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Infrared linear dichroism spectroscopy by a double modulation technique

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Summary

A linear IR dichroism experiment has been devised using a FTIR instrument in combination with a photoelastic modulator. Based on the Mueller-Stokes calculus, a method to directly obtain the absorbance spectra Av parallel and Av perpendicular from the modulated interferogram is developped, which allows the sensitive evaluation of the dichroic ratio. The photoelastic modulator, in combination with a FTIR instrument, offers high sensitivity, high speed, excellent signal to noise ratio and a broad spectral range from 3300 to 850 cm-1. First experimental results obstained from SBS block copolymer are reported.

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Authors and Affiliations

  1. Institut für Makromolekulare Chemie, Universität Freiburg, Stefan-Meier-Strasse 31, D-7800, Freiburg, Federal Republic of Germany

    Volker Abetz

  2. Department of Chemical Engineering, Stanford University, 94305-5025, Stanford, CA, USA

    Gerald G. Fuller

  3. Institut für Organische Chemie, Universität Mainz, Johann-Joachim-Becherweg 18-20, D-6500, Mainz, Federal Republic of Germany

    Reimund Stadler

Authors
  1. Volker Abetz
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  2. Gerald G. Fuller
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  3. Reimund Stadler
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Abetz, V., Fuller, G.G. & Stadler, R. Infrared linear dichroism spectroscopy by a double modulation technique. Polymer Bulletin 23, 447–454 (1990). https://doi.org/10.1007/BF00294876

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  • DOI: https://doi.org/10.1007/BF00294876

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