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Interfacial Water Structure in Langmuir Monolayer and Gibbs Layer Probed by Sum Frequency Generation Vibrational Spectroscopy
Author(s) -
Zhang Zhen,
Guo Yuan
Publication year - 2012
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201100620
Subject(s) - monolayer , chemistry , langmuir , langmuir adsorption model , hydrogen bond , gibbs free energy , spectroscopy , analytical chemistry (journal) , crystallography , molecule , thermodynamics , adsorption , organic chemistry , biochemistry , physics , quantum mechanics
Langmuir monolayer and Gibbs layer exhibit surface‐active properties and it can be used as simple model systems to investigate the physicochemical properties of biological membranes. In this report, we presented the OH stretching vibration of H 2 O in the 4′′‐ n ‐pentyl‐4‐cyano‐ p ‐terphenyl (5CT), nonadecanenitrile (C 18 CN) Langmuir monolayer and compared them with CH 3 CN Gibbs layer at the air/water interface with polarization SFG‐VS. This study demonstrated that the hydrogen bond network is different in the Langmuir monolayer of 5CT, C 18 CN from CH 3 CN Gibbs layer at the air/water interface which showed two different water structures on the different surface layer. The results provided a deeper insight into understanding the hydrogen bond on the interfaces.