Author
 |
Himmelsbach, David |
|
Submitted to: International Conference on High Resolution Spectroscopy
Publication Type: Abstract Only Publication Acceptance Date: 7/10/2000 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: Two-dimensional (2-D) vibrational correlation spectroscopy has now advanced to the stage of realizing many of its touted advantages. Those advantages primarily are: elucidation of chemical interactions of functional groups, simplification of complex spectra, enhancement of spectral resolution by spreading over the second dimension and establishing unambiguous assignments through cross-correlation. Three basic methods have been employed to attain these advantages: dynamical correlation, statistical correlation and canonical correlation analysis. The most popular of these has been dynamical correlation which requires a perturbation due to a stimulus that results in time-dependent fluctuations of spectra. These types of correlations may be applied to almost any form of spectroscopy, yet they have mostly been applied to what may be considered to be forms of high-resolution spectroscopic methods such as mid-infrared (MIR) spectroscopy. However, their usage is even more necessary in low-resolution forms of spectroscopy. Near-infrared (NIR) spectroscopy is a good example of such a low-resolution form for which 2-D correlation spectroscopy is almost required in order to understand the interactions involved. This is due to the fact that no fundamental spectral responses occur in this region. The broad bands are due to overlapping combination and overtone bands of fundamental vibrations originating in the MIR region. Also, NIR bands often display anharmonic effects making band assignments extremely difficult. The results of some applications of this technique in natural matrices will be discussed, along with its future potential in spectroscopy. |
