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Citation: Wang Wei, Li Laiming, Xi Shiquan. Studies on Phase Transition Behavior of Anhydrous Phospholipid by lnfrared and Raman Spectroscopy[J]. Chinese Journal of Applied Chemistry, ;1994, 11(1): 92-95. shu

Studies on Phase Transition Behavior of Anhydrous Phospholipid by lnfrared and Raman Spectroscopy

1.
Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022

Received Date: 27 March 1993
Available Online: 27 September 1993

The temperature dependence of the infrared and Raman spectra of anhydrous dimyristoylphosphatidylethanolamine(DMPE) was investigated in the temperature rangefrom 290 to 405K. The spectra of the C-H,C=O and PO₂^- stretching mode regions reflectthat a cooperative phase transition occurs at about 365K. During the transition a significantlateral expansion of the lipid bilayer is present and accompanied both by an increased number of gauche rotamers within the hydrocarbon chain region and by muItiple conformers in boththe head group and glycerol backbone moieties. When the lipids are rapidly cooled,the acylchain region reorders without a concomitant reordering of the head group and interface region.
- dimyristoylphsphatidylethanolamine,
- molecular conformation,
- infrared spec-troscopy,
- Raman spectroscopy
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