期刊
APPLIED SCIENCES-BASEL
卷 11, 期 21, 页码 -出版社
MDPI
DOI: 10.3390/app112110038
关键词
far-IR spectroscopy; terahertz gap; phospholipid membranes; phosphatidylcholine; phosphatidylethanolamine; hydrogen-bonding continuum; hydration water
This study investigated the vibrational signature of two different phospholipids in the far-infrared region to evaluate the effect of headgroup composition on intermolecular interactions. The presence of additional hydrogen bonds in phosphatidylethanolamine (PE) compared to phosphatidylcholine (PC) affected water penetration and severely reduced the hydration capability of PE lipids.
The vibrational signature in the far-infrared region of two different phospholipids, phosphatidylcholine (PC) and phosphatidylethanolamine (PE), was investigated as a function of relative humidity from 0 to 75% in order to evaluate the effect of headgroup composition on the formation of intermolecular interactions. The substructures of the frequency region between 50 and 300 cm(-1) were identified, and changes in the frequency and intensity of the related vibrations with hydration were analyzed. Interestingly, in PE, two additional vibrational bands with respect to PC were found at 162 and 236 cm(-1) and assigned to intermolecular hydrogen bonds between the hydrogen-bond-donating groups, -NH3+, and hydrogen-bond-accepting groups, -P-O- and -COO, of adjacent molecules. The presence of these interactions also affected the penetration of water, severely reducing the hydration capability of PE lipids.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据