Novel method for accurate determination of the orientational angle of interfacial chemical groups

doi:10.1360/03wb0071

CORC > 化学研究所 > 中国科学院化学研究所

	Novel method for accurate determination of the orientational angle of interfacial chemical groups
	Lu, R ; Gan, W ; Wang, HF
刊名	CHINESE SCIENCE BULLETIN
	2003-10-01
卷号	48 期号:20 页码:2183-2187
关键词	Sum Frequency Generation Vibrational Spectra Null Angle Orientation Angle Methyl Methanol Orientation Parameter
ISSN号	1001-6538
DOI	10.1360/03wb0071
英文摘要	The 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.
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000186305600007
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/80503]
专题	中国科学院化学研究所
通讯作者	Wang, HF
作者单位	1.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
推荐引用方式 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.