Orientation and motion of water molecules at air/water interface

被引：48

作者：

Gan, W ^{[1
]}

Wu, D ^{[1
]}

Zhang, Z ^{[1
]}

Guo, Y ^{[1
]}

Wang, HF ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing 100080, Peoples R China

来源：

CHINESE JOURNAL OF CHEMICAL PHYSICS | 2006年 / 19卷 / 01期

关键词：

air/water interface; water molecules; orientation and motion;

D O I：

10.1360/cjcp2006.19(1).20.5

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Here we report a quantitative study of the orientational structure and motion of water molecule at the air/water interface. Analysis of Sum Frequency Generation (SFG) vibrational peak of the free O-H stretching band at 3700 cm(-1) in four experimental configurations showed that orientational motion of water molecule at air/water interface is libratory within a limited angular range. The free OH bond of the interfacial water molecule is tilted around 33 degrees from the interface normal and the orientational distribution or motion width is less than 15 degrees. This picture is significantly different from the previous conclusion that the interfacial water molecule orientation varies over a broad range within the ultrafast vibrational relaxation time, the only direct experimental study concluded for ultrafast and broad orientational motion of a liquid interface by Wei et al. (Phys. Rev. Lett. 86, 4799, (2001)) using single SFG experimental configuration.

引用

页码：20 / 24

页数：5

共 42 条

[1] Hydrogen bond dynamics at water/organic liquid interfaces [J].

Benjamin, I .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (28) :13711-13715

[2] Chemical reactions and solvation at liquid interfaces: A microscopic perspective [J].

Benjamin, I .

CHEMICAL REVIEWS, 1996, 96 (04) :1449-1475

[3] VIBRATIONAL-SPECTRUM OF WATER AT THE LIQUID/VAPOR INTERFACE [J].

BENJAMIN, I .

PHYSICAL REVIEW LETTERS, 1994, 73 (15) :2083-2086

[4] SURFACE-ROUGHNESS OF WATER MEASURED BY X-RAY REFLECTIVITY [J].

BRASLAU, A ;

DEUTSCH, M ;

PERSHAN, PS ;

WEISS, AH ;

ALSNIELSEN, J ;

BOHR, J .

PHYSICAL REVIEW LETTERS, 1985, 54 (02) :114-117

[5] CAPILLARY WAVES ON THE SURFACE OF SIMPLE LIQUIDS MEASURED BY X-RAY REFLECTIVITY [J].

BRASLAU, A ;

PERSHAN, PS ;

SWISLOW, G ;

OCKO, BM ;

ALSNIELSEN, J .

PHYSICAL REVIEW A, 1988, 38 (05) :2457-2470

[6] Structure and vibrational spectroscopy of salt water/air interfaces: Predictions from classical molecular dynamics simulations [J].

Brown, EC ;

Mucha, M ;

Jungwirth, P ;

Tobias, DJ .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (16) :7934-7940

[7] The analysis of interference effects in the sum frequency spectra of water interfaces [J].

Brown, MG ;

Raymond, EA ;

Allen, HC ;

Scatena, LF ;

Richmond, GL .

JOURNAL OF PHYSICAL CHEMISTRY A, 2000, 104 (45) :10220-10226

[8] Determination of the two methyl group orientations at vapor/acetone interface with polarization null angle method in SFG vibrational spectroscopy [J].

Chen, H ;

Gan, W ;

Wu, BH ;

Wu, D ;

Zhang, Z ;

Wang, HF .

CHEMICAL PHYSICS LETTERS, 2005, 408 (4-6) :284-289

[9] Determination of structure and energetics for Gibbs surface adsorption layers of binary liquid mixture 1. Acetone + water [J].

Chen, H ;

Gan, W ;

Wu, BH ;

Wut, D ;

Guo, Y ;

Wang, HF .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (16) :8053-8063

[10] Determination of structure and energetics for Gibbs surface adsorption layers of binary liquid mixture 2. Methanol plus water [J].

Chen, H ;

Gan, W ;

Lu, R ;

Guo, Y ;

Wang, HF .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (16) :8064-8075

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