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C. BERMUDEZ, I. PENA, C. CABEZAS, A. M. DALY, S. MATA, J. L. ALONSO, Grupo de Espectroscopía Molecular (GEM), Edificio Quifima, Laboratorios de Espectroscopía y Bioespectroscopía, Parque Científico, Universidad de Valladolid, 47011 Valladolid, Spain.
The conformational behavior of ketohexoses D-Fructose, L-Sorbose, D-Tagatose and D-Psicose has been revealed from their rotational spectra. A broadband microwave spectrometer (CP-FTMW)\footnoteG.~G.~Brown, B.~C.~Dian, K.~O.~Douglass, S.~M.~Geyer, S.~T.~Shipman, B.~H.~Pate, Rev. Sci. Instrum. \textbf2008, 79 , 053103. combined with a laser ablation (LA) source\footnoteS.~Mata, I.~Peña, C.~Cabezas, J.~C.~López, J.~L.~Alonso, J. Mol. Spectrosc. \textbf2012, 280 , 91. has been used to rapidly acquire the rotational spectra in the 6 to 12 GHz frequency range. All observed species are stabilized by complicated intramolecular hydrogen-bonding networks. Structural motifs related to the sweetness of ketohexoses are revealed.