COLL 478 |
| Richard A. Dluhy, Department of Chemistry, Department of Chemistry, University of Georgia, Athens, GA 30602 |
| We have recently introduced several new modified two-dimensional infrared correlation methods for quantitatively determining the degree of coherence between intensity variations in a discrete set of dynamic spectra. These methods perform a mathematical cross correlation between a set of spectra undergoing some dynamic variation against a specific mathematical function. The calculated correlation intensities are a function not only of the spectral frequency but also of a second parameter, such as the phase angle (β) or a rate constant (k), which is characteristic of the function used. Correlation maxima and minima are observed at wavenumber values characteristic of the specific molecular groups involved in the dynamic process, while the intensity of the correlation peaks indicates the relative magnitude of change. We have applied these 2D IR correlation methods to the in-situ IR spectroscopy of monomolecular films at the air-water interface and will illustrate recent results in this presentation. |
|
Vibrational Analyses of Dry and Wet Surfaces
8:30 AM-11:30 AM, Thursday, April 1, 2004 Marriott -- Grand Ballroom H, Oral
Division of Colloid and Surface Chemistry |