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  Characterizing the three-dimensional orientation in polymers using FT-IR spectroscopy with linear polarized light

Brüll, R., Maria, R., & Rode, K. (2010). Characterizing the three-dimensional orientation in polymers using FT-IR spectroscopy with linear polarized light. Macromolecular Chemistry and Physics, 211(20), 2233-2239. doi:10.1002/macp.201000135.

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 Creators:
Brüll, Robert, Author
Maria, Raquel1, Author           
Rode, Karsten, Author
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1External Organizations, ou_persistent22              

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Free keywords: calculations, FT-IR, infrared dichroism, molecular orientation, polarized spectroscopy, three-dimensional model
 Abstract: The quantity of absorbance of linear polarized light depends for a given wavelength on the angle between an absorbing transition moment vector and the electric vector of the polarized light. Fraser used this relationship to interpret the infrared dichroism in axially oriented polymers. This model can be extended to calculate the orientation in three dimensions by transforming the Fraser's equation into a P2-Legendre polynomial. As a result the orientation in three directions—fx, fy, and fz—can be calculated directly from the individual absorbances measured with an electric vector along the axes of interest, the structural absorbance A0 of the sample, and the angle of the transition moment vector in reference to the chain axis. Applying the f values into ‘Hermans’ Orientation function', it becomes possible to calculate the average angle of the chain axis with reference to the axes of interest.

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Language(s): eng - English
 Dates: 2010-09-22
 Publication Status: Issued
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/macp.201000135
 Degree: -

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Title: Macromolecular Chemistry and Physics
  Abbreviation : Macromol. Chem. Phys.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley VCH
Pages: - Volume / Issue: 211 (20) Sequence Number: - Start / End Page: 2233 - 2239 Identifier: Other: 1022-1352
CoNE: https://pure.mpg.de/cone/journals/resource/1022-1352