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Proceedings Paper

Shift Reagents In Fourier Transform Infrared (FTIR)
Author(s): T. Hirschfeld
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Paper Abstract

Absorbance subtract FT-IR suffers from weak intermolecular perturbations, which cause residual differences to remain after the constituents of the sample have been subtracted out. This problem can be redefined into a solution by using precisely these shifts as diagnostics for interesting sample features, in a manner similar to NMR shift reagents. Unlike the NMR case, however, the shifts are typically smaller than the bandwidth, and subtraction is required for their observation and that of the simultaneous intensity effects. The procedure has been demonstrated for a variety of applications, including optical isomer resolution, isolation of spectral features of one compound from those of a mixture, determination of site accessibility on a molecular scale, measuring physical cross linking in a polymer, and following chemical equilibria in samples.

Paper Details

Date Published: 29 October 1981
PDF: 3 pages
Proc. SPIE 0289, 1981 Intl Conf on Fourier Transform Infrared Spectroscopy, (29 October 1981); doi: 10.1117/12.932126
Show Author Affiliations
T. Hirschfeld, Lawrence Livermore National Laboratory (United States)

Published in SPIE Proceedings Vol. 0289:
1981 Intl Conf on Fourier Transform Infrared Spectroscopy
Hajime Sakai, Editor(s)

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