Papers by Manfred Kriechbaum
Journal of Colloid and Interface Science, 2011
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We report X-ray powder diffraction studies on oligophenyls for pressures up to 2 kbar. Geometries... more We report X-ray powder diffraction studies on oligophenyls for pressures up to 2 kbar. Geometries of biphenyl were optimized using 3D band structure calculations based on the obtained unit cell dimensions. The optical absorption under increasing pressure has been computed for the relaxed structures. It displays a red shift in agreement with experimental findings. We probed polycrystalline oligophenyl powders under pressures up to 80 kbar and temperatures of 10-300 K with Raman scattering. The results are compared to Hartree Fock simulated Raman spectra of isolated molecules and band structure computed phonon frequencies of the crystalline polymer. We find temperature and pressure induced non-planar to planar phase transitions in these materials.
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European Biophysics Journal, 2000
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Papers by Manfred Kriechbaum