Study of vibronic spectra of tetrabenzoporphin based on normal-coordinate analysis

The quasi-line fluorescence spectra have been measured and analyzed in deta il for the molecules of tetrabenzoporphin and its N-deuterated derivative i n n-octane. The calculations of the normal modes of these molecules have be en carried out with the use of the valence force fields of porphin and phen anthrene. Sufficiently good agreement of the calculated and experimental fr equencies of the modes has been obtained without variation of the force con stants. Detailed interpretation of the fluorescence spectra is given.