Quantitative orientation of alpha helical polypeptides by attenuated total reflection infrared spectroscopy
Article Abstract:
Polarized ATR spectroscopy is a powerful method for studying the molecular orientation of thin films and in particular of alpha helical polypeptides. It consists of the determination of the anisotropic optical constants of the studied system, the simulatiom of the polarized ATR spectra for various orientations of the molecular axes, and the comparison of the simulated and experimental spectra.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
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Secondary structure analysis of polypeptides based on an excitonic coupling model to describe the band profile of amide I' of IR, Raman, and vibrational circular dichroism spectra
Article Abstract:
A novel approach, which allows a precise structure analysis of short and intermediate sized peptides, is developed. The vibrational eigenfunctions obtained by diagonalizing the complete Hamiltonian of the interacting amide I' modes are used to calculate the amide I' band profile in the IR, isotropic, and anisotropic Raman and vibrational circular dichroism spectrum.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2004
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Quantitative determination of the polar order induced under high electric field in amorphous PDR1M azobenzene polymer films
Article Abstract:
Experimental evidence for a strong polar ordering induced by wire poling under high electric field conditions in the amorphous pDR1M azobenzene polymer is reported. A comparative study of the electronic spectra of a DR1 solution in chloroform and of an unpoled, a poled and a thermally depoled film is discussed.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2003
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