Zeeman spectroscopy of the ⁴E_u→²B_1g phosphorescence of copper porphin in an n-alkane single crystal

II. The intensity problem

N. Van Dijk Huygens and Gorlaeus Laboratories, Centre for the Study of the Excited States of Molecules, Leiden, The Netherlands; Shell Recherche S.A., Centre de Recherche, 76530, Grand-Couronne, France

M. Noort Huygens and Gorlaeus Laboratories, Centre for the Study of the Excited States of Molecules, Leiden, The Netherlands

J.H. Van Der Waals Huygens and Gorlaeus Laboratories, Centre for the Study of the Excited States of Molecules, Leiden, The Netherlands

Abstract

For the 0-0 and main vibronic bands the Zeeman pattern is determined as a function of the temperature and the strength and direction of B. The intensities of the components in the pattern of the 0-0 band are explained by a mechanism of spin-orbit coupling (SOC), which besides the route described by Ake and Gouterman, involves two additional paths of SOC. The very intense 218/223 cm^-1 vibronic band is studied in detail. It is assigned to an e_g mode and accounted for by a mechanism of SOC and vibronic coupling, involving a ² B _2u charge transfer state.

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Zeeman spectroscopy of the ⁴E_u→²B_1g phosphorescence of copper porphin in an n-alkane single crystal

II. The intensity problem

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Zeeman spectroscopy of the 4Eu→2B1g phosphorescence of copper porphin in an n-alkane single crystal

II. The intensity problem

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Zeeman spectroscopy of the ⁴E_u→²B_1g phosphorescence of copper porphin in an n-alkane single crystal