Vibrational sum frequency generation spectroscopy of the air/water interface

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	Vibrational sum frequency generation spectroscopy of the air/water interface
	Sun, Q.1; Guo, Y.2
刊名	JOURNAL OF MOLECULAR LIQUIDS
	2016
卷号	213 页码:28-32
关键词	Air/water interface Bulk water Hydrogen bonding SFG Raman
英文摘要	Vibrational sum frequency generation (SFG) spectroscopy is employed to investigate the water structure at an air/water interface. By obtaining the SFG intensity using different polarizations, it is reasonable to deconvolute the conventional SFG spectrum into five sub -bands, which are located at 3100, 3200, 3400, 3550 and 3700 cm(-1). In comparison with the Raman OH stretching bands of liquid water, we suggest that the five fitted sub -bands can be attributed to OH vibrations engaged in various local hydrogen-bonded networks, such as single donor-double acceptor (DAA), double donor-double acceptor (DDAA), single donor-single acceptor (DA), double donor-single acceptor (DDA), and free-OH vibrations, respectively. Owing to the truncations of hydrogen bonds at the air/water interface, obvious structural differences between interfacial water and bulk water can be expected. For ambient water, both DA and DDAA are the primary hydrogen-bonded networks. By contrast, DA hydrogen bonding can be regarded as the primary structural motif at the air/water interface. Additionally, we suggest that the loss of DDAA hydrogen bonding at the air/water interface provides the physical origin of surface tension, which can be applied to understand the formation of a water droplet. (C) 2015 Elsevier B.V. All rights reserved.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/33813]
专题	化学研究所_其它
作者单位	1.Peking Univ, Sch Earth & Planetary Sci, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Sun, Q.,Guo, Y.. Vibrational sum frequency generation spectroscopy of the air/water interface[J]. JOURNAL OF MOLECULAR LIQUIDS,2016,213:28-32.
APA	Sun, Q.,&Guo, Y..(2016).Vibrational sum frequency generation spectroscopy of the air/water interface.JOURNAL OF MOLECULAR LIQUIDS,213,28-32.
MLA	Sun, Q.,et al."Vibrational sum frequency generation spectroscopy of the air/water interface".JOURNAL OF MOLECULAR LIQUIDS 213(2016):28-32.