A. S. Starukhin

Interpretation of vibration spectra of metallochlorins

The infrared spectra of Zn-chlorin and Zn-7,8-diethylchlorin, the fine structure of their fluorescence, and the vibrational spectra of Cu-chlorin are interpreted on the basis of normal-mode analysis. The effects of deuteration on the spectral shift of the chlorins is determined. Quantum-chemical calculations are presented which determine the electron density distribution and transitions between ground and vibrational states.

Manifestation of vibronic intensity borrowing in fluorescence spectra of metalloporphyrins

In selective laser excitation and at T=4.2 K, fine-structure spectra of the fluorescence of the complexes of Mg, Zn, In, and TiO with octaethylporphyrin are obtained. It is shown that the fine-structure fluorescence spectra of these compounds are formed to a large aegree by ribronic interaction between quasi-degenerate S1 and S2 electron states. An increase in the relative intensities of a number of negatively polarized fluorescence lines in displacement of the excitation line from a longwave edge of the band of an S0→S1 transition in the shortwave direction is revealed.