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题名: Heterochiral Domain Formation in Homochiral alpha-Dipalmitoylphosphatidylcholine (DPPC) Langmuir Monolayers at the Air/Water Interface
作者: Lin, Lu1, 2;  Liu, Anan1, 2;  Guo, Yuan1
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2012-07-19
DOI: 10.1021/jp2110314
卷: 116, 期:28, 页:14863-14872
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: alpha-Dipalmitoylphosphatidylcholine (DPPC) Langmuir monolayers at the air/water interface are an important biomimetic system. Previous studies using optical imaging have shown that enantiomerically pure DPPC molecules form periodical homochiral domains with close packing. However, it is unclear whether the chirality of these domains is stable or dynamic. Recently, we investigated the chirality of L-DPPC Langmuir monolayers using second-harmonic-generation linear dichroism (SHG-LD). The change in the degree of chiral excess (DCE) and its sign with time indicated that the chirality transformed from homochiral to heterochiral domains, with an associated change in handedness. Here we propose that hydrolysis of L-DPPC is responsible for the formation of the opposite chiral state. On the basis of quantum chemistry calculations and effective pair potential (EPP) theory, we give a molecular explanation for this transformation. These results provide an insight into the lipid monolayers that the chiral state of domains composed of chiral lipids is dynamic.
关键词[WOS]: AIR-WATER-INTERFACE ;  FREQUENCY VIBRATIONAL SPECTROSCOPY ;  SUPPORTED LIPID-BILAYERS ;  INTRINSIC BENDING FORCE ;  PHOSPHOLIPID FLIP-FLOP ;  AMPHIPHILIC ASSEMBLIES ;  MOLECULAR CHIRALITY ;  HELICAL STRUCTURES ;  NONLINEAR OPTICS ;  REAL-TIME
语种: 英语
WOS记录号: WOS:000306503200016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142988
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100190, Peoples R China

Recommended Citation:
Lin, Lu,Liu, Anan,Guo, Yuan. Heterochiral Domain Formation in Homochiral alpha-Dipalmitoylphosphatidylcholine (DPPC) Langmuir Monolayers at the Air/Water Interface[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2012,116(28):14863-14872.
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