Molecular Behaviors of n-Fatty Acids in Liquid State.
-
- IWAHASHI Makio
- School of Science, Kitasato University
-
- KASAHARA Yasutoshi
- School of Science, Kitasato University
-
- MINAMI Hideyuki
- School of Science, Kitasato University
-
- MATSUZAWA Hideyo
- School of Science, Kitasato University
-
- SUZUKI Masao
- Advanced Science and Technology Research Center, Kyushu University
-
- OZAKI Yukihiro
- School of Science, Kwansei Gakuin University
Search this article
Abstract
Through near infrared spectroscopy and 13C-NMR spin-lattice relaxation time measurements it was revealed that the molecules of the normal fatty acids in the liquid state are strongly dimerized even at 363K by hydrogen bonding between their carboxylic groups. Thus, dimer molecules for the acids are the units in their intra- and intermolecular movements. The dynamic molecular and aggregate structures of the fatty acids (C8-C18) in the liquid state were estimated through the analyses of their self-diffusion coefficient D, viscosity η, molar volume and X-ray diffraction. The apparent hydrodynamic radius evaluated from D and η for the fatty acid was almost constant, irrespective of the hydrocarbon chain length. This suggests that only a longitudinal translation (translational movement along molecular axes) would be allowed for the dimer molecules of fatty acids. In addition, the distribution function curves obtained from the X-ray diffraction data suggest that, in the pure liquid state, rod-like fatty acid dimers highly aggregate in parallel and probably make clusters that would be randomly aligned.
Journal
-
- Journal of Oleo Science
-
Journal of Oleo Science 51 (3), 157-164, 2002
Japan Oil Chemists' Society
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390001204091772672
-
- NII Article ID
- 10008009692
-
- NII Book ID
- AA11503337
-
- ISSN
- 13473352
- 13458957
-
- NDL BIB ID
- 6066686
-
- Text Lang
- en
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed