Vibrational polarization spectroscopy of CH stretching modes of the methylene goup at the vapor/liquid interfaces with sum frequency generation

	Vibrational polarization spectroscopy of CH stretching modes of the methylene goup at the vapor/liquid interfaces with sum frequency generation
	Lu, R; Gan, W; Wu, BH; Chen, H; Wang, HF
刊名	journal of physical chemistry b
	2004-06-03
卷号	108 期号:22 页码:7297-7306
英文摘要	in this paper we report detailed examples of the surface sum frequency generation vibrational spectroscopy (sfg-vs) as a polarization spectroscopic technique for vibrational spectral band assignment and orientational analysis for molecular groups at the interfaces. surface sum frequency generation vibrational spectroscopy (sfg-vs) has been widely used as an important spectroscopy probe for chemical bonding, structural conformation and molecular interactions of both fundamentally and technologically important interfaces. however, the potential for sfg-vs as a polarization spectroscopic technique is yet to be fully explored. in ir and raman studies, polarized spectroscopy (ps) can provide information on molecular symmetries, which is necessary for accurate vibrational band assignment in complex chemical environments. we shall show that sfg-vibrational polarization spectroscopy (vps) is the polarization spectroscopic tool on this purpose for the interface, along with its advantage of submonolayer sensitivity. this ability of sfg-vps comes from the fact that vibrational bands from different symmetry types do not have strongest peak intensities in the same polarization configuration of the sfg-vps spectra, because molecular groups are aligned or partially aligned at the interface. we chose to study the sfg-vps of three diols, namely, ethylene glycol, 1,3-propanediol, and 1.5-pentanediol, at the vapor/liquid interfaces as model systems for the methylene-only molecules. the polarization analysis of the sfg spectra resulted in few explicit polarization selection rules or guidelines for the assignment of the ch stretching modes of the methylene groups. these results could be used to provide clarifications for some of the disagreements and controversies still exist in the literatures. these results can also shed light on the ir and raman studies on methylene group in the bulk condensed phases.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, physical
研究领域[WOS]	chemistry
关键词[WOS]	air-water-interface ; liquid-liquid interface ; normal-alkyl chains ; raman-scattering ; 2nd-harmonic generation ; hydrophobic surfaces ; polymethylene chains ; phase-transitions ; fermi resonances ; polymer surfaces
收录类别	SCI
语种	英语
WOS记录号	WOS:000221700300054
公开日期	2015-11-10
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/139482]
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, Inst Chem, Ctr Mol Sci, State Key Lab Mol React Dynam, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Lu, R,Gan, W,Wu, BH,et al. Vibrational polarization spectroscopy of CH stretching modes of the methylene goup at the vapor/liquid interfaces with sum frequency generation[J]. journal of physical chemistry b,2004,108(22):7297-7306.
APA	Lu, R,Gan, W,Wu, BH,Chen, H,&Wang, HF.(2004).Vibrational polarization spectroscopy of CH stretching modes of the methylene goup at the vapor/liquid interfaces with sum frequency generation.journal of physical chemistry b,108(22),7297-7306.
MLA	Lu, R,et al."Vibrational polarization spectroscopy of CH stretching modes of the methylene goup at the vapor/liquid interfaces with sum frequency generation".journal of physical chemistry b 108.22(2004):7297-7306.