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Investigation of Polarized Infrared Spectra of the Hydrogen Bond in Molecular Crystls. New Spectra Effects in the Vibrational Spectroscopy of Hydrogen Bonded Systems

Flakus H.

Polish Journal of Chemistry

2003

Vol. 77 / nr 5

489-517

Areview of the experimental as well as of the theoretical studies, performed on the area of the infrared spectroscopy of hydrogen bonded molecular crystals, is given. Discussion of some physical phenomena is presented, responsible for basic spectral effects registered in the infrared spectra, as breaking of vibrational dipole selection rules in the IR spectra, linear dichroic as well as temperature effects, observed in the frequency range of the proton stretching vibrations. Also some newly recognized H/D isotopic effects for hydrogen bonded systems are presented, deduced from a quantitative analysis of the polarized spectra in the IR, namely the so called isotopic "self-organization" effects and the "long-range" H/D isotopic effects.