ICCAS OpenIR
Novel method for accurate determination of the orientational angle of interfacial chemical groups
Lu, R; Gan, W; Wang, HF
2003-10-01
Source PublicationCHINESE SCIENCE BULLETIN
ISSN1001-6538
Volume48Issue:20Pages:2183-2187
AbstractThe common practice for determination of orientational angle of interfacial molecular groups with the interfacial sum frequency generation vibrational spectroscopy (SFG-VS) is to measure the intensity ratio between two SFG intensities at a certain vibrational frequency with different polarization directions. Because sometimes the SFG at one polarization direction is too weak to be measure accurately, this ratio usually has big uncertainty, and consequently it is impossible to obtain accurate orientation parameters. Thus the corresponding orientation angle was not accurately calculated. Through analyzing the basic relationship between the orientation angle and SFG intensity, we found that the null angle method would be suitable for such cases. The null. angle measurement is simple, precise and easy to realize, therefore can greatly improve the accuracy of orientation angle. Using this method, we determined the orientation angle of the methyl group of methanol orients about 31.8 +/- 2.4degrees from the surface normal at the air/methanol interface, much more accurate than the previously reported value of <42&DEG;. The null angle method provides a reliable experimental analytical tool for studying the orientation of the chemical group or chemical bond at interfaces.
KeywordSum Frequency Generation Vibrational Spectra Null Angle Orientation Angle Methyl Methanol Orientation Parameter
DOI10.1360/03wb0071
Indexed BySCI
Language英语
WOS IDWOS:000186305600007
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:52[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80504
Collection中国科学院化学研究所
Corresponding AuthorWang, HF
Affiliation1.Chinese Acad Sci, State Key Lab Mol React Dynam, Ctr Mol Sci, Inst Chem, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Lu, R,Gan, W,Wang, HF. Novel method for accurate determination of the orientational angle of interfacial chemical groups[J]. CHINESE SCIENCE BULLETIN,2003,48(20):2183-2187.
APA Lu, R,Gan, W,&Wang, HF.(2003).Novel method for accurate determination of the orientational angle of interfacial chemical groups.CHINESE SCIENCE BULLETIN,48(20),2183-2187.
MLA Lu, R,et al."Novel method for accurate determination of the orientational angle of interfacial chemical groups".CHINESE SCIENCE BULLETIN 48.20(2003):2183-2187.
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