Low-frequency vibrations of crystalline α,α-trehalose dihydrate

Masae Takahashi, Yoshiyuki Kawazoe, Yoichi Ishikawa, Hiromasa Ito

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


Low-frequency vibrations below 200 cm-1 of crystalline α,α-trehalose dihydrate were observed by far-infrared spectroscopy. Peaks were classified to (1) strong and less sharp and (2) weak and sharp. By density functional theory calculations, two strong peaks at 67.7 and 75.9 cm-1 are assigned to the torsion modes of two hydroxymethyl groups combined with the hydrogen torsional motion of two water molecules. A sharp peak at 49.3 cm-1 appearing at 4 K is assigned to the translational motion of water molecule. Several sharp peaks of single crystal sample below 60 cm-1 showed polarization dependence at 4 K.

Original languageEnglish
Pages (from-to)371-377
Number of pages7
JournalChemical Physics Letters
Issue number4-6
Publication statusPublished - 2006 Oct 5


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