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题名: Significant Chiral Signal Amplification of Langmuir Monolayers Probed by Second Harmonic Generation
作者: Lv, Kai1;  Lin, Lu1;  Wang, Xiaoyu1;  Zhang, Li1;  Guo, Yuan1;  Lu, Zhou1;  Liu, Minghua1
刊名: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
发表日期: 2015-05-07
DOI: 10.1021/acs.jpclett.5b00472
卷: 6, 期:9, 页:1719-1723
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 ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science ;  Physics
英文摘要: With the development of the nonlinear optical technique such as SHG (second harmonic generation), the in situ measurements of the chirality in the monolayers at the air/water interface have become possible. However, when performing the SHG measurement of the chirality in a monolayer, it is still a great challenge to obtain the chiral signals with a good S/N (signal-to-noise) ratio. In this Letter, interfacial assemblies with induced supramolecular chirality were used to amplify the weak chiral SHG signals from the monolayers at the air/water interface. Tetrakis(4-sulfonatophenyl) porphyrin (TPPS) J aggregates were used as the subphase, and when chiral amphiphilic molecules were spread on it, chiral domains of the amphiphile/TPPS J aggregates were formed and then significantly amplified chiral signals that otherwise could not be detected. Moreover, the sign of the DCE (degree of chiral excess) changed with the chirality of the amphiphilic molecules, thus providing a possible way to obtain the absolute chiral information in situ in the monolayers.
关键词[WOS]: CIRCULAR-DICHROISM SPECTROSCOPY ;  NONLINEAR-OPTICAL PROPERTIES ;  SUM-FREQUENCY GENERATION ;  2ND HARMONIC-GENERATION ;  SUPRAMOLECULAR CHIRALITY ;  AIR/WATER INTERFACE ;  PENTACENE MONOLAYERS ;  ACHIRAL TPPS ;  IN-SITU ;  FILMS
语种: 英语
WOS记录号: WOS:000355014900038
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146256
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, CAS Key Lab Colloid Interface & Thermodynam, State Key Lab Mol React Dynam, Beijing Natl Lab Mol Sci,Inst Chem, Beijing 100190, Peoples R China

Recommended Citation:
Lv, Kai,Lin, Lu,Wang, Xiaoyu,et al. Significant Chiral Signal Amplification of Langmuir Monolayers Probed by Second Harmonic Generation[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2015,6(9):1719-1723.
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