
  volume = {51},
  pages = {4707-4710},
  month = {Apr},
  isbn = {0020-1669},
  doi = {10.1021/ic2026973},
  language = {English},
}