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Linear infrared dichroism by a double modulation technique
Author(s) -
Abetz Volker,
Fuller Gerald G.,
Stadler Reimund
Publication year - 1991
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19910520105
Subject(s) - dichroic glass , absorbance , linear dichroism , dichroism , fourier transform , fourier transform infrared spectroscopy , optics , vibrational circular dichroism , infrared , sensitivity (control systems) , materials science , analytical chemistry (journal) , modulation (music) , spectroscopy , infrared spectroscopy , circular dichroism , fourier transform spectroscopy , amplitude modulation , chemistry , physics , frequency modulation , acoustics , computer science , crystallography , chromatography , telecommunications , bandwidth (computing) , electronic engineering , engineering , organic chemistry , quantum mechanics
In the first part of this paper an experimental setup using Fourier‐transform infrared spectroscopy (FTIR) in combination with a photoelastic modulator (PEM) for linear dichroism measurements is described. The second part shows the influence of PEM‐amplitude and scan‐velocity on the sensitivity of the instrument. The third part deals with the fringe‐problem in the baselines of absorbance spectra and its influence on the determination of the linear dichroic ratio.