n-ペンタデカン酸およびn-ヘプタデカン酸のB′型→←C′型可逆相転移

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  • n ペンタデカンサン オヨビ n ヘプタデカンサン ノ Bガタ Cガタ カギャ
  • On the B'⇄C' Reversible Phase Transition of n-Pentadecanoic Acid and n-Heptadecanoic Acid

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A reversible solid-state phase transition from the B' to C' form has been found in an odd number n-fatty acids. Structural changes on this phase transition of n-pentadecanoic acid and n-heptadecanoic acid were investigated by means of polarized infrared spectroscopy using an oriented specimens. The polarized infrared spectra of n-heptadecanoic acid before (B' form) and after (C' form) the phase transition show clear dichroism. The infrared spectral results showed that the B'⇄C' transition accompanied by a transformation of a subcell direction would proceed through an intermediate phase of the hexagonal H' subcell structure.

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