Abstract
Low temperature spectroscopy of phthalocyanine and chlorophyll molecules embedded in polystyrene and polyethylene foils at temperatures below 10K are reported. The role of polymer host is discussed in the frame of general theory of low temperature spectroscopy. The broad band and well resolved site selection fluorescence and fluorescence excitation spectra were measured. The vibrational analysis of these site selection spectra was performed and the frequencies of normal vibrations obtained in polymer hosts were compared to those in organic solvents.
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