Author/Authors :
Hoshina، نويسنده , , Hiromichi and Ozaki، نويسنده , , Atsumi and Itagaki، نويسنده , , Yusuke and Yajima، نويسنده , , Setsuko and Suzuki، نويسنده , , Hal and Ishii، نويسنده , , Shinya and Ishida، نويسنده , , Misaki and Uchiyama، نويسنده , , Tetsuji and Kimura، نويسنده , , Keiichi and Otani، نويسنده , , Chiko and Hoshina، نويسنده ,
Abstract :
Terahertz (THz) absorption spectra of organogels consisting of (1R,2R)-1,2-bis(dodecanoylamino)cyclohexane/2-nitrophenyl octyl ether (RR-BDC/NPOE) and RR-BDC/n-dodecane were measured by Fourier-transform far-infrared (FT-FIR) spectroscopy. The vibrational peaks of the gels were observed at the same frequencies as those of the pure gelator, suggesting that the intermolecular structure around the NH⋯OC hydrogen bond is maintained in the gel phase. Temperature-dependent spectroscopy showed a drastic spectral change at the sol–gel transition temperature, in which the vibrational peak at 3.5 THz disappears and a new peak appears at 2.9 THz. The change in THz vibrational frequency is indicative of the structural collapse of the hydrogen-bonded fibrous architecture in the sol phase.
