Surface Structural Studies of Methanesulfonic Acid at Air /Aqueous Solution Interfaces Using Vibrational Sum Frequency Spectroscopy

Allen, Heather C.; Raymond, Elizabeth A.; Richmond, Geraldine L.

doi:10.1021/jp0032964

Cited by 90 publications

(159 citation statements)

References 45 publications

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“…Vibrational sum frequency generation spectroscopy experiments have mainly been performed using scanning SFG instruments with pulse-widths in the ps (picosecond) [15][16][17][18][19] or ns (nanosecond) [20][21][22][23] time regime that produce relatively narrow spectral bandwidths. In a scanning SFG system the nonlinear crystals used to convert a portion of the visible wavelength beam to an infrared beam are angle tuned.…”

Section: Introductionmentioning

confidence: 99%

Broadband Vibrational Sum Frequency Generation Spectroscopy of a Liquid Surface

Hommel

Allen

2001

ANAL. SCI.

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Atmospheric aerosol surface chemistry, polar stratospheric cloud surface chemistry, and soil-water interfacial chemistry are examples of environmentally relevant interfaces that are not well understood at the molecular level. In light of the need to understand the molecular-level details of one of these interfacial systems, we demonstrate here advances in the field of surface spectroscopy, in particular, broad-bandwidth sum frequency generation (BBSFG) spectroscopy.Broad-bandwidth sum frequency generation technology is gaining recognition for studying solid-surface structure and chemistry. 6-13 However, acquiring BBSFG spectra from liquid surfaces has been more elusive due to the inherently small nonlinear response from many liquid surfaces. Nevertheless, we show here, for the first time, BBSFG spectra obtained from a liquid surface.There have been a significant number of surface spectra published using scanning SFG instruments from liquid surfaces; however, until now a BBSFG spectrum from a liquid surface had not been obtained. A new double-amplifier design, which is explained in a previously published paper 14 was used for the acquisition of these BBSFG spectra. The data presented in this paper show that BBSFG can now be successfully utilized to probe the vibrational modes of molecules at liquid surfaces. We also demonstrate the time-resolved capability of this BBSFG system to acquire data in as few as 500 ms.Visible-infrared BBSFG spectroscopy provides molecularlevel information about molecular species at an interface in the form of polarization-dependent vibrational data from the surface molecules. The strength of BBSFG spectroscopy lies in its inherent ability to attain a full surface spectrum within one pulse of the laser system, thus potentially allowing temporally resolved spectroscopic data from reactions occurring at an interface.Vibrational sum frequency generation spectroscopy experiments have mainly been performed using scanning SFG instruments with pulse-widths in the ps (picosecond) [15][16][17][18][19] or ns (nanosecond) 20-23 time regime that produce relatively narrow spectral bandwidths. In a scanning SFG system the nonlinear crystals used to convert a portion of the visible wavelength beam to an infrared beam are angle tuned. The angle tuning causes small directional changes in the beam path, which can affect the spatial overlap of the two incident beams at the sample surface. This can compromise the spectral reproducibility and the shape of the scanning SFG spectrum. Scanning SFG systems, by the nature of the system, are primarily used on equilibrium or static interfaces. Although scanning sum frequency instruments are still considered stateof-the-art for surface spectroscopic technology, a new generation of broad-bandwidth (non-scanning) SFG instruments have taken center-stage because of their ability to capture a full spectrum within one pulse of the laser, thereby providing timeresolved surface data in addition to static or equilibrium surface data.Although sum frequency generation has b...

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Section: Introductionmentioning

confidence: 99%

Broadband Vibrational Sum Frequency Generation Spectroscopy of a Liquid Surface

Hommel

Allen

2001

ANAL. SCI.

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“…Allen et al [16] reported that the presence of MSA enhances the coordination between interfacial water molecules, and that the oxygen atoms of MSA significantly form hydrogen bonds with the free OH. On the other hand, the study of Li et al [23] supports the fact that the hydration of MSA by a small number of water molecules is thermodynamically highly favored.…”

Section: Resultsmentioning

confidence: 99%

“…MSA is also one of the atmospheric oxidation products of dimethyl sulfide [13][14][15] and it is known to be efficient in forming aerosol particles which serve as cloud condensation nuclei [16].…”

Section: Introductionmentioning

confidence: 99%

Interaction of water with methanesulfonic acid on Pt single crystal electrodes

Sandoval

Suárez-Herrera

Climent

et al. 2015

Electrochemistry Communications

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The electrochemical behavior of methanesulfonic acid on platinum single crystal electrode surfaces is investigated by cyclic voltammetry and infrared spectroscopy measurements.The results are compared with those characteristic of perchloric and trifluoromethanesulfonic acids. The differences on the voltammetric profile are interpreted in terms of the effect of the anion on the structure of water. No adsorbed species are detected by infrared spectroscopy.

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“…It has been shown that the structure of water is further altered at charged interfaces. 3,5,[15][16][17][18][19] Because of this charge induced change in the interfacial water structure, experiments were initiated to determine the effect of charged interfaces on molecular orientational dynamics.…”

Section: Introductionmentioning

confidence: 99%

Molecular Rotation at Negatively Charged Surfactant/Aqueous Interfaces

2006

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The effect of charge on the rotational dynamics of the molecular probe coumarin 314 (C314) at air/water interfaces covered with the negatively charged surfactant sodium dodecyl sulfate (SDS) was investigated using femtosecond time-resolved second harmonic spectroscopy. The out-of-plane orientational time constant at the highest SDS surface coverage of 100 Å 2 per molecule is 383 ( 9 ps. The rotational dynamics is slower than at the air/water interface where the out-of-plane reorientational time constant is 336 ( 6 ps. At the air/water interface the rotational dynamics is over three times slower than the bulk orientational diffusion time of 100 ps. The relatively small effect of the surfactant charge density on the C314 rotation time constant is surprising, considering the marked dependence of the C314 orientation, spectra, and surfactant phase diagram on surfactant density.

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Surface Structural Studies of Methanesulfonic Acid at Air /Aqueous Solution Interfaces Using Vibrational Sum Frequency Spectroscopy

Cited by 90 publications

References 45 publications

Broadband Vibrational Sum Frequency Generation Spectroscopy of a Liquid Surface

Broadband Vibrational Sum Frequency Generation Spectroscopy of a Liquid Surface

Interaction of water with methanesulfonic acid on Pt single crystal electrodes

Molecular Rotation at Negatively Charged Surfactant/Aqueous Interfaces

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