2024-03-28T23:05:33Z
https://tsukuba.repo.nii.ac.jp/oai
oai:tsukuba.repo.nii.ac.jp:00028119
2022-04-27T08:56:10Z
2871:2875:2168
3:62:5592:2048
Pressure-induced association of oleic acid (OA) under varying temperature studied by multiple-perturbation two-dimensional (2D) IR correlation spectroscopy
源川, 拓磨
Shinzawa, Hideyuki
Genkawa, Takuma
Kanematsu, Wataru
© 2012 Elsevier B.V.
NOTICE: this is the author’s version of a work that was accepted for publication in Journal of molecular structure. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in PUBLICATION, Volume 1028 (2012) DOI:10.1016/j.molstruc.2012.06.039
Pressure-induced association of oleic acid (OA) under varying temperature was studied by multiple-perturbation two-dimensional (2D) IR correlation spectroscopy. Pressure-dependent ATR-IR spectra of OA were measured by imposing the static pressure ranging up to 12 MPa. Then variations of the IR spectra were captured over the temperature range of 20–40 °C. Multiple-perturbation 2D correlation analysis, coupled with the ATR-IR measurements, reveals association dynamics of OA molecules caused by the applied pressure. The compression first generates the liquid crystalline structure by aggregating the disordered dimer units. Further compression induces the development of the dimer via the assembling of the isolated monomers. In addition, the variation of the partial asynchronous correlation intensities induced by the change in temperature reveals the way the association dynamics is influenced by temperature. The increase in the temperature increased segmental motion of the alkyl chain, which in turn restricts the generation of the liquid crystalline structure based on the tightly packed dimer units.
Elsevier
2012-11
eng
journal article
http://hdl.handle.net/2241/118118
https://tsukuba.repo.nii.ac.jp/records/28119
10.1016/j.molstruc.2012.06.039
0022-2860
AA00702852
Journal of molecular structure
1028
164
169
https://tsukuba.repo.nii.ac.jp/record/28119/files/JMS_1028.pdf
application/pdf
593.2 kB
2013-12-25