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	Inhomogeneous and spontaneous formation of chirality in the langmuir monolayer of achiral molecules at the air/water interface probed by in situ surface second harmonic generation linear dichroism
	Xu, Yan-yan1,2; Rao, Yi1,2; Zheng, De-sheng1,2; Guo, Yuan1; Liu, Ming-hua1; Wang, Hong-fei1
刊名	Journal of physical chemistry c
	2009-03-12
卷号	113期号:10页码:4088-4098
ISSN号	1932-7447
DOI	10.1021/jp810509u
通讯作者	Wang, hong-fei(hongfei@iccas.ac.cn)
英文摘要	The chirality of the langmuir monolayer at different surface densities formed with achiral 5-octadecyloxy-2-(2-pyridylazo)phenol (parc18) molecules at the air/water interface was measured with the in situ optical second harmonic generation linear dichroism (shg-ld) technique. using the s-polarization detection curve in shg-ld, the degree of chiral excess (dce) in the langmuir monolayer can be determined as accurately as 2%. we found that the parc18 langmuir monolayer was chiral and the degree of chirality varied randomly between the two opposite chiral states in the same monolayer at different surface densities and at different locations, suggesting coexistence of the various enantiomers simultaneously in the parc18 langmuir monolayer. this inhomogeneity of the monolayer chirality was independent of the laser power and wavelength as well as the surface density and the surface pressure, and the chiral domains distributed randomly in the langmuir monolayer. we also found that the chirality in the parc18 langmuir monolayer was spontaneously formed upon molecular aggregation, instead of being compression induced. there was no apparent magnetic dipole contribution observed throughout the different surface densities in the parc18 langmuir monolayer. these results indicate that the shg-ld technique is not only an effective in situ probe of the interface chirality but also an effective tool to study the dynamic processes in the close-packed monolayer or in the self-assembled films.
WOS关键词	SUM-FREQUENCY GENERATION ; 2ND HARMONIC-GENERATION ; NONLINEAR-OPTICAL ACTIVITY ; AIR-WATER-INTERFACE ; SPECTROSCOPY SFG-VS ; SUPRAMOLECULAR CHIRALITY ; VIBRATIONAL SPECTROSCOPY ; CIRCULAR-DICHROISM ; LIQUID INTERFACES ; BLODGETT-FILMS
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000263975000030
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2394443
专题	中国科学院大学
通讯作者	Wang, Hong-fei
作者单位	1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Xu, Yan-yan,Rao, Yi,Zheng, De-sheng,et al. Inhomogeneous and spontaneous formation of chirality in the langmuir monolayer of achiral molecules at the air/water interface probed by in situ surface second harmonic generation linear dichroism[J]. Journal of physical chemistry c,2009,113(10):4088-4098.
APA	Xu, Yan-yan,Rao, Yi,Zheng, De-sheng,Guo, Yuan,Liu, Ming-hua,&Wang, Hong-fei.(2009).Inhomogeneous and spontaneous formation of chirality in the langmuir monolayer of achiral molecules at the air/water interface probed by in situ surface second harmonic generation linear dichroism.Journal of physical chemistry c,113(10),4088-4098.
MLA	Xu, Yan-yan,et al."Inhomogeneous and spontaneous formation of chirality in the langmuir monolayer of achiral molecules at the air/water interface probed by in situ surface second harmonic generation linear dichroism".Journal of physical chemistry c 113.10(2009):4088-4098.

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