SMALL AND LARGE SPIN-ORBIT INTERACTION EFFECTS IN THE METAL PHTHALOCYANINES
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Date
1975
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Ohio State University
Abstract
Having made extensive experimental studies of the luminescence properties of metal phthalocyanines in solid solutions in the temperature range from 1.3$^{\circ} K$ to $300^{\circ} K$ , we have applied the theoretical model for the triplet sublevel arrangement in the limit of small spin-orbit interaction used by Gouterman et al. (J. Chem, Phys. 56, 4073 (1972) for Zn-etioporphyrin and extended it to the limit of Large spin-orbit coupling. We obtain an arrangement of the electronic states of interest as a function of the magnitude of the spin orbit interaction which allows us to interpret our experimental results in considerable detail and to correlate the observed complex luminescence behavior of ruthenium phthalocyanine with that of other metal phthalocyanines. The important result is that the observed aero-field triplet sublevel splittings in the various metal phthalocyanines now fall into a consistent pattern in terms of different strengths of the spin-orbit coupling.
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Author Institution: Departments of Physics and Chemistry, Simon Fraser University