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电化学  2011 

和频振动光谱研究多晶金电极/溶液界面乙腈分子取向的flip-flop行为

, PP. 134-138

Keywords: 和频振动光谱,取向反转,金电极,乙腈

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Abstract:

用和频振动光谱研究乙腈/金电极界面,观测到乙腈的甲基振动峰强度随施加的电极电势而变化.当电极电势越过零电荷电势(pzc)时,甲基振动峰符号发生反转,这意味着基团取向发生反转(flip-flop).由此推断出乙腈分子在金电极界面的吸附构型.即在零电荷电势下,电极界面吸附的乙腈分子构型为甲基靠近电极表面而腈基远离电极表面;而高于零电荷电势则电极界面吸附的乙腈分子构型发生反转,变为腈基靠近电极表面而甲基远离电极表面的构型.

References

[1]  Yao Jian-Lin, Yuan Ya-Xian, Fan Xiao-Min, et al. The reorientation of benzonitrile on platinum electrode probed by surface enhanced Raman spectroscopy[J]. J Electroanal Chem, 2008, 624(1/2): 129-133.
[2]  Rudneva A V, Molodkinaa E B, Danilova A I, et al. Adsorption behavior of acetonitrile on platinum and gold electrodes of various structures in solution of 0.5M H2SO4[J]. Electrochimica Acta, 2009, 54: 3692-3699.
[3]  Ataka K,Osawa M. In situ infrared study of water-sulfate coadsorption on gold(111) in sulfuric acid solutions[J]. Langmuir, 1998, 14(4): 951-959.
[4]  Toney M F, Howard J N, Richer J, et al. Voltage-dependent ordering of water molecules at an electrode-electrolyte interface[J]. Nature, 1994, 368: 444-446.
[5]  Lucas C A, Thompson P, Cormack M, et al. Temperature-induced ordering of metal/adsorbate structures at electrochemical interfaces[J]. J Am Chem Soc, 2009, 131: 7654-7661.
[6]  Duan Sai, Wu De-Yin, Xu Xin, et al. Structures of water molecules adsorbed on a gold electrode under negative potentials[J]. J Phys Chem C, 2010, 114 (9): 4051-4056.
[7]  Markovits A, Minot C. Theoretical study of the acetonitrile flip-flop with the electric field orientation: adsorption on a Pt(111) electrode surface[J]. Catalysis Letters, 2003, 91(3/4):225-234.
[8]  Raschke M B,Shen Y R. Nonlinear optical spectroscopy of solid interfaces[J]. Current Opinion in Solid State and Materials Science, 2004, 8: 343-352.
[9]  Hopkins A J, McFearin C L,Richmond G L. Investigations of the solid-aqueous interface with vibrational sum-frequency spectroscopy[J]. Current Opinion in Solid State and Materials Science, 2005, 9: 19-27.
[10]  Somorjai G A ,Park J Y. Concepts, instruments, and model systems that enabled the rapid evolution of surface science[J]. Sur Sci, 2009, 603: 1293-1300.
[11]  Vidal F,Tadjeddine A. Sum-frequency generation spectroscopy of interfaces[J]. Rep Prog Phys, 2005, 68: 1095-1127.
[12]  Noguchi H, Okada T, Uosaki K. SFG study on potential-dependent structure of water at Pt electrode/electrolyte solution interface[J]. Electrochimica Acta, 2008, 53: 6841-6844.
[13]  Nihonyanagi S, Ye S, Uosaki K,et al. Potential-dependent structure of the interfacial water on the gold electrode[J]. Sur Sci, 2004, 573: 11-16.
[14]  Schultz Z D, Shaw S K,Gewirth A A. Potential dependent organization of water at the electrified metal-liquid interface[J]. J Am Chem Soc, 2005, 127: 15916-15922.
[15]  Zheng W Q,Tadjeddine A. Adsorption processes and structure of water molecules on Pt(110) electrodes in perchloric solutions[J]. J Chem Phys, 2003, 119 (24): 13096-13099.
[16]  Peremans A,Tadjeddine A. Electrochemical deposition of hydrogen on platinum single crystals studied by infrared-visible sum-frequency generation[J]. J Chem Phys, 1995, 103 (16): 7197-7203.
[17]  Tadjeddine A,Peremans A. Vibrational spectroscopy of the electrochemical interface by visible infrared sum frequency generation[J]. J Electroanal Chem, 1996, 409: 115-121.
[18]  Noguchi H, Okada T, Uosaki K. Molecular structure at electrode/electrolyte solution interfaces related to electrocatalysis[J]. Faraday Discuss, 2008, 140: 125-137.
[19]  Baldelli S, Mailhot G, Ross P N, et al. Potential-dependent vibrational spectroscopy of solvent molecules at the Pt(111) electrode in a water/acetonitrile mixture studied by sum frequency generation[J]. J Am Chem Soc, 2001, 123: 7697-7702.
[20]  Baldelli S, Mailhot G, Ross P, et al. Potential dependent orientation of acetonitrile on platinum (111) electrode surface studied by sum frequency generation[J]. J Phys Chem B, 2001, 105: 654-662.
[21]  Roke S, Kleyn A W, Bonn M, Femtosecond sum frequency generation at the metal-liquid interface[J]. Sur Sci, 2005, 593: 79-88.
[22]  Casillas-Ituarte N N,Allen H C. Interfacial organization of acetonitrile: simulation and experiment[J]. Chem Phy Lett, 2009, 483: 84-89.
[23]  Faguy P W, Fawcett W R, Liu G,et al. A study of the adsorption of acetonitrile on a gold electrode from aqueous solutions using in situ vibrational spectroscopy[J]. J Electroanal Chem, 1992, 339: 339-353.
[24]  Waldrup S B, Williams C T. Acetonitrile adsorption on polycrystalline platinum: an in situ investigation using sum frequency spectroscopy[J]. J Phys Chem C, 2008, 112: 219-226.
[25]  Ding F, Hu Z H, Zhong Q, et al. Interfacial organization of acetonitrile: simulation and experiment[J]. J Phys Chem C, 2010, 114(41): 17651-17659.
[26]  Wang Hong-fei, Gan Wei, Lu Rong, et al.Quantitative spectral and orientational analysis in surface sum frequency generation vibrational spectroscopy (SFG-VS)[J]. Int Rev Phy Chem, 2005, 24: 191-256.
[27]  Miranda P B,Shen Y R. Liquid interfaces: A study by sum-frequency vibrational spectroscopy[J]. J Phys Chem B, 1999, 103(17): 3292-3307.
[28]  Zhuang X, Miranda P B, Kim D,et al. Mapping molecular orientation and conformation at interfaces by surface nonlinear optics[J]. Phys Rev B, 1999, 59(19): 12632-12640.
[29]  Zheng De-Sheng, Wang Yuan, Liu An-An, et al. Microscopic molecular optics theory of surface second harmonic generation and sum-frequency generation spectroscopy based on the discrete dipole lattice model[J]. Int Rev Phy Chem, 2008, 27(4): 629-664.
[30]  Bockris J O M, Reddy A K N. Modern electrochemistry 2A[M]. New York, Boston: Kluwer Academic Publishers, 2002.
[31]  Renato C A, Gewirth A A. Characterization of water structure on silver electrode surfaces by SERS with two-dimensional correlation spectroscopy[J]. Anal Chem, 2010, 82(4): 1305-1310.

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