Journal ArticleDOI
Anomalous Dispersion Effects in the IR-ATR Spectroscopy of Water:
TLDR
In this paper, the anomalous dispersion (AD) of water at the interface between the optical element and bulk solution was modeled with approximation-free calculations, and the modeled spectra were compared with experimental ATR spectra for different internal reflection elements.Abstract:
The distortion of band shapes seen in infrared attenuated total reflection (IR-ATR) spectroscopy of strongly absorbing materials such as water, relative to transmission sampling, is shown here to be due to the anomalous dispersion (AD) of water. This distortion occurs in addition to the normal 1/upsilon dependence, and, contrary to previous reports, is shown to not be due to chemical changes of water at the interface between the optical element and bulk solution. IR-ATR spectra of water were modeled with approximation-free calculations. The modeled spectra are compared with experimental ATR spectra for different internal reflection elements, and the results are discussed in terms of the AD optical effect.read more
Citations
More filters
Journal ArticleDOI
Evolution of the Adsorbed Water Layer Structure on Silicon Oxide at Room Temperature
David B. Asay,Seong H. Kim +1 more
TL;DR: The molecular configuration of water adsorbed on a hydrophilic silicon oxide surface at room temperature has been determined as a function of relative humidity using attenuated total reflection (ATR)-infrared spectroscopy and indicates that the outermost layer of the Adsorbed water molecules undergoes transitions in equilibrium behavior as humidity varies.
Journal ArticleDOI
Vibrational Spectroscopy of Ionic Liquids
TL;DR: The conceptual basis of theoretical frameworks which have been used to interpret vibrational spectra of ionic liquids are reviewed, helping the reader to distinguish the scope of application of different methods of calculation.
Journal ArticleDOI
Fourier Transform Infrared Spectrometric Analysis of Protein Conformation: Effect of Sampling Method and Stress Factors
TL;DR: It is revealed that the amide I, II, and III bands differ in their sensitivities to changes in protein conformation: For example, strong bands in the region 1620-1630 and 1685-1695 cm(-1) were seen in the amid I region of aggregated protein spectra, while absorbance of such magnitudes was not observed in theAmide II and III region.
Journal ArticleDOI
Detection of chiral sum frequency generation vibrational spectra of proteins and peptides at interfaces in situ
TL;DR: This work indicates that the off-electronic resonance SFG technique is sensitive enough to collect chiral SFG vibrational spectra of interfacial proteins and peptides, providing more structural information to elucidate interfacial protein and peptide structures.
Journal ArticleDOI
Cavity-enhanced optical frequency comb spectroscopy in the mid-infrared application to trace detection of hydrogen peroxide
Aleksandra Foltynowicz,Aleksandra Foltynowicz,Piotr Masłowski,Adam J. Fleisher,Bryce J. Bjork,Jun Ye +5 more
TL;DR: In this article, the first cavity-enhanced opti- cal frequency comb spectroscopy in the mid-infrared wave-length region was presented, where the comb spectrum with a bandwidth of 200 nm centered around 3.76 µm was simul- taneously coupled to the cavity and both degrees of free-dom of the comb, i.e. the repetition rate and carrier envelope offset frequency, were locked to the cavities to ensure stable transmission.
References
More filters
Journal ArticleDOI
Electric Fields Produced by the Propagation of Plane Coherent Electromagnetic Radiation in a Stratified Medium
TL;DR: In this article, the mean square electric fields induced by plane electromagnetic radiation in a two-phase, three-phase and N-phase stratified medium are derived, and the energy absorption process is discussed.
Journal ArticleDOI
Vibrational spectra of water molecules at quartz/water interfaces.
Q Du,Eric Freysz,Y. R. Shen +2 more
TL;DR: Optical sum-frequency generation was used to study OH stretch vibrations of water molecules at fused quartz-water interfaces and indicates that orientations and bond ordering of interfacial water molecules are strongly affected by electrostatic interaction and hydrogen bonding.
Journal ArticleDOI
Optical constants of water in the infrared
Harry D. Downing,Dudley Williams +1 more
TL;DR: Williams, J.R.Rusk, D.W.Robertson and D.Williams, the authors Am.Opt.Soc. Am.61, 895 (1971).
Journal ArticleDOI
Infrared intensities of liquids. 5. Optical and dielectric constants, integrated intensities, and dipole moment derivatives of water and water-d2 at 22.degree.C
TL;DR: In this paper, the dipole moment derivatives with respect to stretching and bending internal coordinates from the areas under the bands in molar conductivity spectra were calculated for H{sub 2}O and D{sub 1}O, respectively, using the simple bondmoment model, a diagonal force field, and neglect of stretch-bend interaction.
Related Papers (5)
Influence of Anomalous Dispersion on the ATR Spectra of Aqueous Solutions
Jean-Joseph Max,Camille Chapados +1 more
Subtraction of the Water Spectra from the Infrared Spectrum of Saline Solutions
Infrared Intensities of Liquids XX: The Intensity of the OH Stretching Band of Liquid Water Revisited, and the Best Current Values of the Optical Constants of H 2 O(l) at 25°C between 15,000 and 1 cm -1
John E. Bertie,Zhida Lan +1 more