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Molecular Physics
An International Journal at the Interface Between Chemistry and Physics
Volume 45, 1982 - Issue 6
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Original Articles

The phosphorescent 3Eu state of zinc porphin in n-alkane host crystals

Temperature dependence of the electron spin resonance transitions and spin-lattice relaxation in zero-field

H.M. van Noort Centre for the Study of the Excited States of Molecules, Huygens Laboratory, University of Leiden, 2300 RA, Leiden, The Netherlands
,
B. Wirnitzer Centre for the Study of the Excited States of Molecules, Huygens Laboratory, University of Leiden, 2300 RA, Leiden, The Netherlands
,
J. Schmidt Centre for the Study of the Excited States of Molecules, Huygens Laboratory, University of Leiden, 2300 RA, Leiden, The Netherlands
&
J.H. van der Waals Centre for the Study of the Excited States of Molecules, Huygens Laboratory, University of Leiden, 2300 RA, Leiden, The Netherlands
Pages 1259-1269 | Received 20 Nov 1981, Accepted 10 Dec 1981, Published online: 22 Aug 2006
 
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Abstract

A magnetic resonance study is reported of the 3 Eu state of zinc porphin in an n-octane host in zero field from 1·2 K to 65 K. The temperature dependence is caused by an exchange process between the two orbital components of the 3 Eu state. Spin-lattice relaxation is dominated by thermal excitation to a close lying local phonon state. Crystal field splittings have been determined for the 3 Eu and 1 Eu (S 2) states of zinc porphin in a series of n-alkanes.

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