Vibrational sum-frequency spectroscopy of an adsorbed monolayer of hexadecanol on water. Destructive interference of adjacent lines

Surface Structural Studies of Methane Sulfonic Acid at Air/Aqueous Solution Interfaces using Vibrational Sum Frequency Spectroscopy

“…By mathematically transforming the hyperpolarizability elements of the SS and the AS of the methyl group of MSA from molecular coordinates to the laboratory coordinate system via Euler angle rotations, it has been shown previously that the SF response from the SS and the AS of CH modes from methyl groups of C 3v symmetry are of opposite phase. 36 39,40 That is what is observed here.…”

Molecular level studies of polymer behaviors at the water interface using sum frequency generation vibrational spectroscopy

“…53 SFG spectral interpretation is not always straight forward. 61,64 The above SFG studies used polymer thin films prepared on solid substrates. When functional polymeric groups order at both an air or water interface and at the interface of the substrate that the polymer is applied to, these signals may interfere with one another and complicate spectra.…”

Discovery of Oriented Gaseous Water Molecules in the Vapor-Liquid Interface of Water

“…[9-ll] The technique employed in these measurements is surface vibrational sum frequency spectroscopy (VSFS), a second order nonlinear optical process that is interface specific [18] and has been used in previous studies of the molecular structure of liquid surfaces. [19][20][21][22] As a vibrational spectroscopic technique it measures the energy and the intensity of interfacial vibrational modes of water molecules, modes whose energies are highly sensitive to the degree of hydrogen bonding to other water molecules. In addition, due to the coherent nature of sum frequency generation, interferences between vibrational modes provide key information about the relative orientation of interfacial molecules.…”

“…[22][23][24][25] The VSF spectra were obtained for water surfaces at an atmospheric pressure of ~1 atm and at ~ 21° C. HPLC grade water or Nanopure water (18 MÜ) was utilized in these studies. The laser system [26] …”

“…[22][23][24][25] Figure 1 shows the ssp spectrum of the vapor-liquid interface of water. The sps and ppp VSF spectra are shown as an inset in the figure.…”