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Liang Y, Mauran D, Prud'homme RE, et al. A new method for the time-resolved analysis of structure and orientation: polarization modulation infrared structural absorbance spectroscopy. Appl Spectrosc. 2008;62(9):941-7doi: 10.1366/000370208785793407.
Liang, Y., Mauran, D., Prud'homme, R. E., & Pellerin, C. (2008). A new method for the time-resolved analysis of structure and orientation: polarization modulation infrared structural absorbance spectroscopy. Applied spectroscopy, 62(9), 941-7. https://doi.org/10.1366/000370208785793407
Liang, Yongri, et al. "A new method for the time-resolved analysis of structure and orientation: polarization modulation infrared structural absorbance spectroscopy." Applied spectroscopy vol. 62,9 (2008): 941-7. doi: https://doi.org/10.1366/000370208785793407
Liang Y, Mauran D, Prud'homme RE, Pellerin C. A new method for the time-resolved analysis of structure and orientation: polarization modulation infrared structural absorbance spectroscopy. Appl Spectrosc. 2008 Sep;62(9):941-7. doi: 10.1366/000370208785793407. PMID: 18801231.
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Appl Spectrosc. 2008 Sep;62(9):941-7. doi: 10.1366/000370208785793407.

A new method for the time-resolved analysis of structure and orientation: polarization modulation infrared structural absorbance spectroscopy.

Applied spectroscopy

Yongri Liang, Damien Mauran, Robert E Prud'homme, Christian Pellerin

Affiliations

  1. Department of Chemistry, University of Montreal, CP 6128 Station Centre-ville, Montréal, QC, H3C 3J7, Canada.

PMID: 18801231 DOI: 10.1366/000370208785793407

Abstract

Polarization modulation infrared linear dichroism (PM-IRLD) is often used for measurements of molecular orientation with high sensitivity and good time resolution. However, PM-IRLD is unable to provide the structural absorbance spectrum because it does not measure separately the parallel and perpendicular spectra. Here we propose a new method, named polarization modulation infrared structural absorbance spectroscopy (PM-IRSAS), to overcome this limitation of PM-IRLD. PM-IRSAS measures the dichroic difference and structural absorbance spectra simultaneously and, therefore, allows quantitative analysis of molecular orientation and conformation with 200 ms time resolution. The PM-IRSAS method was first validated through comparison with conventional polarized FT-IR spectroscopy using drawn polymer films. Second, it was demonstrated that the PM-IRSAS method can provide a quantitative analysis of dynamic orientation and conformation changes in PET films during deformation and crystallization processes.

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