The Flip-Flop Behavior of Acetonitrile at Au Electrode Surface Investigated by Sum Frequency Generation Vibrational Spectroscopy

Authors

Zhi HUANG, 1. State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry Chinese Academy of Sciences, Beijing, 100190,China; ;
Xin TANG, 1. State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry Chinese Academy of Sciences, Beijing, 100190,China; ;
Gang-hua DENG, 1. State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry Chinese Academy of Sciences, Beijing, 100190,China; ;
En-cai ZHOU, 2.Tianjin AidaHengsheng Technology co.Ltd, Tianjin 300200;
Hong-fei WANG, 3. Division of Scientific Resource Environmental Molecular Science Laboratory Pacific Northwest National Laboratory;
Yuan GUO, 1. State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry Chinese Academy of Sciences, Beijing, 100190,China; ;Follow

Corresponding Author

Yuan GUO(guoyuan@iccas.ac.cn)

Abstract

The electrochemical interface between liquid acetonitrile and polycrystal gold electrode is investigated by in situ infrared visible sum frequency generation spectroscopy (SFG-VS). The structure of acetonitrile adsorbed at polycrystal gold electrode surface is studied as a function of electrode potential. The SFG spectra of CH3 group indicate acetonitrile orients in response to the electrode potential. The SFG signal of CH3 group turns lower as the electrode potential changes from -700mV to 300mV, and vanishes around the 300mV(pzc), then becomes a negative signal above 500mV, which indicates that the orientation is predominately with the CH3 group toward the metal between -700 and 300mV and with the CN group toward the metal above 300 mV. It is the first time to observe the flip-flop behavior of acetonitrile dipole at the polycrystal gold electrode surface, from which we may infer that the flip-flop behavior of acetonitrile is a common phenomenon.

Graphical Abstract

Keywords

sum frequency generation vibrational spectroscopy, flip-flop, gold electrode, acetonitrile

DOI Link

https://doi.org/10.61558/2993-074X.2082

Publication Date

2011-05-28

Online Available Date

2011-05-06

Revised Date

2011-01-28

Received Date

2010-12-10

Recommended Citation

Zhi HUANG, Xin TANG, Gang-hua DENG, En-cai ZHOU, Hong-fei WANG, Yuan GUO. The Flip-Flop Behavior of Acetonitrile at Au Electrode Surface Investigated by Sum Frequency Generation Vibrational Spectroscopy[J]. Journal of Electrochemistry, 2011 , 17(2): 134-138.
DOI: 10.61558/2993-074X.2082
Available at: https://jelectrochem.xmu.edu.cn/journal/vol17/iss2/2