6 Two-Dimensional Correlation Spectroscopy
115
Fig. 6.3 Synchronous and
asynchronous spectra
obtained from the spectra
shown in Fig. 6.2
changes at ν 1 and ν 2 (Fig. 6.3b). The presence of the asynchronous peak at (ν 1 , ν 2 )
evidences that the spectral changes at ν 1 and ν 2 occur at different rate or are shifted
in-phase. This way, one can differentiate the spectral responses from various components of the sample. This is an important feature of 2DCOS, which allows for the
resolution enhancement. Irrespective of the separation, the peaks are resolved in the
asynchronous spectrum as long as their spectral responses follow different pattern.
To easy interpretation of 2D asynchronous contour plots, one can multiply the asynchronous intensity at (ν 1 , ν 2 ) by the sign of the synchronous intensity at the same
115
Fig. 6.3 Synchronous and
asynchronous spectra
obtained from the spectra
shown in Fig. 6.2
changes at ν 1 and ν 2 (Fig. 6.3b). The presence of the asynchronous peak at (ν 1 , ν 2 )
evidences that the spectral changes at ν 1 and ν 2 occur at different rate or are shifted
in-phase. This way, one can differentiate the spectral responses from various components of the sample. This is an important feature of 2DCOS, which allows for the
resolution enhancement. Irrespective of the separation, the peaks are resolved in the
asynchronous spectrum as long as their spectral responses follow different pattern.
To easy interpretation of 2D asynchronous contour plots, one can multiply the asynchronous intensity at (ν 1 , ν 2 ) by the sign of the synchronous intensity at the same