A fourier transform infrared study of bilayer membranes of double-chain ammonium amphiphiles

Naotoshi Nakashima, Norihiro Yamada, Toyoki Kunitake, Junzo Umemura, Tohru Takenaka

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Fourier transform infrared spectroscopy was applied to an examination of the phase transition behavior of aqueous bilayer membranes of double-chain ammonium amphiphiles. Large spectral changes were observed at the respective gel-to-liquid crystal phase transitions (Tc) of the bilayers. The frequency change in the antisymmetric CH2 stretching band indicated formation of the gauche conformation at Tc. The ester groups became either hydrated or disordered in the liquid crystalline state, but the amide units remained strongly associated. It is concluded that intermolecular hydrogen bonding is not necessarily weakened at Tc, although the molecular packing is loosened.

Original languageEnglish
Pages (from-to)3374-3377
Number of pages4
JournalJournal of Physical Chemistry
Issue number15
Publication statusPublished - Jan 1 1986


All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physical and Theoretical Chemistry

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