Absorption spectra of some amino acids in crystalline phase in a terahertz (THz) frequency range (< 100 cm/sup -1/) were investigated by coherent time-domain spectroscopy. Most of amino acids show characteristic absorption peaks. Some of those peak frequencies show strong and extraordinary temperature dependence, which is difficult to explain by anharmonisity of a single potential alone. We show that the temperature dependence of the peak frequencies is well explained by a model based on double-well potentials of the normal modes.
Terahertz time-domain spectroscopy of crystalline amino acids
01.01.2003
132656 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Terahertz Time-Domain Spectroscopy of Crystalline Amino Acids
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