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Frequency-frequency correlation functions and apodization in two-dimensional infrared vibrational echo spectroscopy: a new approach.
- K. Kwak, Sungnam Park, I. Finkelstein, M. Fayer
- PhysicsThe Journal of chemical physics
- 26 September 2007
A new observable is presented that greatly simplifies the extraction of the FFCF from experimental data that is the inverse of the center line slope (CLS) of the 2D spectrum and is essentially unaffected by Fourier filtering methods (apodization).
Hydrogen bond dynamics in aqueous NaBr solutions
- Sungnam Park, M. Fayer
- Materials ScienceProceedings of the National Academy of Sciences
- 23 October 2007
Hydrogen bond dynamics of water in NaBr solutions are studied by using ultrafast 2D IR vibrational echo spectroscopy and polarization-selective IR pump–probe experiments, which permit quantitative comparisons of the influence of NaBr concentration on the hydrogen bond dynamics.
Testing the core/shell model of nanoconfined water in reverse micelles using linear and nonlinear IR spectroscopy.
- I. Piletic, David E. Moilanen, D. B. Spry, N. Levinger, M. Fayer
- PhysicsThe journal of physical chemistry. A
- 29 March 2006
It is proposed that, when hydrogen bond structural rearrangement is involved (orientational relaxation and spectral diffusion), dynamical coupling between the shell and the core cause the water nanopool to display more homogeneous dynamics.
Water dynamics--the effects of ions and nanoconfinement.
The water orientational relaxation in the 4 nm diameter nanopools of the two types of reverse micelles is almost identical, which indicates that confinement by an interface to form a nanoscopically confined water pool is a primary factor governing the dynamics of nanoscopic water rather than the presence of charged groups at the interface.
Shocked molecular solids: Vibrational up pumping, defect hot spot formation, and the onset of chemistry
A model and detailed calculations are presented to describe the flow of energy in a shocked solid consisting of large organic molecules. The shock excites the bulk phonons, which rapidly achieve a…
Water at the surfaces of aligned phospholipid multibilayer model membranes probed with ultrafast vibrational spectroscopy.
- Wei Zhao, David E. Moilanen, Emily E. Fenn, M. Fayer
- Chemistry, PhysicsJournal of the American Chemical Society
- 22 October 2008
The population decays suggest the existence of two major types of water molecules in the interfacial region of the lipid bilayers, and the agreement of the magnitudes of the two components obtained from IR spectra with those from vibrational lifetime measurements further supports the two-component model.
Dynamics of water probed with vibrational echo correlation spectroscopy.
The results are an improved FTCF compared to that obtained previously with vibrational echo correlation spectroscopy, and the SPC-FQ derived FTCF is much closer to the experimental results than previously tested nonpolarizable water models which are also presented.
Analysis of water in confined geometries and at interfaces.
Ultrafast infrared polarization- and wavelength-selective pump-probe experiments can measure the orientational relaxation of water and distinguish water at an interface from water removed from an interface, providing quantitative determination of the dynamics of water as a function of the size and nature of the confining structure.
Excitation transfer in disordered two‐dimensional and anisotropic three‐dimensional systems: Effects of spatial geometry on time‐resolved observables
A unified treatment of dipole–dipole excitation transfer in disordered systems is presented for the cases of direct trapping (DT) in two‐component systems and donor–donor transfer (DD) in…
Structural Dynamics of a Catalytic Monolayer Probed by Ultrafast 2D IR Vibrational Echoes
- D. Rosenfeld, Zsolt Gengeliczki, Brian J. Smith, T. D. Stack, M. Fayer
- 4 November 2011
A method to track fast vibrational motion in solution to probing the interfacial dynamics and structure of a silica surface-tethered transition metal carbonyl complex—tricarbonyl (1,10-phenanthroline)rhenium chloride—of interest as a photoreduction catalyst is extended to catalytically important solid/liquid interfaces.