Significant Chiral Signal Amplification of Langmuir Monolayers Probed by Second Harmonic Generation

	Significant Chiral Signal Amplification of Langmuir Monolayers Probed by Second Harmonic Generation
	Lv, Kai; Lin, Lu; Wang, Xiaoyu; Zhang, Li; Guo, Yuan; Lu, Zhou; Liu, Minghua
刊名	journal of physical chemistry letters
	2015-05-07
卷号	6 期号:9 页码:1719-1723
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.
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
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
收录类别	SCI
语种	英语
WOS记录号	WOS:000355014900038
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/146256]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	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
推荐引用方式 GB/T 7714	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.
APA	Lv, Kai.,Lin, Lu.,Wang, Xiaoyu.,Zhang, Li.,Guo, Yuan.,...&Liu, Minghua.(2015).Significant Chiral Signal Amplification of Langmuir Monolayers Probed by Second Harmonic Generation.journal of physical chemistry letters,6(9),1719-1723.
MLA	Lv, Kai,et al."Significant Chiral Signal Amplification of Langmuir Monolayers Probed by Second Harmonic Generation".journal of physical chemistry letters 6.9(2015):1719-1723.