Deterministic quantum chaos in the system of vibration-rotation levels of porphyrin molecules according to IR spectroscopy data

The IR spectra of porphyrins were shown to demonstrate the existence of int ernal interrelations in the system of vibration-rotation levels in the "fin gerprint" region (in the wave number range k similar to 400-1700 cm(-1)), w here a peculiar "quantum chaos" (a "pale" with a seemingly chaotic distribu tion of absorption bands) is observed. An analysis by the "flicker-noise sp ectroscopy" method shows that the parameters characterizing these interrela tions within the limits of correlation lengths are peculiar to each porphyr in molecule. This opens up the possibility of classifying porphyrins accord ing to their IR spectra by means of the introduction of some auxiliary para meters in addition to absorption bands considered traditionally. These para meters characterize the whole fingerprint region and, through this, introdu ce deterministic elements into quantum chaos.