Magneto-Optical Rotatory Dispersion of Porphyrins and Phthalocyanines

Abstract

Recent MORD data in the region of the visible and near-uv absorption bands of some porphyrins and phthalocyanines are analysed. New computer programs are used to fit general formulas to the experimental data and to extract molecular parameters. Theoretical expressions for the latter are derived, adopting the current interpretation of the observed transitions. The over-all agreement with experiment is good, supporting the assignments. The theory also shows that the magnetic moments of the excited states can be obtained from the data. Values obtained agree with a priori calculations in order of magnitude. Further experimental and theoretical work is suggested.