2-4-4 低波数Raman分光法を用いたTBA/TBP bromideハイドレートのゲスト分子相互作用の差異

抄録

Tetrabutylammonium/phosphonium bromide (TBAB/TBPB) hydrates, ionic clathrate hydrates were investigated by low frequency Raman scattering including in Terahertz (THz) region. The peak position and full-width-half-maximum (FWHM) of each hydrate were compared in the region below 3 THz (100 cm^-1) . The position of the peak considered to be the translational movement of the anion was about 65 cm^-1 in TBAB, which was clearly higher than TBPB. This is considered to be due to difference of contribution to center cation in atomic charge distribution. In addition, FWHM is may be due to the crystal structure and reflects the interaction between the anion and the water molecule. Direct observation of intermolecular interactions using spectroscopy in the terahertz region can be used to assess the influence of guest molecule differences on material characteristics.