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Applied Spectroscopy

Applied Spectroscopy


  • Vol. 42, Iss. 1 — Jan. 1, 1988
  • pp: 32–38

A Solution to the Artifact Problem in Fourier Transform Vibrational Circular Dichroism

Petr Malon and Timothy A. Keiderling

Applied Spectroscopy, Vol. 42, Issue 1, pp. 32-38 (1988)

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Using a newly constructed FT-IR vibrational circular dichroism (VCD) instrument, we have found that elimination of the ellipsoidal collection mirror before the detector and its replacement by a lens leads to a significant improvement in the absorption artifact problem seen previously in FT-IR/VCD. In the mid-IR region, we have been able to measure VCD of a single enantiomer for molecules such as α-pinene, 3-methyl-cyclohexanone, and dimethyltartrate. More importantly, this reduction in artifact level brings the FT-IR/VCD band shape of some particularly-difficult-to-measure bands, such as carbonyl stretches, into better agreement with those found in dispersive measurements. These results imply that the dispersive results are reliable, though of lower resolution than those obtained with the use of FT-IR/VCD.

Petr Malon and Timothy A. Keiderling, "A Solution to the Artifact Problem in Fourier Transform Vibrational Circular Dichroism," Appl. Spectrosc. 42, 32-38 (1988)

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